نتایج جستجو برای: lv diastolic function
تعداد نتایج: 1247696 فیلتر نتایج به سال:
Surgical ventricular restoration (SVR) was designed to treat patients with aneurysms or large akinetic walls and dilated ventricles. Yet, crucial aspects essential to the efficacy of this procedure like optimal shape and size of the left ventricle (LV) are still debatable. The objective of this study is to quantify the efficacy of SVR based on LV regional shape in terms of curvedness, wall stre...
AIMS Early diastolic mitral annular velocity (e') obtained by tissue Doppler imaging (TDI) is widely used to evaluate left ventricular (LV) diastolic function based on the assumption that it reflects myocardial relaxation in the long-axis direction. In this study, we aimed to determine whether or not e' truly reflects early diastolic longitudinal myocardial relaxation, and which is the most use...
AIMS The aim of our study was to evaluate the influence of left ventricular (LV) diastolic filling impairment on postoperative results in patients (pts) with low LV ejection fraction (EF) (<35%) undergoing coronary artery bypass grafting (CABG). METHODS The study covered 56 patients (mean age 58.9 +/- 17.1 years). Two dimensional Doppler echocardiographic investigations were performed pre- an...
Current knowledge on the pathogenesis of diastolic heart failure predominantly rests on case-control studies involving symptomatic patients with preserved ejection fraction and relying on invasive diagnostic procedures including endomyocardial biopsy. Our objective was to gain insight in serum and urinary biomarkers reflecting collagen turnover and associated with asymptomatic diastolic LV dysf...
Background. Mitral regurgitation (MR) causes an augmentation in left ventricular (LV) diastolic function, increasing early diastolic filling rate and decreasing LV stiffness. Whether these changes in diastolic function persist, return to normal, or become abnormal after mitral valve replacement (MVR) is unknown. Methods and Results. Simultaneous LV echocardiography and catheterization studies w...
....................................................................................................... 1 POPULÄRVETENSKAPLIG SAMMANFATTNING ................................. 3 LIST OF ORIGINAL PAPERS ........................................................................ 5 ABBREVIATIONS ............................................................................................. 6 INTRODUCTIO...
Left ventricular (LV) diastolic function in the absence and presence of regional ischemia was examined in eight conscious dogs chronically instrumented with ultrasonic devices for measuring LV wall thickness and volume. During treadmill exercise, ischemia was induced (hydraulic occluder) to produce less than 10% systolic wall thickening in the ischemic zone. LV filling was assessed by the peak ...
OBJECTIVES The aim of the study was to evaluate whether left ventricular (LV) mechanics are better under LV-based pacing than under right ventricular (RV) apical pacing in patients with permanent atrial fibrillation (AF) after atrioventricular junction (AVJ) ablation. BACKGROUND "Ablate and pace" is an acceptable therapy for drug-refractory AF. However, the RV apical stimulation commonly used...
BACKGROUND Ventricular hypertrophy begins as a physiological adaptation to cardiac overload but progresses to a pathological state. We examined whether the extent of hypertrophy influenced the response to exercise in terms of its effects on regional and global ventricular function and transmural myocardial blood flow distribution. METHODS AND RESULTS Left ventricular (LV) hypertrophy was indu...
Left ventricular (LV) diastolic function during atrial fibrillation (AF) remains poorly understood due to the complex interaction of factors and beat-to-beat variability. The purpose of the present study was to elucidate the physiological determinants of beat-to-beat changes in LV diastolic function during AF. The RR intervals preceding a given cardiac beat were measured from the right ventricu...
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