Myocardial perfusion assessed by contrast echocardiography correlates with angiographic perfusion parameters in patients with a first acute myocardial infarction successfully treated with angioplasty

BACKGROUND: Angiographic flow in an epicardial artery does not define perfusion at the microvascular level. AIM: To compare myocardial contrast echocardiography (MCE) with angiographic methods of assessing microvascular reperfusion in patients with acute myocardial infarction (AMI). METHODS: One hundred consecutive patients with a first ST segment elevation myocardial infarction and single-vessel disease were successfully treated with primary percutaneous Coronary intervention. Regional contrast score index (RCSI), corrected Thrombolysis In Myocardial Infarction TIMI) frame Count (cTFC), TMI myocardial perfusion grade (TMPG) and myocardial blush grade were evaluated. RESULTS: Among 717 asynergic segments on MCE, 168 revealed a lack of perfusion. TMG and cTFC correlated significantly with RCSI (P=0.03 and P=0.027, respectively). Myocardial blush grade did not correlate with RCSI (P=0.067). Patients with anterior AMI had significantly more segments with a perfusion defect on MCE than patients with inferior AM (P=0.0001). CONCLUSIONS: MCE results correlate with angiographic methods of perfusion assessment Such as TMPG and cTFC. Anterior AMI is associated with a greater extent of perfusion defect. MCE results correlate also with recovery of systolic left ventricular function and clinical outcome at six month follow-up.