Anatomically positioned aorta ascending-descending bypass grafting via left posterolateral thoracotomy for reoperation of aortic coarctation.

OBJECTIVE

Operation for aortic recoarctation and/or residual hypoplastic arch represents a surgical challenge because of surrounding scar tissue in the coarctation area, hazard of spinal cord ischemia due to aortic cross-clamping, laceration of the recurrent nerve, and the choice of the best approach. We demonstrate the first results of an anatomically guided technique via the prior left thoracotomy approach without establishment of cardiopulmonary bypass.

METHODS

Since 1989, five patients underwent anatomically positioned ascending-descending bypass grafting for treatment of recoarctation. Indication was a non-dilatable hypoplastic aortic arch segment; in two cases an additional isthmic restenosis was present. Inclusion criteria for our technique was an aorta ascending diameter large enough to allow partial clamping. Primary repair of aortic coarctation was end-to-end anastomosis in four patients and patch angioplasty in one. Mean age at primary repair was 5.5 years and at reoperation 16.1 years. Systolic pressure gradients at rest ranged from 35 to 70 mmHg; upper extremity hypertension was present in all patients. Operative technique consisted of performing a dacron or PTFE aorta ascending-descending bypass graft parallel to the aortic arch, size 18 or 20 mm in diameter, via the prior left thoracotomy.

RESULTS

There were no intraoperative complications and all patients survived. Postoperative complications were left lung atelectasis with necessity of reintubation, pericardial effusion, and transient left diaphragm elevation, each in one patient. After 7-90 months all patients are free of symptoms, have normal blood pressure (with two patients being under anti-hypertensive medication), and have no echocardiographically measurable pressure gradients.

CONCLUSIONS

Anatomically positioned aorta ascending-descending bypass grafting via the prior left posterolateral thoracotomy without cardiopulmonary bypass is a safe and efficient method for operation of complex recoarctation in patients with an acceptable size of the aorta ascendens.