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Hemodynamic and angiographic changes after Mustard operation for transposition of the great arteries
Insights
The Mustard operation effectively treats transposition of the great arteries but can lead to venous obstruction and heart function issues. Postoperative monitoring is crucial for identifying complications after this surgery.
Area of Science:
- Cardiology
- Pediatric Cardiac Surgery
- Cardiovascular Physiology
Background:
- The Mustard operation is a palliative surgical procedure for transposition of the great arteries (TGA).
- Postoperative assessment is vital to understand the long-term hemodynamic and functional consequences of the Mustard operation.
Purpose of the Study:
- To evaluate the hemodynamic and angiocardiographic changes following the Mustard operation in patients with TGA.
- To identify potential complications and long-term effects of the surgery.
Main Methods:
- Hemodynamic and angiocardiographic studies were performed on 25 patients post-Mustard operation.
- Cardiac catheterization and right ventricular angiography were utilized to assess cardiac function and identify complications.
Main Results:
- Systemic oxygen saturation and blood pressure improved, with polycythemia resolving in all patients.
- Complications included patch detachment (5 patients), superior vena caval obstruction (10 patients), inferior vena caval obstruction (1 patient), and pulmonary venous obstruction (2 patients).
- Right ventricular angiograms showed increased trabeculations, poorer contractility (12 patients), and tricuspid insufficiency (9 patients).
Conclusions:
- While effective for cyanosis relief in TGA, the Mustard operation carries risks of venous obstruction, baffle complications, and impaired right ventricular function.
- Pulmonary or systemic venous obstruction was more frequent in patients with Dacron intraatrial baffles.
- Long-term cardiac catheterization and angiocardiographic monitoring are recommended to detect potential complications after the Mustard operation.
Abstract:
After Mustard operation for transposition of the great arteries, hemodynamic and angiocardiographic changes were evaluated in 25 patients. In 19 patients, postoperative studies were done electively and, in 6 patients, they were required to investigate symptoms of heart failure, these symptoms were temporary in 4 patients and progressive in 2. Both of the latter had pulmonary venous obstruction which was later relieved successfully by reoperation. After operation, systemic arterial oxygen saturation and blood pressure increased and polycythemia disappeared in every patient. However, several complications-some of them unsuspected clinically-were identified by cardiac catheterization: (a) patch detachment in 5 patients; (b) obstruction of superior vena caval return in 10 patients; (c) obstruction of inferior vena return in 1 patient; and (d) pulmonary venous obstruction in 2 patients. The incidence of pulmonary or systemic venous obstruction was higher in patients who had a Dacron intraatrial baffle (8 of 19 patients). Comparison of 21 sets of preoperative and postoperative right ventricular angiograms demonstrated an increase in right ventricular trabeculations in each patient, poorer right ventricular contractility in 12 patients, and development of tricuspid insufficiency in nine patients. None of the patients with poor right ventricular contractility had had surgical ventriculotomy. Although Mustard operation for transposition of the great arteries is effective in relieving cyanosis, it may be followed by obstruction to systemic or pulmonary venous return, intraatrial patch detachment, tricuspid insufficiency and angiocardiographic evidences of poor right ventricular contractility.