two-dimensional echocardiography during agitated saline contrast injections into the left ventricle was applied in eight closed chest dogs to examine the degree of mitral valve regurgitation encountered with pacing from two sites : 1 ) at the right ventricular apex and 2 ) within the coronary sinus at the base of the left ventricle .
C0817096
chest
C0026266
mitral valve regurgitation