Relationship of Myocardial Performance Index During Low Dose Dobutamine with the Myocardial Improvement After Revascularization and Its Value in Prediction of Myocardial Viability in Patients with Acute Myocardial Infarction

AIM
This study was planned to evaluate the relationsh ip of th e change in the myocardial performance index (MPI) obtained by low dose dobutamine stress echocardiography (DSE) with the myocardial improveınent after revascularization and its value in ident ify ing the significant viable myocardial tissue in patients with acute myocardial infaretion (AMI).
METHODS
Forty patients (mean age 57±9 years, 6 female) with Q-AMI, who had no prior myocardial infarction, were enrolled. The wall motion score index (WMSI) and MPI we re obtained echocardiographically in basal and low dose DSE in all patients and in the second month after revascularization in 24 revascularized patients. The WMSI was assessed qualitatively by seering normal to dyskinesia (1-4 points) according to 16- segınents model.
RESULTS
The MPI and WMSI obtained by low dose DSE were similar to those after revascularization (0.5±0.14 and 1.24±0.24 vs. 0.52±0. 15 and 1.28±0.22, pCONCLUSIONS
The change rate in MPI with low dose DSE correlates with myocardial healing after revascularization. This rate has a high negative predictive value in prediction of the significant viable myocardial tissue, but its positive predictive value is low. Thus, MPI can be usedas an altemative method of WMSI in soıne cases in when specificity decreases.