Left ventricle diastolic function in the patients after coronary arteries bypass graft combined with left ventricle aneurismectomy according to tissue doppler imaging: one year follow-up

Aim: To evaluate left ventricle (LV) diastolic function dynamics in patients after acute myocardial infarction ( AMI) after combined operation of coronary artery bypass graft with LV aneurismectomy (CABG + AE) according to the results of tissue Doppler imaging (TDI). Methods: Forty patients after AMI underwent Doppler echocardiography (EchoCG) with TDI and M-mode colour-flow imaging before and in 3 and 12 months after CABG + AE. Mitral annulus ( MA) TDI with velocity indices was performed in 4 segments of LV. Results: Conventional transmitral diastolic Doppler indices before and after CABG + AE remained unchanged. TDI showed significant improvement of LV systolic ( systolic movement velocity S: 6.1 +/- 0.8, 7.4 +/- 1.2 and 6.9 +/- 1.3 cm/sec. before and in 3 and 12 months after the operation, respectively, p < 0.01) and diastolic function after the operation ( MA early diastolic movement velocity (e'): 7.3 +/- 2.1, 8.4 +/- 1.5 and 8.9 +/- 1.8 cm/s.; ratio of transmitral early-flow velocity ( E) to MA early-diastolic movement velocity (E/ e'): 18.4 +/- 2.2, 12.3 +/- 1.8 and 11.5 +/- 2.3; ratio of E diastolic flow propagation velocity (Vp) 3.1 +/- 0.45, 2.2 +/- 0.38 and 1.8 +/- 0.16 before and in 3 and 12 months after the operation, respectively, p < 0.01). Conclusions: Results of the study demonstrate significant improvement of LV diastolic function in the patient after CABG + AE according to TDI, regardless of transmitral flow pattern. TDI is more sensitive and preload independent method of LV myocardial function evaluation.