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937 results on '"Sugimura Y"'

1. Two superconducting states with broken time-reversal symmetry in FeSe1-xSx

Author

Matsuura, K., Roppongi, M., Qiu, M., Sheng, Q., Cai, Y., Yamakawa, K., Guguchia, Z., Day, R. P., Kojima, K. M., Damascelli, A., Sugimura, Y., Saito, M., Takenaka, T., Ishihara, K., Mizukami, Y., Hashimoto, K., Gu, Y., Guo, S., Fu, L., Zhang, Z., Ning, F., Zhao, G., Dai, G., Jin, C., Beare, J. W., Luke, G. M., Uemura, Y. J., and Shibauchi, T.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

Iron-chalcogenide superconductors FeSe$_{1-x}$S$_x$ possess unique electronic properties such as non-magnetic nematic order and its quantum critical point. The nature of superconductivity with such nematicity is important for understanding the mechanism of unconventional superconductivity. A recent theory suggested the possible emergence of a fundamentally new class of superconductivity with the so-called Bogoliubov Fermi surfaces (BFSs) in this system. However, such an {\em ultranodal} pair state requires broken time-reversal symmetry (TRS) in the superconducting state, which has not been observed experimentally. Here we report muon spin relaxation ($\mu$SR) measurements in FeSe$_{1-x}$S$_x$ superconductors for $0\le x \le 0.22$ covering both orthorhombic (nematic) and tetragonal phases. We find that the zero-field muon relaxation rate is enhanced below the superconducting transition temperature $T_{\rm c}$ for all compositions, indicating that the superconducting state breaks TRS both in the nematic and tetragonal phases. Moreover, the transverse-field $\mu$SR measurements reveal that the superfluid density shows an unexpected and substantial reduction in the tetragonal phase ($x>0.17$). This implies that a significant fraction of electrons remain unpaired in the zero-temperature limit, which cannot be explained by the known unconventional superconducting states with point or line nodes. The time-reversal symmetry breaking and the suppressed superfluid density in the tetragonal phase, together with the reported enhanced zero-energy excitations, are consistent with the ultranodal pair state with BFSs. The present results reveal two different superconducting states with broken TRS separated by the nematic critical point in FeSe$_{1-x}$S$_x$, which calls for the theory of microscopic origins that account for the relation between the nematicity and superconductivity., Comment: 8 pages, 4 figures, typos corrected. Accepted for publication in PNAS

Published
2023
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2. Pure nematic quantum critical point accompanied by a superconducting dome

Author

Ishida, K., Onishi, Y., Tsujii, M., Mukasa, K., Qiu, M., Saito, M., Sugimura, Y., Matsuura, K., Mizukami, Y., Hashimoto, K., and Shibauchi, T.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

When a symmetry-breaking phase of matter is suppressed to a quantum critical point (QCP) at absolute zero, quantum-mechanical fluctuations proliferate. Such fluctuations can lead to unconventional superconductivity, as evidenced by the superconducting domes often found near magnetic QCPs in correlated materials. However, it remains unclear whether this superconductivity mechanism holds for QCPs of the electronic nematic phase, characterized by rotational symmetry breaking. Here, we demonstrate from systematic elastoresistivity measurements that nonmagnetic FeSe$_{1-x}$Te$_{x}$ exhibits an electronic nematic QCP showing diverging nematic susceptibility. This finding establishes two nematic QCPs in FeSe-based superconductors with contrasting accompanying phase diagrams. In FeSe$_{1-x}$Te$_{x}$, a superconducting dome is centered at the QCP, whereas FeSe$_{1-x}$S$_{x}$ shows no QCP-associated enhancement of superconductivity. We find that this difference is related to the relative strength of nematic and spin fluctuations. Our results in FeSe$_{1-x}$Te$_{x}$ present the first case in support of the superconducting dome being associated with the pure nematic QCP., Comment: Submitted version. 9 pages, 7 figures (including Supplementary Information)

Published
2022
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3. Enhanced superconducting pairing strength near a nonmagnetic nematic quantum critical point

Author

Mukasa, K., Ishida, K., Imajo, S., Qiu, M. W., Saito, M., Matsuura, K., Sugimura, Y., Liu, S., Uezono, Y., Otsuka, T., Čulo, M., Kasahara, S., Matsuda, Y., Hussey, N. E., Watanabe, T., Kindo, K., and Shibauchi, T.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
Abstract

The quest for high-temperature superconductivity at ambient pressure is a central issue in physics. In this regard, the relationship between unconventional superconductivity and the quantum critical point (QCP) associated with the suppression of some form of symmetry-breaking order to zero temperature has received particular attention. The key question is how the strength of the electron pairs changes near the QCP, and this can be verified by high-field experiments. However, such studies are limited mainly to superconductors with magnetic QCPs, and the possibility of unconventional mechanisms by which nonmagnetic QCP promotes strong pairing remains a nontrivial issue. Here, we report systematic measurements of the upper critical field $H_{{\rm c2}}$ in nonmagnetic FeSe$_{1-x}$Te$_{x}$ superconductors, which exhibit a QCP of electronic nematicity characterized by spontaneous rotational-symmetry breaking. As the magnetic field increases, the superconducting phase of FeSe$_{1-x}$Te$_{x}$ shrinks to a narrower dome surrounding the nematic QCP. The analysis of $H_{{\rm c2}}$ reveals that the Pauli-limiting field is enhanced toward the QCP, implying that the pairing interaction is significantly strengthened via nematic fluctuations emanated from the QCP. Remarkably, this nonmagnetic nematic QCP is not accompanied by a divergent effective mass, distinct from the magnetically mediated pairing. Our observation opens up a nonmagnetic route to high-temperature superconductivity., Comment: 6 pages, 4 figures

Published
2022
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4. Maximizing Tc by tuning nematicity and magnetism in FeSe1-xSx superconductors

