Acute Change in Left Ventricle End-diastolic Pressure after Primary Percutaneous Coronary Intervention in Patients with ST Segment Elevation Myocardial Infarction

UNLABELLED: ST segment elevation myocardial infarction (STEMI) causes decreasing left ventricle compliance, increasing left ventricle end-diastolic pressure (LVEDP), and diastolic dysfunctioning. It is known that primary percutaneous coronary intervention (PCI) has an acute effect on left ventricle compliance. AIMS: This study aims to determine whether left ventricle diastolic function improves and LVEDP decreases post-PCI in patients with STEMI. METHODS: Twenty-nine patients (21 male, mean age 62 ± 12) diagnosed with a first anterior or inferior STEMI and hospitalized in the first six hours were enrolled. Coronary angiography (CAG) showed occlusion of the right coronary artery (RCA), circumflex (Cx), or left anterior descending (LAD) coronary artery. Aortic pressure and LVEDP were measured and compared before and after PCI. RESULTS: After successful reperfusion, left ventricle diastolic function improved and LVEDP decreased significantly. Decrease in mean LVEDP was 5.7 ± 2.9 mmHg (p=0.0005) and 4.9 ± 6.5 mmHg (p=0.026) in inferior and anterior MI, respectively. Clinical and electrocardiographic (ECG) findings improved quickly. CONCLUSION: Primary PCA provides rapid improvement of LVEDP and diastolic functions in both anterior and inferior MI. Left ventricular pressure (before and after PCI) can be measured during the procedure without any complication, so it can be used for quick evaluation of left ventricular diastolic function improvement.