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1 From the Pulmonary Section, Department of Medicine and the Department of Surgery, Boston Veterans Affairs Medical Center, and the Pulmonary Center, Boston University and Tufts University Schools of Medicine, Boston
The ability to successfully exercise has been used to assess the cardiopulmonary risk of thoracotomy for lung cancer. Because of musculoskeletal, neurologic, peripheral vascular, or behavioral problems, not all patients presenting for pulmonary resection are capable of exercising. Using a multifactorial cardiopulmonary risk index (CPRI) consisting of a cardiac risk index (CRI) and a pulmonary risk index, we studied 74 patients (60 capable of exercising and 14 incapable of exercising) who underwent thoracotomy for lung cancer resection. The groups were similar in reference to history of pulmonary disease, preoperative pulmonary function, and pulmonary risk index score. The no-exercise patients were more likely to have a history of cardiac disease (64 vs 28%; p <0.01) and had a higher CRI score (2.0 ± 0.2 vs 1.4 ± 0.1; p <0.05). Cardiopulmonary postoperative complications (POCs) and mortality were more likely among those in the no-exercise group vs those in the exercise group (POCs, 79 vs 35%, p <0.01; mortality, 21 vs 2%, p <0.05). Among the eight no-exercise patients with a CPRI of 4 or more, all eight suffered a POC (100%) and three died (38%). Using multiple logistic regression analysis, both the CPRI score and the inability to exercise were independently associated with increased risk for POCs. We conclude that patients unable to perform even minimal preoperative exercise are at substantially increased risk for morbidity and mortality after lung resection. This results both from greater identifiable preoperative cardiopulmonary risk factors (as assessed by the CPRI) and from an independent effect related to the inability to exercise.
Key Words: exercise testing lung cancer postoperative complications preoperative assessment thoracotomy
Submitted on December 20, 1993
Accepted on June 23, 1994
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