PURPOSE : The purpose was consideration the measurement of pulmonary regurgitant flowvelocity by continuous-wave Doppler echocardiography.
MATERIAL AND METHOD : The study population consisted of 51 patients that underwent the cardiac catheteri2ation within 10 days after the Doppler examination. In these patients, for 13 patients of right-sided pressure determination, we did linear regression analysis to differ. ence between pulmonary artery diastolic pressure and right ventricular end-diastolic pressure in the catheterization (PADP-RVEDP) versus the pulmonary artery-to-right ventricular pressure gradient at end-diastolic by continuous-wave Doppler echocardiography that were cornptrted in means of the simplified Bernoulli equation (4V2) from the pulmonary regurgitant flow velocity (PR-PG), and compared. For 46 patients of left-sided pressure determination, we did linear regression analysis to left ventricular end-diastolic pressure in the catheterization (LVEDP) versus PR-PG. Moreover, we were classified angina pectoris (group AP), acute myocardial infarction (group AMI). congestive heart failure (group CHF) in 51 patients. and we considered for significant difference at PR-PG of the groups.
RESULT : PADP-RVEDP versus PR-PG had the correlation (y=0.96x+2.2, r=0.88, p<O.0001). LVEDPversus PR-PG had the correlation (y=0.73x-7.0, r=0.83, p<0.0001; x=1.37y+9.6). For difference of PR-PG at the each team, group AP were 3.4±1.0mmHg, group AMI were 6.4±2.5mmHg. and group CHF were 15.1±4.3mmHg, there were significant difference at al: groups.
CONCLUSION : The pulmonary artery-to-right ventricular pressure gradient at end-diastolic was able to get noninvasively by continuous-wave Doppler echocardiography, because PADPRVEDP and PR-PG approximated to each other. It seemed that adding lOmmHg to PR-PG were valid at estimation of LVEDP. Normal PR-PG were understood 5mmllg or less, and CHF were high PR-PG. It was useful for diagnosis of CHF that pulmonary regurgitant flow velocity was measured by continuous-wave Doppler echocardiography.