An intercoronary connection serving as a safety valve for the left ventricle

Area of Science:

• Cardiology
• Interventional Cardiology

Background:

• Intercoronary connections are rare findings during coronary angiography.
• They can function as a collateral circulation pathway, potentially preserving myocardial function in cases of coronary artery occlusion.

Observation:

• A 60-year-old woman presented with stable angina and hyperlipidemia.
• Coronary angiography revealed a total occlusion of the proximal left anterior descending (LAD) artery and severe circumflex artery stenosis.
• A large intercoronary connection was identified between the right coronary artery (RCA) and the distal LAD, providing retrograde flow (TIMI III) to the LAD.

Findings:

• The identified intercoronary connection served as a significant collateral pathway, supplying the occluded LAD.
• Due to the adequate retrograde flow through this connection, surgical revascularization of the LAD was deemed unnecessary.
• The patient successfully underwent percutaneous coronary intervention with bare metal stent implantation in the circumflex artery.

Implications:

• This case highlights the crucial role of collateral circulation in mitigating ischemic events.
• Recognizing and assessing intercoronary connections can alter revascularization strategies, potentially avoiding invasive procedures.
• Intercoronary connections may represent a valuable 'safety valve' in compromised coronary circulation, influencing clinical decision-making.