Patient characteristics and measurements. NHYA is the New York Heart Association functional classification; QRSd is the QRS complex duration; CO, cardiac output; EF, ejection fraction; HR, heart rate; SV, stroke volume; MRV is the mitral valve regurgitation volume; MV E/A, mitral valve E/A wave ratio; RVEDP, end-diastolic right ventricular pressure; RVESP, end-systolic right ventricular pressure; LVEDP, end-diastolic left ventricular pressure; LVESP, end-systolic left ventricular pressure; LVEDV, end-diastolic left ventricular volume; LVESV, end-systolic