Author

Matsuura, K., Mizukami, Y., Arai, Y., Sugimura, Y., Maejima, N., Machida, A., Watanuki, T., Fukuda, T., Yajima, T., Hiroi, Z., Yip, K. Y., Chan, Y. C., Niu, Q., Hosoi, S., Ishida, K., Mukasa, K., Kasahara, S., Cheng, J. -G., Goh, S. K., Matsuda, Y., Uwatoko, Y., and Shibauchi, T.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons
Abstract

A fundamental issue concerning iron-based superconductivity is the roles of electronic nematicity and magnetism in realising high transition temperature ($T_{\rm c}$). To address this issue, FeSe is a key material, as it exhibits a unique pressure phase diagram involving nonmagnetic nematic and pressure-induced antiferromagnetic ordered phases. However, as these two phases in FeSe overlap with each other, the effects of two orders on superconductivity remain perplexing. Here we construct the three-dimensional electronic phase diagram, temperature ($T$) against pressure ($P$) and isovalent S-substitution ($x$), for FeSe$_{1-x}$S$_{x}$, in which we achieve a complete separation of nematic and antiferromagnetic phases. In between, an extended nonmagnetic tetragonal phase emerges, where we find a striking enhancement of $T_{\rm c}$. The completed phase diagram uncovers two superconducting domes with similarly high $T_{\rm c}$ on both ends of the dome-shaped antiferromagnetic phase. The $T_{\rm c}(P,x)$ variation implies that nematic fluctuations unless accompanying magnetism are not relevant for high-$T_{\rm c}$ superconductivity in this system., Comment: 8 pages, 9 figures. A revised version will appear in Nature Communications

Published
2017
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11. Enhanced Superconducting Pairing Strength near a Pure Nematic Quantum Critical Point

Author

Mukasa, K., Ishida, K., Imajo, S., Qiu, M., Saito, M., Matsuura, K., Sugimura, Y., Liu, S., Uezono, Y., Otsuka, T., Čulo, M., Kasahara, S., Matsuda, Y., Hussey, N.E., Watanabe, T., Kindo, K., Shibauchi, T., Mukasa, K., Ishida, K., Imajo, S., Qiu, M., Saito, M., Matsuura, K., Sugimura, Y., Liu, S., Uezono, Y., Otsuka, T., Čulo, M., Kasahara, S., Matsuda, Y., Hussey, N.E., Watanabe, T., Kindo, K., and Shibauchi, T.

Abstract

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Published
2023

12. A Standardized Technique of Repair of the Mitral Valve in Barlow´s Disease via Minimally Invasive Approach: Mid to Long-Term Results in a Series of 55 Patients.

Author

Ballázs, C., Kamiya, H., Sugimura, Y., Immohr, M.B., Sixt, S.U., Rellecke, P., Ramadani, B., Boeken, U., Aubin, H., Lichtenberg, A., and Akhyari, P.

Subjects
MITRAL valve insufficiency, MITRAL valve, MINIMALLY invasive procedures
Abstract

This article discusses a standardized technique for repairing the mitral valve in Barlow's disease using a minimally invasive approach. The technique involves resecting a segment of the posterior mitral leaflet and transferring preserved chordae to another segment, along with the implantation of a semi-rigid open ring. The study reports the mid to long-term results of 55 patients who underwent this procedure, with a mean follow-up of 127 months. The results show a high repair rate and stable outcomes, with most patients experiencing minimal or no mitral regurgitation and improved functional status. [Extracted from the article]

Published
2024
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20. Decline in subarachnoid haemorrhage volumes associated with the first wave of the COVID-19 pandemic

Author

Nguyen, T.N. Haussen, D.C. Qureshi, M.M. Yamagami, H. Fujinaka, T. Mansour, O.Y. Abdalkader, M. Frankel, M. Qiu, Z. Taylor, A. Lylyk, P. Eker, O.F. Mechtouff, L. Piotin, M. Lima, F.O. Mont'Alverne, F. Izzath, W. Sakai, N. Mohammaden, M. Al-Bayati, A.R. Renieri, L. Mangiafico, S. Ozretic, D. Chalumeau, V. Ahmad, S. Rashid, U. Hussain, S.I. John, S. Griffin, E. Thornton, J. Fiorot, J.A. Rivera, R. Hammami, N. Cervantes-Arslanian, A.M. Dasenbrock, H.H. Vu, H.L. Nguyen, V.Q. Hetts, S. Bourcier, R. Guile, R. Walker, M. Sharma, M. Frei, D. Jabbour, P. Herial, N. Al-Mufti, F. Ozdemir, A.O. Aykac, O. Gandhi, D. Chugh, C. Matouk, C. Lavoie, P. Edgell, R. Beer-Furlan, A. Chen, M. Killer-Oberpfalzer, M. Pereira, V.M. Nicholson, P. Huded, V. Ohara, N. Watanabe, D. Shin, D.H. Magalhaes, P.S.C. Kikano, R. Ortega-Gutierrez, S. Farooqui, M. Abou-Hamden, A. Amano, T. Yamamoto, R. Weeks, A. Cora, E.A. Sivan-Hoffmann, R. Crosa, R. Möhlenbruch, M. Nagel, S. Al-Jehani, H. Sheth, S.A. Rivera, V.S.L. Siegler, J.E. Sani, A.F. Puri, A.S. Kuhn, A.L. Bernava, G. Machi, P. Abud, D.G. Pontes-Neto, O.M. Wakhloo, A.K. Voetsch, B. Raz, E. Yaghi, S. Mehta, B.P. Kimura, N. Murakami, M. Lee, J.S. Hong, J.M. Fahed, R. Walker, G. Hagashi, E. Cordina, S.M. Roh, H.G. Wong, K. Arenillas, J.F. Martinez-Galdamez, M. Blasco, J. Vasquez, A.R. Fonseca, L. Silva, M.L. Wu, T.Y. John, S. Brehm, A. Psychogios, M. Mack, W.J. Tenser, M. Todaka, T. Fujimura, M. Novakovic, R. Deguchi, J. Sugiura, Y. Tokimura, H. Khatri, R. Kelly, M. Peeling, L. Murayama, Y. Winters, H.S. Wong, J. Teleb, M. Payne, J. Fukuda, H. Miyake, K. Shimbo, J. Sugimura, Y. Uno, M. Takenobu, Y. Matsumaru, Y. Yamada, S. Kono, R. Kanamaru, T. Morimoto, M. Iida, J. Saini, V. Yavagal, D. Bushnaq, S. Huang, W. Linfante, I. Kirmani, J. Liebeskind, D.S. Szeder, V. Shah, R. Devlin, T.G. Birnbaum, L. Luo, J. Churojana, A. Masoud, H.E. Lopez, C.Y. Steinfort, B. Ma, A. Hassan, A.E. Al Hashmi, A. McDermott, M. Mokin, M. Chebl, A. Kargiotis, O. Tsivgoulis, G. Morris, J.G. Eskey, C.J. Thon, J. Rebello, L. Altschul, D. Cornett, O. Singh, V. Pandian, J. Kulkarni, A. Lavados, P.M. Olavarria, V.V. Todo, K. Yamamoto, Y. Silva, G.S. Geyik, S. Johann, J. Multani, S. Kaliaev, A. Sonoda, K. Hashimoto, H. Alhazzani, A. Chung, D.Y. Mayer, S.A. Fifi, J.T. Hill, M.D. Zhang, H. Yuan, Z. Shang, X. Castonguay, A.C. Gupta, R. Jovin, T.G. Raymond, J. Zaidat, O.O. Nogueira, R.G.

