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Eur J Cardiothorac Surg 2001;19:417-423
© 2001 Elsevier Science NL

Is aortic surgery using hypothermic circulatory arrest in octogenarians justifiable?

^a Department of Cardiothoracic Surgery, Mount Sinai School of Medicine, New York, NY 10029, USA
^b Department of Biomathematics, Mount Sinai School of Medicine, New York, NY, USA

Received 18 October 2000; received in revised form 13 January 2001; accepted 22 January 2001.

Corresponding author. Tel.: +1-212-241-8181; fax: +1-212-534-3357
e-mail: chagl{at}hotmail.com

Objective: This study was undertaken to analyze the risk of mortality and neurological complications after aortic surgery requiring hypothermic circulatory arrest (HCA) in octogenarians. Methods: All patients of >80 years at the time of aortic surgery requiring HCA since 1988 were examined. Of 51 patients, 23 were male; the median age was 83. Twenty-six (51%) had proximal repair; the arch was replaced in eight (16%), and 17 (33%) had descending aorta repair. Eleven (22%) were emergencies. Multivariate analysis was carried out to determine the risk factors for in-hospital mortality and/or stroke (adverse outcome) using variables with P<0.1 after univariate analysis. Results: The hospital mortality was 16%. Five patients suffered strokes (9.8%): only one survived >6 months, and three died before discharge. The overall adverse outcome was 22%, but elective operation was associated with much better results, with an adverse outcome of only 3.6% after operations via a median sternotomy. Adverse outcome was strikingly higher with more distal resections via a left thoracotomy: 47 vs. 8.8% for ascending aorta/arch resections (P=0.003). Emergency operation via a lateral thoracotomy was associated with a prohibitively high adverse outcome. Twenty-nine patients (73%) had temporary neurological dysfunction (TND). Multivariate analysis revealed emergency operation (P=0.01; odds ratio (OR), 10.6) and operations via a lateral thoracotomy (P=0.008; OR, 11) as independent preoperative predictors of adverse outcome. The overall survival was 66% at 2 years and 39% at 5 years, compared with 85 and 52% among age- and sex-matched controls. Conclusions: Aortic surgery utilizing HCA in octogenarians can be performed with an acceptable risk of mortality and stroke. From the evidence in this study, it seems that elective aneurysm repair via a median sternotomy can be undertaken for the usual indications, even in octogenarians. However, the enhanced vulnerability of the brain in the elderly is reflected by a high early mortality following stroke, and a high incidence of TND. Emergency operations increase the possibility of adverse outcome dramatically, and patients who require a lateral thoracotomy are at significantly higher risk than those operated via a median sternotomy.

Key Words: Aortic surgery • Hypothermic circulatory arrest • Adverse outcome • Octogenarians • Neurological complications

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