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Is surgical ligation of an accessory left superior vena cava always safe?
A J Muster1, Z J Naheed, C L Backer
1Division of Cardiology, Box 21, The Children's Memorial Hospital, 2300 Children's Plaza, Chicago, IL 60614, USA.
Insights
Diagnosing left superior vena cava (LSVC) with coronary sinus atresia preoperatively is crucial. This avoids surgical complications and protects myocardial perfusion during cardiac procedures.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Patients undergoing bidirectional Glenn or Fontan procedures may have complex congenital heart anomalies.
- Left superior vena cava (LSVC) anomalies can impact surgical planning and outcomes.
- Coronary sinus atresia presents a unique challenge in cardiac surgery.
Observation:
- This report focuses on the specific scenario of LSVC as the sole drainage route for a blind coronary sinus.
- Angiographic and hemodynamic characteristics are key to identifying this association.
- Doppler ultrasonography revealing retrograde flow in LSVC is a significant diagnostic clue.
Findings:
- Preoperative diagnosis of LSVC with coronary sinus ostial atresia is essential.
- Failure to diagnose can lead to inadvertent surgical division or ligation of LSVC.
- This can result in coronary venous hypertension and adverse effects on myocardial perfusion.
Implications:
- Accurate preoperative diagnosis prevents surgical complications and protects heart function.
- Improved understanding of LSVC and coronary sinus anomalies aids surgical strategy.
- Early detection ensures better patient outcomes in complex congenital heart surgeries.
Abstract:
In patients considered for bidirectional Glenn or Fontan procedures, the association of left superior vena cava (LSVC) with ostial atresia of the coronary sinus should be diagnosed preoperatively in order to avoid surgical division or ligation of the LSVC and the negative effect of resulting coronary venous hypertension on myocardial perfusion. This report discusses the angiographic and hemodynamic features of LSVC when it is the only drainage route from a blind coronary sinus. A retrograde flow in the LSVC seen by Doppler ultrasonography should raise the suspicion of this diagnosis.