Subjects
cardiovascular diseases, nervous system diseases
Abstract

Background During the COVID-19 pandemic, decreased volumes of stroke admissions and mechanical thrombectomy were reported. The study's objective was to examine whether subarachnoid haemorrhage (SAH) hospitalisations and ruptured aneurysm coiling interventions demonstrated similar declines. Methods We conducted a cross-sectional, retrospective, observational study across 6 continents, 37 countries and 140 comprehensive stroke centres. Patients with the diagnosis of SAH, aneurysmal SAH, ruptured aneurysm coiling interventions and COVID-19 were identified by prospective aneurysm databases or by International Classification of Diseases, 10th Revision, codes. The 3-month cumulative volume, monthly volumes for SAH hospitalisations and ruptured aneurysm coiling procedures were compared for the period before (1 year and immediately before) and during the pandemic, defined as 1 March-31 May 2020. The prior 1-year control period (1 March-31 May 2019) was obtained to account for seasonal variation. Findings There was a significant decline in SAH hospitalisations, with 2044 admissions in the 3 months immediately before and 1585 admissions during the pandemic, representing a relative decline of 22.5% (95% CI -24.3% to -20.7%, p

Published
2021

21. Global impact of COVID-19 on stroke care

Author

Nogueira, R.G. Abdalkader, M. Qureshi, M.M. Frankel, M.R. Mansour, O.Y. Yamagami, H. Qiu, Z. Farhoudi, M. Siegler, J.E. Yaghi, S. Raz, E. Sakai, N. Ohara, N. Piotin, M. Mechtouff, L. Eker, O. Chalumeau, V. Kleinig, T.J. Pop, R. Liu, J. Winters, H.S. Shang, X. Vasquez, A.R. Blasco, J. Arenillas, J.F. Martinez-Galdamez, M. Brehm, A. Psychogios, M.-N. Lylyk, P. Haussen, D.C. Al-Bayati, A.R. Mohammaden, M.H. Fonseca, L. Luís Silva, M. Montalverne, F. Renieri, L. Mangiafico, S. Fischer, U. Gralla, J. Frei, D. Chugh, C. Mehta, B.P. Nagel, S. Mohlenbruch, M. Ortega-Gutierrez, S. Farooqui, M. Hassan, A.E. Taylor, A. Lapergue, B. Consoli, A. Campbell, B.C.V. Sharma, M. Walker, M. Van Horn, N. Fiehler, J. Nguyen, H.T. Nguyen, Q.T. Watanabe, D. Zhang, H. Le, H.V. Nguyen, V.Q. Shah, R. Devlin, T. Khandelwal, P. Linfante, I. Izzath, W. Lavados, P.M. Olavarría, V.V. Sampaio Silva, G. de Carvalho Sousa, A.V. Kirmani, J. Bendszus, M. Amano, T. Yamamoto, R. Doijiri, R. Tokuda, N. Yamada, T. Terasaki, T. Yazawa, Y. Morris, J.G. Griffin, E. Thornton, J. Lavoie, P. Matouk, C. Hill, M.D. Demchuk, A.M. Killer-Oberpfalzer, M. Nahab, F. Altschul, D. Ramos-Pachón, A. Pérez de la Ossa, N. Kikano, R. Boisseau, W. Walker, G. Cordina, S.M. Puri, A. Luisa Kuhn, A. Gandhi, D. Ramakrishnan, P. Novakovic-White, R. Chebl, A. Kargiotis, O. Czap, A. Zha, A. Masoud, H.E. Lopez, C. Ozretic, D. Al-Mufti, F. Zie, W. Duan, Z. Yuan, Z. Huang, W. Hao, Y. Luo, J. Kalousek, V. Bourcier, R. Guile, R. Hetts, S. Al-Jehani, H.M. AlHazzani, A. Sadeghi-Hokmabadi, E. Teleb, M. Payne, J. Lee, J.S. Hong, J.M. Sohn, S.-I. Hwang, Y.-H. Shin, D.H. Roh, H.G. Edgell, R. Khatri, R. Smith, A. Malik, A. Liebeskind, D. Herial, N. Jabbour, P. Magalhaes, P. Ozdemir, A.O. Aykac, O. Uwatoko, T. Dembo, T. Shimizu, H. Sugiura, Y. Miyashita, F. Fukuda, H. Miyake, K. Shimbo, J. Sugimura, Y. Beer-Furlan, A. Joshi, K. Catanese, L. Abud, D.G. Neto, O.G. Mehrpour, M. Al Hashmi, A. Saqqur, M. Mostafa, A. Fifi, J.T. Hussain, S. John, S. Gupta, R. Sivan-Hoffmann, R. Reznik, A. Sani, A.F. Geyik, S. Akıl, E. Churojana, A. Ghoreishi, A. Saadatnia, M. Sharifipour, E. Ma, A. Faulder, K. Wu, T. Leung, L. Malek, A. Voetsch, B. Wakhloo, A. Rivera, R. Barrientos Iman, D.M. Pikula, A. Lioutas, V.-A. Thomalla, G. Birnbaum, L. Machi, P. Bernava, G. McDermott, M. Kleindorfer, D. Wong, K. Patterson, M.S. Fiorot, J.A., Jr. Huded, V. Mack, W. Tenser, M. Eskey, C. Multani, S. Kelly, M. Janardhan, V. Cornett, O. Singh, V. Murayama, Y. Mokin, M. Yang, P. Zhang, X. Yin, C. Han, H. Peng, Y. Chen, W. Crosa, R. Frudit, M.E. Pandian, J.D. Kulkarni, A. Yagita, Y. Takenobu, Y. Matsumaru, Y. Yamada, S. Kono, R. Kanamaru, T. Yamazaki, H. Sakaguchi, M. Todo, K. Yamamoto, N. Sonoda, K. Yoshida, T. Hashimoto, H. Nakahara, I. Cora, E. Volders, D. Ducroux, C. Shoamanesh, A. Ospel, J. Kaliaev, A. Ahmed, S. Rashid, U. Rebello, L.C. Pereira, V.M. Fahed, R. Chen, M. Sheth, S.A. Palaiodimou, L. Tsivgoulis, G. Chandra, R. Koyfman, F. Leung, T. Khosravani, H. Dharmadhikari, S. Frisullo, G. Calabresi, P. Tsiskaridze, A. Lobjanidze, N. Grigoryan, M. Czlonkowska, A. de Sousa, D.A. Demeestere, J. Liang, C. Sangha, N. Lutsep, H.L. Ayo-Martín, Ó. Cruz-Culebras, A. Tran, A.D. Young, C.Y. Cordonnier, C. Caparros, F. De Lecinana, M.A. Fuentes, B. Yavagal, D. Jovin, T. Spelle, L. Moret, J. Khatri, P. Zaidat, O. Raymond, J. Martins, S. Nguyen, T.

