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Survival after Aortic Valve Replacement for Aortic Regurgitation: Prediction from Preoperative Contractility Measurement.
Cardiology
October 2019
Department of Cardiothoracic Surgery, Weill Medical College of Cornell University, New York, New York, USA.
Background: Noninvasive measurement of myocardial contractility (end-systolic wall stress-adjusted change in left ventricular ejection fraction from rest to exercise [ΔLVEF - ΔESS]) predicts heart failure, subnormal LVEFrest, and sudden death in asymptomatic patients with chronic severe aortic regurgitation (AR). Here we assess the relation of preoperative ΔLVEF - ΔESS to survival after aortic valve replacement (AVR).
Methods: Patients who underwent AVR for chronic, isolated, pure severe AR (n = 66) were followed for 13.
Restrictive mitral annuloplasty with or without surgical ventricular restoration in ischemic dilated cardiomyopathy with severe mitral regurgitation.
Circulation
September 2011
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Background: We assessed changes in left ventricular (LV) volume and function and in regional myocardial wall stress in noninfarcted segments after restrictive mitral annuloplasty (RMA) with or without surgical ventricular restoration (SVR).
Methods And Results: Thirty-nine patients with ischemic cardiomyopathy (ejection fraction ≤ 0.35) and severe mitral regurgitation (≥ 3) were studied before and 2.
Gender-based differences in the functional deformation of the foot longitudinal arch.
Foot (Edinb)
March 2012
Graduate School of Sport Sciences, Waseda University, Sport Orthopedics Lab, 2-579-15 Mikajima, Tokorozawa, Saitama 359-0025, Japan.
Background: Gender differences in physical characteristics are associated with differing incidences of sports-related injuries. However, functional differences in the foot arch, which acts as a shock absorber under dynamic conditions, have not been investigated.
Objective: This study investigated gender-based differences in the medial and lateral longitudinal arches under static and dynamic conditions.
Mechanism of beneficial effects of restrictive mitral annuloplasty in patients with dilated cardiomyopathy and functional mitral regurgitation.
Circulation
September 2010
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
Background: Restrictive mitral annuloplasty (RMA) often leads to reverse left ventricular (LV) remodeling in patients with advanced cardiomyopathy and functional mitral regurgitation. However, the mechanism responsible for its favorable effects on LV ejection performance has been poorly understood. We evaluated systolic wall stress using cineangiographic multidetector computed tomography (MDCT) and our developed software system to assess stress-shortening relations before and after RMA.
View Article and Find Full Text PDFAssessment of regional myocardial wall stress before and after surgical correction of functional ischaemic mitral regurgitation using multidetector computed tomography and novel software system.
Eur J Cardiothorac Surg
August 2010
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Objectives: The objective of this study was to assess changes in left ventricular (LV) volume, function and regional myocardial wall stress in non-infarcted segments following restrictive mitral annuloplasty (RMA) in patients with ischaemic cardiomyopathy (ICM) and severe functional mitral regurgitation (MR).
Patients And Methods: Twenty-two patients with ICM (ejection fraction <35%) and severe MR were investigated before and 3 months after RMA using cine-angiographic multidetector row computed tomography (cine-MDCT). For comparative purposes, 38 normal subjects were also studied.
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