Intercoronary communication: a rare coronary anomaly.
Seenu Prasanth Adimoulame1, Anand Palakshachar2, Rangaraj Ramalingam2
1All India Institute of Medical Sciences, Nagpur, India. seenuprasanth.a@gmail.com.
Summary
Intercoronary communication (ICC) is a rare coronary artery anomaly. Recognizing ICC and differentiating it from collaterals is crucial for accurate diagnosis and management of coronary artery disease.
Area of Science:
- Cardiology
- Vascular Biology
- Medical Imaging
Background:
- Intercoronary communication (ICC), also known as coronary arcade or cascade, is an exceptionally rare coronary artery anomaly with an incidence of 0.002%.
- This anomaly's clinical significance necessitates careful recognition and understanding.
Purpose of the Study:
- To report a case of intercoronary communication.
- To highlight the importance of differentiating ICC from coronary collaterals.
Main Methods:
- A case of a 56-year-old female presenting with acute chest pain and ST-segment depression was investigated.
- Coronary angiography revealed significant stenosis in the obtuse marginal artery and an abnormal channel consistent with ICC between the right posterolateral branch and distal left circumflex artery.
- CT-coronary angiography confirmed the ICC diagnosis.
Main Results:
- The patient was diagnosed with non-ST-elevation myocardial infarction and treated with a drug-eluting stent for the obtuse marginal artery stenosis.
- The intercoronary communication was identified but not actively intervened upon.
- The patient remained asymptomatic during a year of follow-up.
Conclusions:
- Intercoronary communications (ICCs) are distinct from coronary collaterals, characterized by single, straight channels with well-defined muscular layers, often without obstructive disease.
- Coronary collaterals are typically multiple, tortuous, <1mm in diameter, and develop secondary to obstructive coronary artery disease.
- Accurate differentiation is vital for diagnosis, as ICCs can aid myocardial perfusion or potentially cause coronary steal.
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