Abstract

Background: The COVID-19 pandemic led to profound changes in the organization of health care systems worldwide. Aims: We sought to measure the global impact of the COVID-19 pandemic on the volumes for mechanical thrombectomy, stroke, and intracranial hemorrhage hospitalizations over a three-month period at the height of the pandemic (1 March–31 May 2020) compared with two control three-month periods (immediately preceding and one year prior). Methods: Retrospective, observational, international study, across 6 continents, 40 countries, and 187 comprehensive stroke centers. The diagnoses were identified by their ICD-10 codes and/or classifications in stroke databases at participating centers. Results: The hospitalization volumes for any stroke, intracranial hemorrhage, and mechanical thrombectomy were 26,699, 4002, and 5191 in the three months immediately before versus 21,576, 3540, and 4533 during the first three pandemic months, representing declines of 19.2% (95%CI, −19.7 to −18.7), 11.5% (95%CI, −12.6 to −10.6), and 12.7% (95%CI, −13.6 to −11.8), respectively. The decreases were noted across centers with high, mid, and low COVID-19 hospitalization burden, and also across high, mid, and low volume stroke/mechanical thrombectomy centers. High-volume COVID-19 centers (−20.5%) had greater declines in mechanical thrombectomy volumes than mid- (−10.1%) and low-volume (−8.7%) centers (p < 0.0001). There was a 1.5% stroke rate across 54,366 COVID-19 hospitalizations. SARS-CoV-2 infection was noted in 3.9% (784/20,250) of all stroke admissions. Conclusion: The COVID-19 pandemic was associated with a global decline in the volume of overall stroke hospitalizations, mechanical thrombectomy procedures, and intracranial hemorrhage admission volumes. Despite geographic variations, these volume reductions were observed regardless of COVID-19 hospitalization burden and pre-pandemic stroke/mechanical thrombectomy volumes. © 2021 World Stroke Organization.

