Search

Copyright of Turkiye Klinikleri Journal of Dermatology is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

New Findings: What is the central question of this study? Common carotid artery (CCA) two‐dimensional strain imaging detects intrinsic arterial wall properties beyond conventional measures of arterial stiffness, but the effect of cardiorespiratory fitness on two‐dimensional strain‐derived indices of CCA stiffness is unknown. What is the main finding and its importance? Two‐dimensional strain imaging of the CCA revealed greater peak circumferential strain and systolic strain rate in highly fit men compared with their less fit counterparts. Altered CCA wall mechanics might reflect intrinsic training‐induced adaptations that help to buffer the increase in pulse pressure and stroke volume during exercise. Abstract: The influence of cardiorespiratory fitness on arterial stiffness in young adults remains equivocal. Beyond conventional measures of arterial stiffness, two‐dimensional strain imaging of the common carotid artery (CCA) provides new information related to the intrinsic properties of the arterial wall. Therefore, the aim of this study was to assess the effect of cardiorespiratory fitness on both conventional indices of CCA stiffness and two‐dimensional strain parameters, at rest and after a bout of aerobic exercise in young, healthy men. Short‐axis ultrasound images of the CCA were recorded in 34 healthy men {22 years old [95% confidence interval (CI), 19, 22]} before and immediately after 5 min of aerobic exercise (40% of maximal oxygen consumption). Images were analysed for arterial diameter, peak circumferential strain (PCS) and peak systolic and diastolic strain rates (S‐SR and D‐SR). Heart rate, systolic and diastolic blood pressure were simultaneously assessed, and Peterson's elastic modulus (Ep) and β‐stiffness (β1) were calculated. Participants were separated post hoc into moderate‐ and high‐fitness groups [maximal oxygen consumption, 48.9 (95% CI, 44.7, 53.2) versus 65.6 ml kg−1 min−1 (95% CI, 63.1, 68.1), respectively; P < 0.001]. The Ep and β1 were similar between groups at baseline (P > 0.13) but were elevated in the moderate‐fitness group postexercise (P < 0.04). The PCS and S‐SR were elevated in the high‐fitness group at both time points [3.0% (95% CI, 1.2, 4.9), P = 0.002, and 0.401 s−1 (95% CI, 0.085, 0.72), P = 0.02, respectively]. No group differences were observed in CCA heart rate, systolic or diastolic blood pressure or D‐SR throughout the protocol (P > 0.05). Highly fit individuals exhibit elevated CCA, PCS and S‐SR, which might reflect training‐induced adaptations that help to buffer the increase in pulse pressure and stroke volume during exercise. [ABSTRACT FROM AUTHOR]

Aims Transcatheter aortic valve implantation ( TAVI) is an alternative treatment in surgically high-risk or inoperable patients with severe aortic stenosis ( AS). The objective of this study was to analyze the effects of TAVI on left ventricular ( LV) and left atrial ( LA) longitudinal function assessed by speckle tracking echocardiography (2 DSTE) in patients with AS. Methods In our prospectively conducted study, a total of 55 symptomatic ( New York Heart Association class II or higher) patients with severe AS, considered to be at increased risk for undergoing surgical aortic valve replacement, were recruited (age: 78.6 ± 7.4 year). Patients underwent a complete clinical and laboratory evaluation, in addition to standard echocardiography and 2 DSTE. Echocardiographic analysis was performed before and 6 months after TAVI. 2 DSTE measured segmental and global longitudinal strain ( GLS) and radial strain. Results All the patients received the CoreValve self-expanding prosthesis. Six months after TAVI, patients showed a significant reduction in mean transaortic gradient (52.1 ± 15.8 vs. 11.2 ± 3.3 mmHg, P < 0.0001), LV mass, LA volume index, and an improvement of ejection fraction (P < 0.0001). In addition, LV GLS (−11.8 ± 3.2 vs. −16.3 ± 4.2%; P < 0.0001) and LA longitudinal strain (14.2 ± 5.4 vs. 26.6 ± 10.8%, P < 0.0001) significantly increased after TAVI. In a stepwise forward multiple logistic regression analysis, LV mass before TAVI (P < 0.001) and peak CK MB mass after TAVI (P < 0.0001) were powerful independent predictors of lower improvement of LV GLS. Moreover, LV mass index (P < 0.001) and LV GLS strain (P < 0.001) before TAVI were powerful independent predictor of LA longitudinal strain after TAVI Conclusions TAVI in patients with AS resulted in geometric changes known as 'reverse remodelling,' and improved LV and LA function assessed by 2 DSTE. [ABSTRACT FROM AUTHOR]

