نتایج جستجو برای: systole
تعداد نتایج: 3046 فیلتر نتایج به سال:
INTRODUCTION In functional mitral regurgitation (FMR), effective regurgitant orifice area (EROA) displays a dynamic pattern. The impact of dynamic changes of annulus dysfunction and leaflets tenting on phasic EROA was explored with real-time three-dimensional transesophageal echocardiography (RT3D-TEE). METHODS RT3D-TEE was performed in 52 FMR patients and 30 controls. Mitral annulus dimensio...
We traced left ventricular contours, frame-by-frame throughout systole and diastole, of normal sinus beats from 30 degrees right anterior oblique ventriculograms from 32 normal patients. We separated both systole and diastole into 19 equal time intervals each and calculated regional lengths (R), normalized by both end-diastole length and relative time interval (T) in systole and diastole and di...
Abstract Funding Acknowledgements Type of funding sources: None. Background Trans-catheter mitral valve replacement (TMVR) procedures had emerged as an alternative solution for patients who have surgical high risk surgery. One the main challenges faced during percutaneous approach is degree left ventricular outflow tract (LVOT) narrowing after implanting new prosthesis. The remaining LVOT area ...
Results Two of the original 46 volunteers were excluded due to ECG irregularities. Data from one further volunteer was incomplete and therefore excluded from the final analysis. Results from the remaining 43 volunteers are in table 1. Global FA was higher in diastole than systole (0.56 v 0.47; p < 0.001). The global endocardial HA was significantly more right-handed in systole than diastole (34...
The duration of the various phases of left ventricular systole has been measured in a series of So normal subjects using high speed simultaneous recordings of the electrocardiogram, the phonocardiogram, the carotid pulse, and the apex cardiogram. The five phases of systole measured were: total electromechanical systole (Q-A2 interval); left ventricular ejection time (LVET); pre-ejection period ...
Background Increased left atrial (LA) size measured at left ventricular (LV) end systole is associated with cardiovascular morbidity and mortality in population based studies. LA function can be divided into 3 components: LA filling during LV systole, a passive emptying phase during early diastole and active atrial systole during LV late diastole. We sought to assess the relationships of LA vol...
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