[Ramus limbi dextri or "moderator band" artery]

Area of Science:

• Cardiology
• Pathology
• Anatomy

Background:

• Acute left ventricular failure can be a fatal complication of myocardial infarction.
• Assessing coronary artery anatomy and collateral circulation is crucial for understanding myocardial infarction outcomes.

Observation:

• A case study of a patient who died from acute left ventricular failure following myocardial infarction.
• Autopsy confirmed an anterior myocardial infarct.
• Postmortem coronarography demonstrated near-complete occlusion of the left main coronary artery.

Findings:

• A well-developed collateral circulation was identified as a compensatory mechanism.
• The moderator band artery was visualized and identified as part of this collateral network.
• This highlights the potential role of unusual collateral pathways in myocardial infarction.

Implications:

• Understanding extensive collateral circulation, including the moderator band artery, is important for managing myocardial infarction.
• This case emphasizes the complex interplay between coronary artery occlusion, collateralization, and heart failure.
• Further research into the functional significance of such collateral pathways may offer new therapeutic targets.