Aims To investigate the prognostic impact of left-ventricular (LV) cardiac magnetic resonance (CMR) deformation imaging in patients with non-ischaemic dilated cardiomyopathy (DCM) compared with late-gadolinium enhancement (LGE) quantification and LV ejection fraction (EF). Methods and results A total of 210 subjects with DCM were examined prospectively with standard CMR including measurement of LGE for quantification of myocardial fibrosis and feature tracking strain imaging for assessment of LV deformation. The predefined primary endpoint, a combination of cardiac death, heart transplantation, and aborted sudden cardiac death, occurred in 26 subjects during the median follow-up period of 5.3 years. LV radial, circumferential, and longitudinal strains were significantly associated with outcome. Using separate multivariate analysis models, global longitudinal strain (average of peak negative strain values) and mean longitudinal strain (negative peak of the mean curve of all segments) were independent prognostic parameters surpassing the value of global and mean LV radial and circumferential strain, as well as NT-pro BNP, EF, and LGE mass. A global longitudinal strain greater than –12.5% predicted outcome even in patients with EF < 35%(P < 0.01) and in those with presence of LGE (P < 0.001). Mean longitudinal strain was further investigated using a clinical model with predefined cut-offs (EF < 35%, presence of LGE, NYHA class, mean longitudinal strain greater than –10%). Mean longitudinal strain exhibited an independent prognostic value surpassing that provided by NYHA, EF, and LGE (HR = 5.4, P < 0.01). Conclusion LV longitudinal strain assessed with CMR is an independent predictor of survival in DCM and offers incremental information for risk stratification beyond clinical parameters, biomarker, and standard CMR. [ABSTRACT FROM AUTHOR]

Aims Mitral annular (MA) displacement reflects longitudinal left ventricular (LV) deformation and systolic velocity measurements reflect the rate of contraction; both are valuable in the diagnosis and prognosis of cardiac disease. The aim of this study was to test the agreement and reproducibility between motion mode (M-mode), colour tissue Doppler imaging (TDI), and two-dimensional strain imaging (2DSI) when measuring MA displacement and systolic velocity. Methods and results Using GE Healthcare Vivid 7 and E9 and Echopac BT11 software, MA displacement and velocity measurements by 2DSI, TDI, and M-mode determined in the septal and lateral walls in the apical four-chamber view were assessed in 50 control subjects and in 168 patients with various cardiac anomalies known to affect longitudinal displacement such as heart failure, mitral regurgitation, LV hypertrophy, and LV dilation. Intra- and inter-observer variability were tested using the Bland–Altman method in 125 patients. A relatively low bias between M-mode and TDI with respect to MA displacement (mean difference ± 1.96 standard deviation: 0.08 ± 0.35 cm) and a low bias between TDI and 2DSI with respect to MA peak systolic velocity (−0.13 ± 1.87 cm/s) were found. Reproducibility was acceptable for all methods with TDI having the lowest intra- and inter-observer variability. Conclusion LV function could be assessed in terms of MA displacement and systolic velocity using M-mode, TDI, and 2DSI. None of the measurement techniques are, however, interchangeable. Overall, TDI seems to be the most robust method, having the lowest observer variability. [ABSTRACT FROM PUBLISHER]

The recent development of 2-dimensional strain (2D strain) imaging can provide a powerful alternative for assessing left ventricular (LV) torsion. This study was conducted to evaluate the global and regional left ventricular twist by 2D strain in patients with anterior wall myocardial infarction (AMI). A total of 55 AMI patients were divided into two groups according to their ejection fraction (EF) values (group A: LVEF ⩾ 50%; group B: LVEF < 50%), and 35 normal people served as the control group. Using 2-dimensional strain software, global and regional LV rotation and displacement were obtained at two planes. Compared with the control group, patients of group A showed reduced peak LV twist of the anterior and anterior-septal wall (9.26±1.89 vs 10.74±2.67; 9.71±1.71 vs 11.36±2.29, both P < 0.05), but the radial displacement and global twist were maintained ( P > 0.05). Differently, regional and global LV twist and radial displacement in patients of group B deceased significantly, especially in the anterior and anterior-septal wall, as compared with patients in the control or group A (both P < 0.05). Moreover, a strong correlation was noted between peak twist and radial displacement; the twist-displacement loop was markedly distorted in patients of group B. This study demonstrated that 2D strain has a potential ability for quantification of left ventricular global and segment twist and radial displacement in patients with coronary artery disease. [ABSTRACT FROM AUTHOR]

