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1 From the Departments of Internal Medicine, Surgery, and Anesthesiology, University Hospital of Zurich, Switzerland
Objectives: Most patients with severe pulmonary emphysema referred for lung volume reduction surgery (LVRS) have a long-standing history of cigarette smoking. Coronary artery disease (CAD) predisposes to perioperative cardiac complications. Since symptoms and signs of myocardial ischemia are often absent in patients with severe ventilatory impairment even during exercise, we investigated the prevalence of CAD in candidates for LVRS by angiography.
Design: We prospectively studied the prevalence of CAD by angiography and assessed the CAD risk factor profile in 41 candidates for LVRS (26 men, 15 women; mean age, 66±6.8 years; range, 52 to 76 years), who had no current symptoms or a history of myocardial ischemia.
Results: In six patients (15%), asymptomatic but significant coronary lesions (>70% stenosis) were detected. In five patients, these findings altered the clinical management. Patients with CAD had significant higher cholesterol levels, tended to have smoked more, and had more often additional vascular risk factors.
Conclusions: We found a high prevalence of angiographically significant but clinically silent CAD in this particular population of heavy smokers with advanced emphysema.
Key Words: coronary artery disease • lung volume reduction surgery • pulmonary emphysema
Submitted on October 28, 1996
Accepted on April 21, 1997
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