Published
2021

22. Global Impact of COVID-19 on Stroke Care and IV Thrombolysis

Author

Nogueira, R.G. Qureshi, M.M. Abdalkader, M. Martins, S.O. Yamagami, H. Qiu, Z. Mansour, O.Y. Sathya, A. Czlonkowska, A. Tsivgoulis, G. Aguiar de Sousa, D. Demeestere, J. Mikulik, R. Vanacker, P. Siegler, J.E. Kõrv, J. Biller, J. Liang, C.W. Sangha, N.S. Zha, A.M. Czap, A.L. Holmstedt, C.A. Turan, T.N. Ntaios, G. Malhotra, K. Tayal, A. Loochtan, A. Ranta, A. Mistry, E.A. Alexandrov, A.W. Huang, D.Y. Yaghi, S. Raz, E. Sheth, S.A. Mohammaden, M.H. Frankel, M. Bila Lamou, E.G. Aref, H.M. Elbassiouny, A. Hassan, F. Menecie, T. Mustafa, W. Shokri, H.M. Roushdy, T. Sarfo, F.S. Alabi, T.O. Arabambi, B. Nwazor, E.O. Sunmonu, T.A. Wahab, K. Yaria, J. Mohammed, H.H. Adebayo, P.B. Riahi, A.D. Sassi, S.B. Gwaunza, L. Ngwende, G.W. Sahakyan, D. Rahman, A. Ai, Z. Bai, F. Duan, Z. Hao, Y. Huang, W. Li, G. Li, W. Liu, G. Luo, J. Shang, X. Sui, Y. Tian, L. Wen, H. Wu, B. Yan, Y. Yuan, Z. Zhang, H. Zhang, J. Zhao, W. Zi, W. Leung, T.W. Chugh, C. Huded, V. Menon, B. Pandian, J.D. Sylaja, P.N. Usman, F.S. Farhoudi, M. Hokmabadi, E.S. Horev, A. Reznik, A. Sivan Hoffmann, R. Ohara, N. Sakai, N. Watanabe, D. Yamamoto, R. Doijiri, R. Tokuda, N. Yamada, T. Terasaki, T. Yazawa, Y. Uwatoko, T. Dembo, T. Shimizu, H. Sugiura, Y. Miyashita, F. Fukuda, H. Miyake, K. Shimbo, J. Sugimura, Y. Yagita, Y. Takenobu, Y. Matsumaru, Y. Yamada, S. Kono, R. Kanamaru, T. Yamazaki, H. Sakaguchi, M. Todo, K. Yamamoto, N. Sonoda, K. Yoshida, T. Hashimoto, H. Nakahara, I. Kondybayeva, A. Faizullina, K. Kamenova, S. Zhanuzakov, M. Baek, J.-H. Hwang, Y. Lee, J.S. Lee, S.B. Moon, J. Park, H. Seo, J.H. Seo, K.-D. Sohn, S.I. Young, C.J. Ahdab, R. Wan Zaidi, W.A. Aziz, Z.A. Basri, H.B. Chung, L.W. Ibrahim, A.B. Ibrahim, K.A. Looi, I. Tan, W.Y. Yahya, N.W. Groppa, S. Leahu, P. Al Hashmi, A.M. Imam, Y.Z. Akhtar, N. Pineda-Franks, M.C. Co, C.O. Kandyba, D. Alhazzani, A. Al-Jehani, H. Tham, C.H. Mamauag, M.J. Venketasubramanian, N. Chen, C.-H. Tang, S.-C. Churojana, A. Akil, E. Aykaç, Ö. Ozdemir, A.O. Giray, S. Hussain, S.I. John, S. Le Vu, H. Tran, A.D. Nguyen, H.H. Nhu Pham, T. Nguyen, T.H. Nguyen, T.Q. Gattringer, T. Enzinger, C. Killer-Oberpfalzer, M. Bellante, F. De Blauwe, S. Vanhooren, G. De Raedt, S. Dusart, A. Lemmens, R. Ligot, N. Pierre Rutgers, M. Yperzeele, L. Alexiev, F. Sakelarova, T. Bedeković, M.R. Budincevic, H. Cindric, I. Hucika, Z. Ozretic, D. Saric, M.S. Pfeifer, F. Karpowic, I. Cernik, D. Sramek, M. Skoda, M. Hlavacova, H. Klecka, L. Koutny, M. Vaclavik, D. Skoda, O. Fiksa, J. Hanelova, K. Nevsimalova, M. Rezek, R. Prochazka, P. Krejstova, G. Neumann, J. Vachova, M. Brzezanski, H. Hlinovsky, D. Tenora, D. Jura, R. Jurák, L. Novak, J. Novak, A. Topinka, Z. Fibrich, P. Sobolova, H. Volny, O. Krarup Christensen, H. Drenck, N. Klingenberg Iversen, H. Simonsen, C.Z. Truelsen, T.C. Wienecke, T. Vibo, R. Gross-Paju, K. Toomsoo, T. Antsov, K. Caparros, F. Cordonnier, C. Dan, M. Faucheux, J.-M. Mechtouff, L. Eker, O. Lesaine, E. Ondze, B. Peres, R. Pico, F. Piotin, M. Pop, R. Rouanet, F. Gubeladze, T. Khinikadze, M. Lobjanidze, N. Tsiskaridze, A. Nagel, S. Ringleb, P.A. Rosenkranz, M. Schmidt, H. Sedghi, A. Siepmann, T. Szabo, K. Thomalla, G. Palaiodimou, L. Sagris, D. Kargiotis, O. Klivenyi, P. Szapary, L. Tarkanyi, G. Adami, A. Bandini, F. Calabresi, P. Frisullo, G. Renieri, L. Sangalli, D. Pirson, A. Uyttenboogaart, M. van den Wijngaard, I. Kristoffersen, E.S. Brola, W. Fudala, M. Horoch-Lyszczarek, E. Karlinski, M. Kazmierski, R. Kram, P. Rogoziewicz, M. Kaczorowski, R. Luchowski, P. Sienkiewicz-Jarosz, H. Sobolewski, P. Fryze, W. Wisniewska, A. Wiszniewska, M. Ferreira, P. Ferreira, P. Fonseca, L. Marto, J.P. Pinho E Melo, T. Nunes, A.P. Rodrigues, M. Tedim Cruz, V. Falup-Pecurariu, C. Krastev, G. Mako, M. de Leciñana, M.A. Arenillas, J.F. Ayo-Martin, O. Cruz Culebras, A. Tejedor, E.D. Montaner, J. Pérez-Sánchez, S. Tola Arribas, M.A. Rodriguez Vasquez, A. Mayza, M. Bernava, G. Brehm, A. Machi, P. Fischer, U. Gralla, J. Michel, P.L. Psychogios, M.-N. Strambo, D. Banerjee, S. Krishnan, K. Kwan, J. Butt, A. Catanese, L. Demchuk, A.M. Field, T. Haynes, J. Hill, M.D. Khosravani, H. Mackey, A. Pikula, A. Saposnik, G. Scott, C.A. Shoamanesh, A. Shuaib, A. Yip, S. Barboza, M.A. Barrientos, J.D. Portillo Rivera, L.I. Gongora-Rivera, F. Novarro-Escudero, N. Blanco, A. Abraham, M. Alsbrook, D. Altschul, D. Alvarado-Ortiz, A.J. Bach, I. Badruddin, A. Barazangi, N. Brereton, C. Castonguay, A. Chaturvedi, S. Chaudry, S.A. Choe, H. Choi, J.H. Dharmadhikari, S. Desai, K. Devlin, T.G. Doss, V.T. Edgell, R. Etherton, M. Farooqui, M. Frei, D. Gandhi, D. Grigoryan, M. Gupta, R. Hassan, A.E. Helenius, J. Kaliaev, A. Kaushal, R. Khandelwal, P. Khawaja, A.M. Khoury, N.N. Kim, B.S. Kleindorfer, D.O. Koyfman, F. Lee, V.H. Leung, L.Y. Linares, G. Linfante, I. Lutsep, H.L. Macdougall, L. Male, S. Malik, A.M. Masoud, H. McDermott, M. Mehta, B.P. Min, J. Mittal, M. Morris, J.G. Multani, S.S. Nahab, F. Nalleballe, K. Nguyen, C.B. Novakovic-White, R. Ortega-Gutierrez, S. Rahangdale, R.H. Ramakrishnan, P. Romero, J.R. Rost, N. Rothstein, A. Ruland, S. Shah, R. Sharma, M. Silver, B. Simmons, M. Singh, A. Starosciak, A.K. Strasser, S.L. Szeder, V. Teleb, M. Tsai, J.P. Voetsch, B. Balaguera, O. Pujol Lereis, V.A. Luraschi, A. Almeida, M.S. Cardoso, F.B. Conforto, A. De Deus Silva, L. Varrone Giacomini, L. Oliveira Lima, F. Longo, A.L. Magalhães, P.S.C. Martins, R.T. Mont'alverne, F. Mora Cuervo, D.L. Costa Rebello, L. Valler, L. Zetola, V.F. Lavados, P.M. Navia, V. Olavarría, V.V. Almeida Toro, J.M. Amaya, P.F.R. Bayona, H. Corredor, A. Rivera Ordonez, C.E. Mantilla Barbosa, D.K. Lara, O. Patiño, M.R. Diaz Escobar, L.F. Dejesus Melgarejo Fariña, D.E. Cardozo Villamayor, A. Zelaya Zarza, A.J. Barrientos Iman, D.M. Rodriguez Kadota, L. Campbell, B. Hankey, G.J. Hair, C. Kleinig, T. Ma, A. Tomazini Martins, R. Sahathevan, R. Thijs, V. Salazar, D. Yuan-Hao Wu, T. Haussen, D.C. Liebeskind, D. Yavagal, D.R. Jovin, T.G. Zaidat, O.O. Nguyen, T.N. SVIN COVID-19 Global Stroke Registry SVIN COVID-19 Global Stroke Registry