Aims: To evaluate right atrial (RA) morphology and deformation in patients with dilated cardiomyopathy (DCM). [ABSTRACT FROM PUBLISHER]

Objective: In dilated cardiomyopathy (DCM), right ventricular (RV) dysfunction has been reported and attributed both to altered loading conditions and to RV involvement in the myopathic process. The aim of the study was to detect RV myocardial function in DCM using two-dimensional (2D) strain echocardiography and to assess the effects of cardiac resynchronization therapy (CRT) on RV myocardial strain during a 6-month follow-up. Methods and Results: A total of 110 patients (mean age: 55.4 ± 11.2 years) with either idiopathic (n = 60) or ischemic (n = 50) DCM, without overt clinical signs of RV failure, underwent standard echo and 2D strain analysis of RV longitudinal strain in RV septal and lateral walls. The two groups were comparable for clinical variables (New York Heart Association class III in 81.8%). Left ventricular volumes, ejection fraction, stroke volume, and mitral valve effective regurgitant orifice were similar between the two groups. No significant differences were evidenced in Doppler mitral and tricuspid inflow measurements. RV diameters were mildly increased in patients with idiopathic DCM, while RV tricuspid annulus systolic excursion and Tei-index were comparable between the two groups. RV global longitudinal strain and regional peak myocardial strain were significantly impaired in patients with idiopathic DCM compared with those having ischemic DCM (all P < 0.001). Using left ventricular end-systolic volume as marker for response to CRT, 70 patients (63.3%) were long-term responders. Ischemic DCM patient responders to CRT showed a significant improvement in RV peak systolic strain. Conversely, in patients with idiopathic DCM and in ischemic patients nonresponders to CRT, no improvement in RV function was evidenced. By multivariable analysis, in the overall population, ischemic etiology of DCM (P < 0.0001), positive response to CRT (P < 0.001), and longitudinal intraventricular dyssynchrony (P <0.01) emerged as the only independent determinants of RV global longitudinal strain after CRT. Conclusions: Two-dimensional strain represents a promising noninvasive technique to assess RV myocardial function in patients with DCM. RV myocardial deformation at baseline and after CRT are more impaired in idiopathic compared with ischemic DCM patients. Future longitudinal studies are warranted to understand the natural history of RV myocardial function, the extent of reversibility of RV dysfunction with CRT, and the possible prognostic impact of such indexes in patients with congestive heart failure. [ABSTRACT FROM AUTHOR]

Aims: To evaluate whether quantification of the extent of scarred left ventricular (LV) tissue by speckle-tracking strain echo (2DSE) can predict response to cardiac resynchronization therapy (CRT) in patients with ischaemic dilated cardiomyopathy (DCM). [ABSTRACT FROM PUBLISHER]

Two-dimensional echocardiography has historically played a limited role in the diagnosis of acute myocarditis because of a lack of specific diagnostic features. The emergence of novel echocardiographic modalities such as strain and myocardial perfusion imaging have greatly augmented the scope of echocardiography, permitting the assessment of myocardial contractility, blood flow, and microvascular integrity. However, the application of these cutting-edge techniques in the diagnosis of acute myocarditis is still at a nascent stage. We present a case of acute myocarditis where echo-based strain imaging/mapping and real-time myocardial contrast echocardiography enabled the detection of regional contractile and perfusion abnormalities, not otherwise apparent with conventional echocardiography. These findings and the final diagnosis were later confirmed by cardiac magnetic resonance imaging. This case highlights the potential utility of novel echocardiographic techniques in the diagnostic workup of acute myocarditis and underscores the need for prospective studies to assess the sensitivity and specificity of these newer technologies. To our knowledge, this is the first report of a multimodality echocardiographic approach towards the diagnosis of myocarditis. [ABSTRACT FROM PUBLISHER]