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European Heart Journal 1998 19(5):737-741; doi:10.1053/euhj.1997.0836
Copyright © 1998 by the European Society of Cardiology.
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Attenuated physical exercise capacity in smokers compared with non-smokers after coronary angioplasty despite similar luminal diameters

JørgensenB. f1, K. Endresen, K. Forfang, S. Simonsen and E. Thaulow

Department of Cardiology, Rikshospitalet, University of Oslo, Oslo, Norway

accepted October 30, 1997

Aims

To study the impact of smoking on the change in exercise capacity in patients treated with coronary angioplasty.

Methods

Three hundred and sixty-eight men below 70 years of age eligible for percutaneous transluminal coronary angioplasty without previous coronary interventions were consecutively enrolled. Of the 334 patients (90·8%) who completed the study 77 (23·1%) were current smokers. Exercise tests were performed before percutaneous trans-luminal coronary angioplasty, 2 and 19±2·4 weeks after percutaneous transluminal coronary angioplasty. Coronary angiography was done in 333 patients (99·7%) (at mean 19±2·4 weeks). The angiograms were analysed quantitatively.

Results

There were no differences in the clinical and angiographic characteristics among the groups except for age. The non-smokers were older than the smokers (55·7 vs 52·4 years (P=0·001)). Exercise capacity was equal before percutaneous transluminal coronary angioplasty in both groups (17·6 vs 16·5Wxmin–1xkg–1). Non-smokers had a significantly higher increase in exercise capacity than smokers from baseline to 2 weeks after percutaneous transluminal coronary angioplasty (mean difference 4·3Wxmin–1xkg–1(95%CI: 2·3 to 6·2;P<0·001)), and from baseline to 19 weeks after percutaneous transluminal coronary angioplasty (mean difference 3·9Wxmin–1xkg–1(95%CI: 1·6 to 6·2;P<0·001)).

Conclusion

A clinical benefit from percutaneous transluminal coronary angioplasty was seen in both groups as judged from exercise testing. Smokers had a substantially lower increase in exercise capacity than non-smokers, indicating an attenuated benefit from percutaneous transluminal coronary angioplasty among smokers.

Key Words: Angioplasty • smoking • exercise testing • exercise capacity • coronary artery disease

f1 Correspondence: Dr B. Jørgensen, Kardiologisk seksjon, Medisinsk avdeling B, Rikshospitalet, N-0027 Oslo, Norway.


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