3. Echocardiographic evaluation of mitral regurgitation (MR)
using comprehensive multi-parameter method
The evaluation of MR was based on the diagnostic criteria for heart
valve disease published by American College of Cardiology (AHA) in
2017[6] and the Chinese expert consensus on
echocardiographic evaluation of interventional treatment of
MR[7]. Within 24 hours before CPVA, MR was
evaluated during sinus rhythm and under stable clinical conditions
(blood pressure control, optimal medical treatment).The vena contracta
width (VCW, cm) on the parasternal long-axis plane under ZOOM mode was
used as the main evaluation index of the degree of MR, the effective
regurgitant orififice area (EROA) and the regurgitant volume
(RVol)measured by PISA method was used as the second reference index,
(1)VCW<3 mm means mild MR; (2)VCW≥3,<7mm means moderate
MR;(3)VCW>7 mm imeans severe MR(Table 1). All patients
received echocardiography within 3 months after the operation.