منابع مشابه
Determination of left ventricular size and shape.
• The importance of ventricular size and shape in determining cardiac function has been recognized for over 80 years; the concept is embodied in the Frank-Starling mechanism and in Laplace's law of the heart. However, over this same period, chamber pressure and cardiac output rather than ventricular dimensions have been measured to assess cardiac function, largely because cardiac catheterizatio...
متن کاملLeft-ventricular shape determines intramyocardial mechanical heterogeneity.
Left-ventricular remodeling is considered to be an important mechanism of disease progression leading to mechanical dysfunction of the heart. However, the interaction between the physiological changes in the remodeling process and the associated mechanical dysfunction is still poorly understood. Clinically, it has been observed that the left ventricle often undergoes large shape changes, but th...
متن کاملEffects of Surgical Ventricular Restoration on Left Ventricular Shape, Size, and Function for Left Ventricular Anterior Aneurysm
BACKGROUND Surgical ventricular restoration (SVR) has been performed to treat left ventricular (LV) aneurysm. However, there is limited analysis of changes in LV shape. This study aimed to evaluate the changes in LV shape induced by SVR and the effects of SVR on LV size and function for LV aneurysm. METHODS Between April 2006 and March 2015, 18 patients with dyskinetic (dyskinetic group) and ...
متن کاملContinuous assessment of left ventricular shape in man.
Frame by frame analysis of left ventriculograms has been performed in 10 normal subjects and 40 patients with heart disease. Left ventricular shape index was derived as 4 pi (cavity area)/(perimeter)2, which has a maximum value of 1 when the outline is circular. In normal subjects systole was always associated with progressive reduction in shape index, indicating that the cavity projection had ...
متن کاملInfluence of cardiac shape on left ventricular twist.
The dynamic interaction between subendocardial and subepicardial fibre helices in the left ventricle (LV) leads to a twisting deformation, which has an important role in LV function. This study sought to assess the influence of cardiac shape on LV twist in the normal and dilated human heart. The study comprised 45 dilated cardiomyopathy (DCM) patients and 60 for age- and gender-matched healthy ...
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ژورنال
عنوان ژورنال: JACC: Heart Failure
سال: 2017
ISSN: 2213-1779
DOI: 10.1016/j.jchf.2017.01.005