A very rare interarterial communication: total occlusion of right coronary artery with antegrade collateral supply from left circumflex artery through conus branch.

Purpose: The purpose of the present case report is to describe an extremely rare and unusual coronary interarterial communication.

Methods: A 65-year-old female patient admitted with acute coronary syndrome underwent a coronary angiography performed with Judkins technique to obtain standard angiographic views.

Results: We have demonstrated a very rare interarterial communication traversing an unusual retroaortic path between the body of left circumflex artery and the conus branch of the right coronary artery.

Conclusion: Coronary interarterial communications are rarely encountered; however, may fulfill important tasks in the coronary circulation. Therefore, invasive cardiologists and cardiovascular surgeons should be aware of their presence.