Right Ventricular Myocardial Infarction-A Tale of Two Ventricles: JACC Focus Seminar 1/5

Area of Science:

• Cardiology
• Cardiovascular Medicine
• Myocardial Infarction Research

Background:

• Right ventricular infarction (RVI) complicates approximately 50% of acute inferior ST-elevation myocardial infarctions.
• RVI is linked to increased in-hospital morbidity and mortality.
• Ischemic right ventricular (RV) systolic dysfunction leads to hypotension and right heart failure.

Purpose of the Study:

• To summarize the pathophysiology, clinical presentation, and management of right ventricular infarction.
• To highlight the RV's resistance to infarction and recovery potential.
• To discuss the role of circulatory support in persistent hemodynamic compromise.

Main Methods:

• Review of existing literature on right ventricular infarction.
• Analysis of hemodynamic consequences of RV dysfunction.
• Discussion of arrhythmogenic potential and recovery mechanisms.

Main Results:

• RV systolic dysfunction impairs left ventricular preload, causing hypotension.
• Proximal occlusions can lead to right atrial ischemia and hemodynamic compromise.
• RVI is associated with bradyarrhythmias and potentially malignant ventricular arrhythmias.
• The RV demonstrates remarkable resistance to infarction and significant recovery potential post-reperfusion.

Conclusions:

• Despite high morbidity, RV recovery is facilitated by reperfusion, even after prolonged occlusion.
• Persistent hemodynamic compromise may necessitate mechanical circulatory support as a bridge to recovery.
• Understanding RV's unique response to ischemia is crucial for effective patient management.