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Anatomy of coronary arteries in univentricular hearts and its surgical implications
Insights
Understanding coronary arterial anatomy in univentricular hearts is crucial for surgical success. Identifying outlet chambers and rudimentary pouches via coronary anatomy can prevent surgical injury to major coronary branches.
Area of Science:
- Cardiovascular Anatomy
- Pediatric Cardiology
- Congenital Heart Disease Surgery
Background:
- Univentricular hearts present complex anatomical challenges.
- Surgical outcomes in these cases are heavily influenced by detailed anatomical understanding.
Purpose of the Study:
- To analyze coronary arterial anatomy in univentricular hearts.
- To correlate coronary anatomy with ventricular morphology and rudimentary chambers.
- To assess surgical implications and risks associated with coronary artery variations.
Main Methods:
- Retrospective analysis of 26 univentricular hearts.
- Evaluation of coronary arterial anatomy in relation to ventricular morphology.
- Review of surgical histories, including septation and palliative procedures.
Main Results:
- In 21 hearts with a left ventricular type main chamber, outlet chambers were identified, often delineated by right and left delimiting arteries.
- Major right coronary artery branches coursed over the anterior wall in 20 hearts, with 13 experiencing surgical injury leading to myocardial necrosis.
- In hearts without an outlet chamber, rudimentary pouches were present, and two also had injured coronary arteries.
Conclusions:
- Coronary anatomy is key to identifying outlet chambers and rudimentary pouches in univentricular hearts.
- Vulnerable coronary branches overlying common surgical sites pose a significant risk of injury.
- Accurate pre-operative assessment of coronary anatomy is vital to minimize iatrogenic complications during corrective or palliative surgeries.
Abstract:
The coronary arterial anatomy in 26 univentricular hearts, its relation to the morphologic characteristics of the ventricles and rudimentary chambers, and its surgical implications were analyzed. All of the hearts except two had been operated on; 18 had septation with or without an extracardiac conduit and 6 had had palliative procedures. Twenty-one univentricular hearts with a left ventricular type main chamber had an anterior outlet chamber (17 left-sided subaortic, 3 right-sided subaortic and 1 right-sided subpulmonary). Right and left delimiting arteries outlined the outlet chamber in 16 hearts (76 percent). In 20 of the 21 hearts, large delimiting parallel branches of the right coronary artery course over the anterior wall of the heart; 13 of these vessels had been injured surgically with resultant ischemic myocardial necrosis. Five univentricular hearts did not have an outlet chamber; two had a left ventricular type main chamber and three had a morphologically right ventricular main chamber. Three of the five hearts had rudimentary pouches, located anteriorly in one and posteriorly in two. The two rudimentary pouches lying posteriorly were not outlined by delimiting arteries. Two of the five univentricular hearts without an outlet chamber also had injured coronary arteries. Thus, the identification of outlet chambers and rudimentary pouches in univentricular hearts is facilitated by the determination of coronary anatomy. The presence of major delimiting parallel branches over the usually favored ventriculotomy sites renders them vulnerable to surgical injury; such mishaps occurred in 15 of the 24 hearts that had either corrective or palliative operations.