Abstract

OBJECTIVE: To measure the global impact of COVID-19 pandemic on volumes of IV thrombolysis (IVT), IVT transfers, and stroke hospitalizations over 4 months at the height of the pandemic (March 1 to June 30, 2020) compared with 2 control 4-month periods. METHODS: We conducted a cross-sectional, observational, retrospective study across 6 continents, 70 countries, and 457 stroke centers. Diagnoses were identified by their ICD-10 codes or classifications in stroke databases. RESULTS: There were 91,373 stroke admissions in the 4 months immediately before compared to 80,894 admissions during the pandemic months, representing an 11.5% (95% confidence interval [CI] -11.7 to -11.3, p < 0.0001) decline. There were 13,334 IVT therapies in the 4 months preceding compared to 11,570 procedures during the pandemic, representing a 13.2% (95% CI -13.8 to -12.7, p < 0.0001) drop. Interfacility IVT transfers decreased from 1,337 to 1,178, or an 11.9% decrease (95% CI -13.7 to -10.3, p = 0.001). Recovery of stroke hospitalization volume (9.5%, 95% CI 9.2-9.8, p < 0.0001) was noted over the 2 later (May, June) vs the 2 earlier (March, April) pandemic months. There was a 1.48% stroke rate across 119,967 COVID-19 hospitalizations. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection was noted in 3.3% (1,722/52,026) of all stroke admissions. CONCLUSIONS: The COVID-19 pandemic was associated with a global decline in the volume of stroke hospitalizations, IVT, and interfacility IVT transfers. Primary stroke centers and centers with higher COVID-19 inpatient volumes experienced steeper declines. Recovery of stroke hospitalization was noted in the later pandemic months. © 2021 American Academy of Neurology.

