Differences in mitral annulus remodelling in acute anterior ST elevation and acute inferior ST elevation myocardial infarction

Introduction. Myocardial infarction is known to account for left ventricular remodelling and mitral annular distortion. The aim of the study was to assess and compare morphometric changes of mitral annulus in patients presenting with acute anterior or inferior myocardial infarction. The objectives of our study were as follows: assessment of anteroposterior and septolateral annular dimensions of mitral annulus in patients with acute myocardial infarction; assessment of mitral annular area and annular contraction in patients with acute myocardial infarction; evaluation of parameters reflecting mitral apparatus (chordal length, chordal papillary muscle distance, etc.); and comparison of mitral annular geometry between patients with anterior and inferior myocardial infarction. Materials and methods. Echocardiographic data of 30 patients with an anterior ST elevation myocardial infarction and data of 30 patients with an inferior ST elevation myocardial infarction on an acute stage was collected, evaluated, and compared. Results and conclusions. The mitral annulus shows some significant changes in both post inferior myocardial infarction and post anterior myocardial infarction patients. The magnitude of movements of a post inferior myocardial infarction mitral annulus is greatly reduced when compared to mitral annulus in patients with anterior myocardial infarction. While echocardiographically measuring post-myocardial infarction mitral annulus, we decided that inferior myocardial infarction accounts for earlier mitral annular dilatation compared to patients with anterior myocardial infarction.