Effects of Smoking on Coronary Blood Flow Velocity and Coronary Flow Reserve Assessed by Transthoracic Doppler Echocardiography

Abstract

After 4 hours of abstinence from smoking, CFR and CVRI in smokers were similar to those of nonsmokers. However, consecutively smoking two cigarettes acutely reduced CFR and increased CVRI. These findings suggested that smoking could reduce coronary blood flow immediately, even in healthy people.