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Infundibular septum and coronary anatomy in Jatene operation
Insights
In patients undergoing the Jatene operation for transposition of the great arteries, infundibular septum displacement significantly influences coronary anatomy. This relationship is crucial for surgical planning and improving outcomes.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- Transposition of the great arteries (TGA) is a complex congenital heart defect.
- The Jatene operation (arterial switch procedure) is a common surgical repair for TGA.
- Understanding associated anatomical variations is critical for surgical success.
Purpose of the Study:
- To investigate the relationship between infundibular septum displacement and coronary artery anatomy in TGA patients.
- To evaluate how these factors influence surgical outcomes after the Jatene operation.
Main Methods:
- Retrospective analysis of 40 TGA patients who underwent the Jatene operation.
- Categorization of patients based on ventricular septum status and infundibular septum alignment.
- Detailed assessment of coronary artery patterns (Shaher classification) in relation to septal displacement.
Main Results:
- Shaher type 1 coronary anatomy (left coronary artery anterior to pulmonary artery) was prevalent in groups with specific infundibular septum configurations.
- A significant proportion of patients exhibited unusual coronary patterns (Shaher types 2, 3, 4, 7, 9).
- All patients had a coronary artery (left or circumflex) coursing posterior to the pulmonary artery.
Conclusions:
- Infundibular septum displacement is a key determinant of both defect type, hemodynamics, and coronary artery anatomy in TGA.
- Surgical techniques minimizing dissection, such as removing the entire sinus of Valsalva, are recommended for managing unusual coronary patterns.
Abstract:
Displacement of the infundibular septum and coronary anatomy was studied in 40 patients with variable transposition of the great arteries who underwent the Jatene operation between August, 1982, and May, The perioperative mortality was 12.5%. Fourteen of the 16 patients (87.5%) with intact ventricular septum (Group I), eight of the 12 patients (67%) with aligned infundibular septum and perimembranous trabecular defect (Group II-A), and four of the 12 patients (33%) with anteriorly displaced infundibular septum, malaligned defect, overriding of the pulmonary valve, and severe pulmonary hypertension (Group hypertension (Group II-B) has Shaher type 1 coronary anatomy. In this type of coronary anatomy, the left coronary artery courses in front of the pulmonary artery. However, two patients (12.5%) from Group I, four (33%) from Group II-A, and eight (67%) from Group II-B had various unusual coronary patterns, such as Shaher types 2,3,4,7, and 9. All patients had a left or circumflex coronary artery coursing behind the pulmonary artery. These data suggest that the displacement of the infundibular septum not only determines the type of the defect and hemodynamics, but also often relates to the coronary anatomy Removal of a whole, scallop-shaped sinus of Valsalva and minimal dissection of the coronary artery are preferable, particularly for translocation of such unusual coronary anatomy.