Send to

Choose Destination
J Cardiopulm Rehabil Prev. 2011 Mar-Apr;31(2):125-32. doi: 10.1097/HCR.0b013e3181f1fd65.

Effect of propionyl-L-carnitine on a background of monitored exercise in patients with claudication secondary to peripheral artery disease.

Author information

University of Colorado School of Medicine, Division of Cardiology and CPC Clinical Research, Aurora, Colorado 80045, USA.



Exercise training is established for the treatment of peripheral artery disease; however the additional benefit of pharmacologic therapy with exercise has not been studied. This trial tested the hypothesis that propionyl-L-carnitine (PLC), in combination with monitored home-based exercise training, would improve treadmill peak walking time (PWT) over exercise training alone.


Subjects with claudication were randomized to 6 months of therapy with PLC (2 g daily, n = 32) or matching placebo (n = 30). After supervised exercise instruction, all subjects performed exercise training sessions 3 times a week for 30 to 50 minutes/session and compliance was monitored by activity monitors and diary. Change in PWT was the primary outcome measure with other functional assessments predefined as secondary endpoints.


After 6 months of treatment, patients randomized to training and placebo had an increase in PWT of 218 ± 367 seconds, while those randomized to training plus PLC had an increase of 266 ± 243 seconds, P = .258. Across the total study cohort, the dose of exercise training (total number of minutes of exercise of at least moderate intensity) was correlated with the change in PWT (r = 0.259, P = .048), suggesting that the monitored exercise was effective in improving walking performance in both treatment arms.


In all subjects, the increase in PWT from baseline to month 6 was correlated with the amount of exercise training. However, although favoring PLC, the combination of exercise training and PLC did not result in a statistically significant benefit in peak treadmill performance or quality of life compared with exercise alone.


[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wolters Kluwer
Loading ...
Support Center