Study on right ventricular function in patients with acute inferior wall myocardial infarction / 中华老年医学杂志

ABSTRACT

Objective To evaluate the right ventricular (RV) function in patients with acute inferior wall myocardial infarction ( AIMI ) with tissue Doppler imaging and M-mode echocardiography. Methods There were 50 cases of AIMI, 34 males and 16 females. And 50 healthy persons were as control group, 30 males and 20 males. From the echocardiographic apical 4- chamber views, the systolic, early and late diastolic motion (SD, DED, DAD) of the tricuspid annulus were recorded at the RV free wall with the use of two-dimentional guided M-mode recordings. Peak systolic, early and late diastolic velocities (Sm, Em, Am) of the tricuspid annulus were also recorded at the same site by tissue Doppler imaging. The ratios of DAD/DAD and Em/Am were calculated. Results SD, DED, Sm and Em of the tricuspid annulus at the RV free wall, as well as the ratios of DED/DAD and Em/Am, were reduced significantly in patients with AIMI as compared with health control [SD (18.7±5.5) mmvs. (24.9±2.8) mm; DED (10.9±3.4) mmvs. (16.6±3.4) mm;Sm (12.9±2.8) cm/s vs. (15.9±2.7) cm/s; Em (12.3±3.4) cm/s vs. (16.7±4.7) cm/s;DED/DAD (1.5±0.6) vs. (2.3±0.9); Em/Am (0.9±0.4) vs. (1.1±0.3); t=18.711,19. 055, 11. 851, 14. 781, 6.068, 2. 127; P＜0. 01 or 0. 05, respectively]. There were no statistically significant differences in DAD and Am between two groups [DAD (8. 8±1.9) mm vs. (7.7±2.1)mm; Am (17.5±4.8) cm/s vs. (16.6±5.2) cm/s; t=0.414, 0.649; both P＞0.05].Conclusions The systolic and diastolic functions of RV are impaired in patients with AIMI.