Abstract
The incidence of cardiovascular disease in patients with end-stage renal disease undergoing long-term maintenance hemodialysis is excessively high. The reason for this excess morbidity and mortality has remained unclear. Cigarette smoking is one factor that has been associated with increased cardiovascular risk. To learn more about the effects of tobacco smoking in these patients, nicotine levels were assayed in the serum of 10 patients with end-stage renal disease undergoing maintenance hemodialysis. Specimens were obtained before and after smoking one cigarette and following dialysis or an equivalent period in control subjects. Serum nicotine levels (± SEM) in control subjects measured 19.0 ± 7.2 ng/ml initially, 36.1 ± 8.2 ng/ml after smoking, and 9.3 ± 3.5 ng/ml after a period of 4.35 hours. These compare with respective values of 76.6 ± 16.8 ng/ml (p < 0.004), 132.9 ± 19.7 ng/ml (p < 0.001), and 51.9 ± 10.5 ng/ml (p < 0.001) in patients undergoing hemodialysis. These data demonstrate markedly higher nicotine levels in hemodialysis patients compared with control subjects, which may have serious implications regarding morbidity and mortality.
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