Original article: cardiovascular
Secundum ASD closure using a right lateral minithoracotomy: Five-Year experience in 122 patients

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Abstract

Background

Surgical closure of secundum atrial septal defect (ASD) is a standard procedure associated with very low mortality and morbidity. We evaluated outcomes in the era of catheter-based interventional closure and minimally invasive techniques.

Methods

From May 1996, February 2002, 177 patients with a body weight of more than 30 kg underwent surgical ASD closure. A right lateral minithoracotomy (LMT) was used in 122 patients and a conventional approach, in 55. Diagnoses included secundum ASD in 106 patients in the LMT group and 40 in the conventional group, sinus venosus ASD in 13 patients in each group, and status post interventional closure in 3 and 2 patients, respectively. Mean age was 37 ± 17 years in the LMT group and 43 ± 20 years, in the conventional group and mean body weight was 66 ± 17 kg and 70 ± 16 kg, respectively. In the LMT group, femoral cannulation was performed for cardiopulmonary bypass.

Results

Direct ASD closure was carried out in 67.2% of patients in the LMT group and 58.2% of those in the conventional group. The remaining patients had pericardial patch closure. There was one death: A patient in the conventional group who required explantation of an Amplatzer device because of infection died postoperatively. Average stay in the intensive care unit was 1.2 ± 0.5 days. Two patients required reoperation for residual ASD after direct closure; 1 sustained a temporary neurological deficit that resolved completely. On postoperative echocardiography, a minimal residual shunt was seen in only 3 patients. All patients were in good clinical condition with improved functional status at discharge from the hospital.

Conclusions

Secundum ASD closure by LMT has become as standard and safe an operation as the conventional technique and achieves good perioperative results and satisfactory long-term outcomes. Thus LMT is an attractive option for patients who are not suitable for closure using catheter-based devices.

Section snippets

Patient population

All patients with a body weight of more than 30 kg undergoing operation between May 1996 and February 2002 were prospectively evaluated. Indications for secundum ASD closure were based on standard criteria: the presence of clinical signs such as dyspnea, recurrent respiratory tract infections, arrhythmias, or both, and a major shunt on the atrial level leading to a pulmonary to systemic flow ratio greater than 1.5:1 [6].

A total of 177 patients were evaluated, 122 of whom underwent a right LMT

Intraoperative results

All operations were performed without incident. No conversions from the LMT to the conventional technique were required. Total duration of the operation was 126 ± 47 minutes in the LMT group and 117 ± 42 minutes in the conventional group (p = NS), and cardiopulmonary bypass averaged 67 ± 32 minutes versus 50 ± 29 minutes, respectively (p < 0.01). Closure of the defect was carried out using aortic cross-clamping in 35.2% of the LMT group versus 87.3% of the conventional group (p < 0.05) or

Comment

Beginning in the 1950s, surgical closure of an ASD was performed using either a lateral thoracotomy or a conventional median sternotomy. Since the 1990s, interventional approaches for simple pathological conditions and minimally invasive surgical techniques have been increasingly applied. The aim of this study was to evaluate current outcome with the LMT approach and to compare it with results using the conventional approach. Our experience with a right LMT indicate that surgical ASD closure

References (11)

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