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1. Anatomical cardiac and electrocardiographic axes correlate in both upright and supine positions: an upright/supine CT study

Author

Togo Norimatsu, Takehiro Nakahara, Yoshitake Yamada, Yoichi Yokoyama, Minoru Yamada, Keiichi Narita, and Masahiro Jinzaki

Subjects
Medicine, Science
Abstract

Abstract The correlation between the anatomical cardiac and electrocardiographic axes has been discussed for several years. Using upright computed tomography, this study aimed to reveal the relationship between the anatomical cardiac and electrocardiographic axes in both the supine and upright positions. Upright CT and standard supine CT were performed for healthy volunteers, following electrocardiography in both upright and supine position. On CT images, the coordinates of apex, the center of aortic valve (AV) and mitral valve (MV) were recorded, and the vectors and angles were calculated. Subcutaneous and visceral fat volume were semi-automatically calculated in a workstation. From a total 190 volunteers, 41 males were performed electrocardiography and included for this study. The QRS and anatomical axes (AV-apex and MV-apex axis) were significantly correlated in both supine and upright positions, while the angle of the AV-apex to Z axis was the most correlated (supine: r = − 0.54, p = 0.0002, upright: r = − 0.47, p = 0.0020). The anatomical axis moved in the dorsal and caudal directions from the supine to upright position. Multiple regression analysis revealed that the anatomical axis from the AV-apex to the Z-axis was determined according to age, body height, subcutaneous and visceral fat volumes.

Published
2023
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3. Two-Year Results of a Multicenter Prospective Observational Study of the Zenith Spiral-Z Limb Deployed in the External Iliac Artery During Endovascular Aneurysm Repair

Author

Hideaki Obara, Mamoru Arakawa, Tsuyoshi Shibata, Tadashi Furuyama, Hideki Ueda, Hidetoshi Uchiyama, Takayuki Uchida, Hiroshi Masuhara, Terutoshi Yamaoka, Eiichi Teshima, Togo Norimatsu, Kenjiro Kaneko, Noriyasu Morikage, Naoki Fujimura, Seiji Onitsuka, Tomohiro Imazuru, and Hitoshi Matsumura

Subjects
Male, medicine.medical_specialty, medicine.medical_treatment, 030204 cardiovascular system & hematology, Prosthesis Design, Iliac Artery, Endovascular aneurysm repair, Blood Vessel Prosthesis Implantation, 03 medical and health sciences, 0302 clinical medicine, Japan, Risk Factors, medicine.artery, Occlusion, medicine, Humans, Prospective Studies, 030212 general & internal medicine, Prospective cohort study, Spiral, Aged, Aged, 80 and over, business.industry, Endovascular Procedures, Graft Occlusion, Vascular, Stent, External iliac artery, Aortic Valve Stenosis, General Medicine, medicine.disease, Abdominal aortic aneurysm, Blood Vessel Prosthesis, Surgery, body regions, Treatment Outcome, Female, Stents, Observational study, Cardiology and Cardiovascular Medicine, business, Aortic Aneurysm, Abdominal, Follow-Up Studies
Abstract

Background Limited data is available on the use of a polyester graft limb with a helical stent configuration deployed in the external iliac artery (EIA) during endovascular aneurysm repair (EVAR), so we prospectively analyzed the efficacy of the Zenith Spiral-Z limb deployed in the EIA.Methods and Results:Patients undergoing EVAR using a Zenith stent-graft and Spiral-Z limb deployed in the EIA were prospectively registered in 24 Japanese institutions from June 2017 to November 2017. In total, 65 patients (74 limbs) (mean age: 77.1±8.0 years, 87.7% men, mean abdominal aortic aneurysm (AAA) diameter: 51.9±7.2 mm, mean iliac artery aneurysm (IAA) diameter: 38.3±10.0 mm) were registered and followed up. The most common reason for deployment in the EIA was a common IAA (43 limbs, 58.1%), and 8 limbs (10.8%) had a bare nitinol stent placed at the Spiral-Z limb. A total of 61 patients (70 limbs) completed a 24-month follow-up. There were 2 Spiral-Z limb stenoses and 1 occlusion, leading to a primary patency of 95.5% and a secondary patency of 100%, at 24 months. Buttock claudication occurred in 24.3% of the limbs treated at 1 month but decreased to 4.3% at 24 months. Conclusions Our multicenter prospective study showed that Spiral-Z limb deployed in the EIA was associated with satisfactory results and seems to be a durable option, even in the era of iliac branch devices.

Published
2020
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5. Surgical Repair for Popliteal Venous Aneurysm Causing Severe or Recurrent Pulmonary Thromboembolism: Three Case Reports

Author

Togo Norimatsu and Haruo Aramoto

Subjects
Surgical repair, medicine.medical_specialty, Duplex ultrasonography, integumentary system, medicine.diagnostic_test, business.industry, Case Report, Computed tomography, General Medicine, medicine.disease, Venous aneurysm, Surgery, Venous thrombosis, medicine, Thrombus, business, After treatment
Abstract

Poplitealvenous aneurysms (PVA) are associated with deep venous thrombosis and recurrentpulmonary thromboembolism (PE). We report three cases of PVA. In all three patients the first sign of PVA was acute PE; in one case, the PE was recurrent. Computed tomography and duplex ultrasonography revealed not only PE but also popliteal venous dilatation with thrombus. Surgical reconstruction was performed in each case after treatment for PE. No postoperative complications occurred, including recurrent PE. Surgical repair of PVA is safe and is a recommended treatment.

Published
2015
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