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Updated: Aug 16, 2026

Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
Published on: March 27, 2018
[A surgical case of coronary sinus ASD]
H Shimura1, S Uemura, Y Harada
1Department of Cardiovascular Surgery, Chiba Kaihin Municipal Hospital.
Insights
A rare case of coronary sinus atrial septal defect (ASD) was found in a 56-year-old woman during surgery. This defect, associated with a missing left superior vena cava (LSVC), was successfully repaired using a pericardial patch.
Area of Science:
- Cardiology
- Cardiac Surgery
- Congenital Heart Disease
Background:
- Atrial septal defects (ASDs) are common congenital heart anomalies.
- Coronary sinus type ASDs are a rare subtype, often associated with other cardiac anomalies.
- Diagnosis can be challenging, especially when presenting incidentally in adulthood.
Observation:
- A 56-year-old woman presented for an operation where a coronary sinus ASD was incidentally discovered.
- A persistent left superior vena cava (LSVC) was absent.
- The coronary sinus anomalously drained directly into the left atrium.
Findings:
- The coronary sinus ASD was confirmed intraoperatively.
- The absence of LSVC and anomalous drainage of the coronary sinus into the left atrium were key anatomical findings.
- The defect was surgically closed using a pericardial patch.
Implications:
- This case highlights the importance of recognizing rare coronary sinus ASD variants.
- Surgical repair is feasible and effective for such anomalies.
- Understanding these variations is crucial for accurate diagnosis and successful surgical management in adult congenital heart disease.
Abstract:
A case of coronary sinus ASD in a 56-years-old woman is reported. This defect was detected during operation for the first time. In this case, a LSVC was absent and coronary sinus opened into the left atrium. The defect was closed using a pericardial patch.