Published
2021

24. Global impact of COVID-19 on stroke care

Author

Nogueira, RG, Abdalkader, M, Qureshi, MM, Frankel, MR, Mansour, OY, Yamagami, H, Qiu, Z, Farhoudi, M, Siegler, JE, Yaghi, S, Raz, E, Sakai, N, Ohara, N, Piotin, M, Mechtouff, L, Eker, O, Chalumeau, V, Kleinig, TJ, Pop, R, Liu, J, Winters, HS, Shang, X, Rodriguez Vasquez, A, Blasco, J, Arenillas, JF, Martinez-Galdamez, M, Brehm, A, Psychogios, M-N, Lylyk, P, Haussen, DC, Al-Bayati, AR, Mohammaden, MH, Fonseca, L, Luis Silva, M, Montalverne, F, Renieri, L, Mangiafico, S, Fischer, U, Gralla, J, Frei, D, Chugh, C, Mehta, BP, Nagel, S, Mohlenbruch, M, Ortega-Gutierrez, S, Farooqui, M, Hassan, AE, Taylor, A, Lapergue, B, Consoli, A, Campbell, BCV, Sharma, M, Walker, M, Van Horn, N, Fiehler, J, Huy, TN, Nguyen, QT, Watanabe, D, Zhang, H, Le, HV, Nguyen, VQ, Shah, R, Devlin, T, Khandelwal, P, Linfante, I, Izzath, W, Lavados, PM, Olavarria, VV, Silva, GS, de Carvalho Sousa, AV, Kirmani, J, Bendszus, M, Amano, T, Yamamoto, R, Doijiri, R, Tokuda, N, Yamada, T, Terasaki, T, Yazawa, Y, Morris, JG, Griffin, E, Thornton, J, Lavoie, P, Matouk, C, Hill, MD, Demchuk, AM, Killer-Oberpfalzer, M, Nahab, F, Altschul, D, Ramos-Pachon, A, Perez de la Ossa, N, Kikano, R, Boisseau, W, Walker, G, Cordina, SM, Puri, A, Kuhn, AL, Gandhi, D, Ramakrishnan, P, Novakovic-White, R, Chebl, A, Kargiotis, O, Czap, A, Zha, A, Masoud, HE, Lopez, C, Ozretic, D, Al-Mufti, F, Zie, W, Duan, Z, Yuan, Z, Huang, W, Hao, Y, Luo, J, Kalousek, V, Bourcier, R, Guile, R, Hetts, S, Al-Jehani, HM, AlHazzani, A, Sadeghi-Hokmabadi, E, Teleb, M, Payne, J, Lee, JS, Hong, JM, Sohn, S-I, Hwang, Y-H, Shin, DH, Roh, HG, Edgell, R, Khatri, R, Smith, A, Malik, A, Liebeskind, D, Herial, N, Jabbour, P, Magalhaes, P, Ozdemir, AO, Aykac, O, Uwatoko, T, Dembo, T, Shimizu, H, Sugiura, Y, Miyashita, F, Fukuda, H, Miyake, K, Shimbo, J, Sugimura, Y, Beer-Furlan, A, Joshi, K, Catanese, L, Abud, DG, Pontes Neto, O, Mehrpour, M, Al Hashmi, A, Saqqur, M, Mostafa, A, Fifi, JT, Hussain, S, John, S, Gupta, R, Sivan-Hoffmann, R, Reznik, A, Sani, AF, Geyik, S, Akil, ECR, Churojana, A, Ghoreishi, A, Saadatnia, M, Sharifipour, E, Ma, A, Faulder, K, Wu, T, Leung, L, Malek, A, Voetsch, B, Wakhloo, A, Rivera, R, Barrientos Iman, DM, Pikula, A, Lioutas, V-A, Thomalla, G, Birnbaum, L, Machi, P, Bernava, G, McDermott, M, Kleindorfer, D, Wong, K, Patterson, MS, Fiorot, JA, Huded, V, Mack, W, Tenser, M, Eskey, C, Multani, S, Kelly, M, Janardhan, V, Cornett, O, Singh, V, Murayama, Y, Mokin, M, Yang, P, Zhang, X, Yin, C, Han, H, Peng, Y, Chen, W, Crosa, R, Frudit, ME, Pandian, JD, Kulkarni, A, Yagita, Y, Takenobu, Y, Matsumaru, Y, Yamada, S, Kono, R, Kanamaru, T, Yamazaki, H, Sakaguchi, M, Todo, K, Yamamoto, N, Sonoda, K, Yoshida, T, Hashimoto, H, Nakahara, I, Cora, E, Volders, D, Ducroux, C, Shoamanesh, A, Ospel, J, Kaliaev, A, Ahmed, S, Rashid, U, Rebello, LC, Pereira, VM, Fahed, R, Chen, M, Sheth, SA, Palaiodimou, L, Tsivgoulis, G, Chandra, R, Koyfman, F, Leung, T, Khosravani, H, Dharmadhikari, S, Frisullo, G, Calabresi, P, Tsiskaridze, A, Lobjanidze, N, Grigoryan, M, Czlonkowska, A, de Sousa, DA, Demeestere, J, Liang, C, Sangha, N, Lutsep, HL, Ayo-Martin, O, Cruz-Culebras, A, Tran, AD, Young, CY, Cordonnier, C, Caparros, F, Alonso De Lecinana, M, Fuentes, B, Yavagal, D, Jovin, T, Spelle, L, Moret, J, Khatri, P, Zaidat, O, Raymond, J, Martins, S, Thanh, N, Nogueira, RG, Abdalkader, M, Qureshi, MM, Frankel, MR, Mansour, OY, Yamagami, H, Qiu, Z, Farhoudi, M, Siegler, JE, Yaghi, S, Raz, E, Sakai, N, Ohara, N, Piotin, M, Mechtouff, L, Eker, O, Chalumeau, V, Kleinig, TJ, Pop, R, Liu, J, Winters, HS, Shang, X, Rodriguez Vasquez, A, Blasco, J, Arenillas, JF, Martinez-Galdamez, M, Brehm, A, Psychogios, M-N, Lylyk, P, Haussen, DC, Al-Bayati, AR, Mohammaden, MH, Fonseca, L, Luis Silva, M, Montalverne, F, Renieri, L, Mangiafico, S, Fischer, U, Gralla, J, Frei, D, Chugh, C, Mehta, BP, Nagel, S, Mohlenbruch, M, Ortega-Gutierrez, S, Farooqui, M, Hassan, AE, Taylor, A, Lapergue, B, Consoli, A, Campbell, BCV, Sharma, M, Walker, M, Van Horn, N, Fiehler, J, Huy, TN, Nguyen, QT, Watanabe, D, Zhang, H, Le, HV, Nguyen, VQ, Shah, R, Devlin, T, Khandelwal, P, Linfante, I, Izzath, W, Lavados, PM, Olavarria, VV, Silva, GS, de Carvalho Sousa, AV, Kirmani, J, Bendszus, M, Amano, T, Yamamoto, R, Doijiri, R, Tokuda, N, Yamada, T, Terasaki, T, Yazawa, Y, Morris, JG, Griffin, E, Thornton, J, Lavoie, P, Matouk, C, Hill, MD, Demchuk, AM, Killer-Oberpfalzer, M, Nahab, F, Altschul, D, Ramos-Pachon, A, Perez de la Ossa, N, Kikano, R, Boisseau, W, Walker, G, Cordina, SM, Puri, A, Kuhn, AL, Gandhi, D, Ramakrishnan, P, Novakovic-White, R, Chebl, A, Kargiotis, O, Czap, A, Zha, A, Masoud, HE, Lopez, C, Ozretic, D, Al-Mufti, F, Zie, W, Duan, Z, Yuan, Z, Huang, W, Hao, Y, Luo, J, Kalousek, V, Bourcier, R, Guile, R, Hetts, S, Al-Jehani, HM, AlHazzani, A, Sadeghi-Hokmabadi, E, Teleb, M, Payne, J, Lee, JS, Hong, JM, Sohn, S-I, Hwang, Y-H, Shin, DH, Roh, HG, Edgell, R, Khatri, R, Smith, A, Malik, A, Liebeskind, D, Herial, N, Jabbour, P, Magalhaes, P, Ozdemir, AO, Aykac, O, Uwatoko, T, Dembo, T, Shimizu, H, Sugiura, Y, Miyashita, F, Fukuda, H, Miyake, K, Shimbo, J, Sugimura, Y, Beer-Furlan, A, Joshi, K, Catanese, L, Abud, DG, Pontes Neto, O, Mehrpour, M, Al Hashmi, A, Saqqur, M, Mostafa, A, Fifi, JT, Hussain, S, John, S, Gupta, R, Sivan-Hoffmann, R, Reznik, A, Sani, AF, Geyik, S, Akil, ECR, Churojana, A, Ghoreishi, A, Saadatnia, M, Sharifipour, E, Ma, A, Faulder, K, Wu, T, Leung, L, Malek, A, Voetsch, B, Wakhloo, A, Rivera, R, Barrientos Iman, DM, Pikula, A, Lioutas, V-A, Thomalla, G, Birnbaum, L, Machi, P, Bernava, G, McDermott, M, Kleindorfer, D, Wong, K, Patterson, MS, Fiorot, JA, Huded, V, Mack, W, Tenser, M, Eskey, C, Multani, S, Kelly, M, Janardhan, V, Cornett, O, Singh, V, Murayama, Y, Mokin, M, Yang, P, Zhang, X, Yin, C, Han, H, Peng, Y, Chen, W, Crosa, R, Frudit, ME, Pandian, JD, Kulkarni, A, Yagita, Y, Takenobu, Y, Matsumaru, Y, Yamada, S, Kono, R, Kanamaru, T, Yamazaki, H, Sakaguchi, M, Todo, K, Yamamoto, N, Sonoda, K, Yoshida, T, Hashimoto, H, Nakahara, I, Cora, E, Volders, D, Ducroux, C, Shoamanesh, A, Ospel, J, Kaliaev, A, Ahmed, S, Rashid, U, Rebello, LC, Pereira, VM, Fahed, R, Chen, M, Sheth, SA, Palaiodimou, L, Tsivgoulis, G, Chandra, R, Koyfman, F, Leung, T, Khosravani, H, Dharmadhikari, S, Frisullo, G, Calabresi, P, Tsiskaridze, A, Lobjanidze, N, Grigoryan, M, Czlonkowska, A, de Sousa, DA, Demeestere, J, Liang, C, Sangha, N, Lutsep, HL, Ayo-Martin, O, Cruz-Culebras, A, Tran, AD, Young, CY, Cordonnier, C, Caparros, F, Alonso De Lecinana, M, Fuentes, B, Yavagal, D, Jovin, T, Spelle, L, Moret, J, Khatri, P, Zaidat, O, Raymond, J, Martins, S, and Thanh, N

