title: Effect of a single 20-mg tablet of Atorvastatin on brachial artery blood flow in normolipidemic male smokers versus nonsmokers.
abstract: This study evaluated the acute effect of statin administration in smokers. We conducted a prospective study to determine the acute effect (24 hours) of single-dose atorvastatin (20 mg) on brachial artery endothelial function using vascular ultrasonography (flow-mediated vasodilation [FMD]) and blood flow in normolipidemic smokers (10 men, 42 +/- 9 years of age) and healthy nonsmokers (10 men, 39 +/- 7 years of age). Atorvastatin increased brachial artery percent FMD in smokers from 4.1 +/- 1.4% to 5.7 +/- 1.7% (p <0.0005), whereas we found no significant change after atorvastatin in nonsmokers (from 5.8 +/- 1.2% to 5.9 +/- 1.2%, p = NS). The velocity time integral also showed a significant increase as percent FMD in smokers 24 hours after taking atorvastatin (from 19 +/- 11 to 25 +/- 12 cm, p <0.05), whereas no significant change occurred in nonsmokers (from 18 +/- 9 to 19 +/- 10 cm, p = NS). Baseline brachial artery diameter significantly dilated in smokers after taking atorvastatin compared with before taking atorvastatin (from 4.23 +/- 0.5 to 4.35 +/- 0.4 mm, p <0.05), but did not change in nonsmokers (from 4.26 +/- 0.6 to 4.31 +/- 0.6 mm, p = NS). In conclusion, single-dose atorvastatin restores endothelial function and increases brachial artery blood flow in normolipidemic men smokers within 24 hours. These findings suggest early benefits of statin therapy on endothelial function in smokers.
authors: Division of Cardiology, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.
authors: Kiyoshi
authors: K
authors: Iida
authors: Sorel
authors: S
authors: Goland
authors: Takashi
authors: T
authors: Akima
authors: Huai
authors: H
authors: Luo
authors: Yochai
authors: Y
authors: Birnbaum
authors: Robert J
authors: RJ
authors: Siegel
mesh_terms: D000328:Adult; D000924:Anticholesteremic Agents / Q000494:pharmacology*; D000069059:Atorvastatin; D001916:Brachial Artery / Q000000981:diagnostic imaging / Q000187:drug effects*; D004730:Endothelium, Vascular / Q000187:drug effects; D006538:Heptanoic Acids / Q000494:pharmacology*; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000494:pharmacology*; D006940:Hyperemia / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011758:Pyrroles / Q000494:pharmacology*; D012039:Regional Blood Flow / Q000187:drug effects; D012907:Smoking / Q000503:physiopathology*; D013997:Time Factors; D018608:Ultrasonography, Doppler; D014655:Vascular Resistance / Q000187:drug effects; D014664:Vasodilation / Q000187:drug effects
chemical_list: D000924:Anticholesteremic Agents; D006538:Heptanoic Acids; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D011758:Pyrroles; D000069059:Atorvastatin