Myocardial bridging of the left anterior descending coronary artery in acute inferior wall myocardial infarction

Abstract

SummaryBackground: We observed marked myocardial bridging of the left anterior descending coronary artery (LAD) in the acute stages of inferior wall myocardial infarction (MI) in a group of patients who developed shock despite successful reperfusion of the infarct-related lesion (IRL).Hypothesis: The purpose of this study was to elucidate the clinical significance of myocardial bridging in patients with inferior wall MI and shock.Merhods: The study group consisted of 53 patients with single-vessel disease of the right coronary artery, who underwent coronary angiography for acute inferior wall MI. Clinical characteristics, coronary angiographic findings, and left ventricular function during the chronic phase were compared between the patients who developed shock (the shock group) and those who did not (the non-shock group). In addition, a multiple logistic analysis was performed to identify independent predictors of shock in patients with acute inferior wall MI.Results: Reperfusion of the IRL was obtained in all 53 pa-

The role of myocardial perfusion imaging in evaluating patients with myocardial bridging

“…The prevalence of MB ranges from 15% to 85% in autopsy studies when compared to only 0.5-2.5% in conventional angiographic studies. 3,4 Although MB was generally thought to be a benign variation, however, cumulative evidence now suggests that it may be associated with myocardial ischemia, 5 myocardial infarction 6,7 arrhythmias, and sudden death, 8 Therefore, it has become important for clinical doctors to evaluate the hemodynamics of MB. Several methods, such as intravascular ultrasound (IVUS), intracoronary Doppler, and intracoronary pressure, have been utilized to measure both anatomical and physiological parameters of coronary vessels.…”

Transient myocardial bridging of the left anterior descending coronary artery in acute inferior myocardial infarction

“…Echocardiography conducted in the chronic stage showed improvement in the motion of the infarct related walls and resolution of compensatory hypercontraction of the anterior wall. First Yano et al [18] describe this situation. They found marked myocardial bridging of the LAD in the acute stages of inferior MI in a group of patients who developed shock despite successful reperfusion of the IRL.…”

Myocardial Bridging in Absence of Coronary Artery Disease: Proposal of a New Classification Based on Clinical-Angiographic Data and Long-Term Follow-Up

“…2a, b) [1, 2]. MB has been associated with myocardial infarction (MI), sudden cardiac death, supraventricular and ventricular arrhythmias, QT interval changes, transient left ventricular dysfunction and coronary artery spasm [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. …”