Abstract

BACKGROUND: The COVID-19 pandemic led to profound changes in the organization of health care systems worldwide. AIMS: We sought to measure the global impact of the COVID-19 pandemic on the volumes for mechanical thrombectomy, stroke, and intracranial hemorrhage hospitalizations over a three-month period at the height of the pandemic (1 March-31 May 2020) compared with two control three-month periods (immediately preceding and one year prior). METHODS: Retrospective, observational, international study, across 6 continents, 40 countries, and 187 comprehensive stroke centers. The diagnoses were identified by their ICD-10 codes and/or classifications in stroke databases at participating centers. RESULTS: The hospitalization volumes for any stroke, intracranial hemorrhage, and mechanical thrombectomy were 26,699, 4002, and 5191 in the three months immediately before versus 21,576, 3540, and 4533 during the first three pandemic months, representing declines of 19.2% (95%CI, -19.7 to -18.7), 11.5% (95%CI, -12.6 to -10.6), and 12.7% (95%CI, -13.6 to -11.8), respectively. The decreases were noted across centers with high, mid, and low COVID-19 hospitalization burden, and also across high, mid, and low volume stroke/mechanical thrombectomy centers. High-volume COVID-19 centers (-20.5%) had greater declines in mechanical thrombectomy volumes than mid- (-10.1%) and low-volume (-8.7%) centers (p < 0.0001). There was a 1.5% stroke rate across 54,366 COVID-19 hospitalizations. SARS-CoV-2 infection was noted in 3.9% (784/20,250) of all stroke admissions. CONCLUSION: The COVID-19 pandemic was associated with a global decline in the volume of overall stroke hospitalizations, mechanical thrombectomy procedures, and intracranial hemorrhage admission volumes. Despite geographic variations, these volume reductions were observed regardless of COVID-19 hospitalization burden and pre-pandemic stroke/mechanical thrombectomy volumes.

Published
2021

30. High-pressure phase diagrams of FeSe1−xTex: correlation between suppressed nematicity and enhanced superconductivity

Author

Mukasa, K., primary, Matsuura, K., additional, Qiu, M., additional, Saito, M., additional, Sugimura, Y., additional, Ishida, K., additional, Otani, M., additional, Onishi, Y., additional, Mizukami, Y., additional, Hashimoto, K., additional, Gouchi, J., additional, Kumai, R., additional, Uwatoko, Y., additional, and Shibauchi, T., additional

Published
2021
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