Boundary Detection of Echocardiographic Images During Mitral Regurgitation (original) (raw)

2019

Abstract

In case of significant Mitral Regurgitation (MR), left ventricle has to accommodate both the stroke volume and the regurgitant volume with each heart beat so it leads to volume overload of the left ventricle. The left ventricle dilates and becomes hyper-dynamic for compensation. The left atrial and pulmonary venous pressures increase sharply in case of acute severe MR, leading to pulmonary congestion and pulmonary edema. A gradual increase in left atrial size, by way of compliance, compensates in chronic MR, so that left atrial and pulmonary venous pressures do not increase until late in the course of the disease. An increase in after load, contractile dysfunction, and heart failure occur in case of progressive left ventricular dilation. This entails the detection of boundaries of heart’s chambers, for which two new models, viz. the Fast Region Active Contour Model (FRACM) and the Novel Selective Binary and Gaussian Filtering Regularized Level Set (NSBGFRLS) have been developed and ...

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