تاثير يك دوره برنامه تمريني تركيبي بر عملكرد انقباضي بطن چپ بيماران عروق كرونر

Effect of Concurrent Training on Left Ventricular Contractile Function in Patients with Coronary Artery Disease

Methods: Twenty four patients with coronary artery disease (mean age of 60±6 yrs; mean weight 74±12 kg; and mean body mass index 26±4) were randomly divided to two subgroups, experimental (n=12) and control (n=12) groups. The experimental group participated in 3 months concurrent training, 3 times/week for 60 to 80 minutes at 70% to 85% of maximum heart rate (MHR) and 40% to 60% of one repetition maximm (1RM). Investigation variables were assessed at baseline and at the end of the protocol by the impedance cardiography method. Findings: A significant training effect was documented by a decrease in heart rate and blood pressure at rest. Acceleration index (ACI) increased from 0.49±0.14 to 0.78±0.24 sec2 (p<0.05). Velocity index (VI) increased from 36±9 to 47±8 msec (p<0.05). Left cardiac work (LCW) increased from 5±1 to 7±2 kg m (p<0.05). Left cardiac work index (LCWI) increased from 3±1 to 4±1 kg m/m2 (p<0.05). Pre-ejection period (PEP) decreased from 91±12 to 68±12 msec (p<0.05). Systolic time ratio (STR) decreased from 28±5 to 21±6 (p<0.05). The left ventricular ejection time (LVET) did not change. Conclusion: We conclude that concurrent training may improve myocardial contractile function in some patients with CAD