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Effects of coenzyme Q10 on exercise tolerance in chronic stable angina pectoris.


Kamikawa T, Kobayashi A , Yamashita T




Am J Cardiol


The effects of coenzyme Q10(CoQ10) on exercise performance were studied in 12 patients, average age 56 years, with stable angina pectoris. The study involved a double-blind, placebo-controlled, randomized, crossover protocol, using multistage treadmill exercise tests. CoQ10(150 mg/day in 3 daily doses) was administered orally for 4 weeks, tended to reduce anginal frequency from 5.3 +/- 4.9 to 2.5 +/- 3.3 attacks for 2 weeks and nitroglycerin consumption from 2.6 +/- 2.8 to 1.3 +/- 1.7 tablets for 2 weeks compared with patients receiving the placebo, but the reduction was not statistically significant. Exercise time increased from 345 +/- 102 seconds with placebo to 406 +/- 114 seconds during CoQ10 treatment (p less than 0.05). The time until 1 mm of ST-segment depression occurred increased from 196 +/- 76 seconds with placebo to 284 +/- 104 seconds during CoQ10 treatment (p less than 0.01). During the exercise test, ST-segment depression, heart rate and pressure-rate product at the same and at the maximal workload showed no significant difference between patients after placebo and CoQ10 administration. The average CoQ10 plasma concentration increased from 0.95 +/- 0.48 microgram/ml to 2.20 +/- 0.98 microgram/ml after CoQ10 treatment. This increase was significantly related to the increase in exercise duration (r = 0.68, p less than 0.001). Only 1 patient had a loss of appetite, but continued therapy. This study suggests that CoQ10 is a safe and promising treatment for angina pectoris.

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