In coronary artery disease (CAD), circulating angiogenic factors have been seen to increase, possibly as a response to ischaemia. Regular physical activity (PA) is recommended for prevention and treatment of CAD, but more research is needed to optimise PA regimes. We investigated the effect of home-based high frequency exercise (HFE) on angiogenic cytokines and cardiac markers in patients with stable CAD.
Design
This was a randomised case-control study
Methods
Sixty-two patients, with stable CAD, were randomised to HFE (n = 33), (aerobic exercise 70% of max, 30 min, five times/week and resistance exercise three times/week), performed at home, or usual lifestyle (control, n = 29). After eight weeks, percutaneous coronary intervention (PCI) was performed in both groups, and the HFE group continued another six months of exercise. Serum vascular endothelial growth factor (VEGF) and stromal derived factor-1 (SDF-1), plasma N-terminal-brain natriuretic peptide (NT-proBNP), high-sensitive troponin T (TnT) and copeptin were analysed.
Results
Data are presented as median (25th, 75th percentile) of relative changes (%) from baseline. Values of p are given for the difference between the HFE and controls. HFE decreased circulating VEGF levels, before PCI (−5% (−15%, −2%)), while VEGF levels increased in the control group (5% (−3%, 20%) p = 0.004). A significant difference in VEGF remained at three months post-PCI (HFE (−1%(−12%, 5%), control (7% (0%, 14%), p = 0.04), but not at six months after PCI. SDF-1, NT-proBNP, TnT and copeptin levels did not differ significantly. In addition, VEGF levels were positively correlated to NT pro-BNP.
Conclusions
Home-based HFE decreased circulating VEGF in patients with stable CAD, suggesting a reduced ischaemic burden. HFE does not increase markers of cardiac dysfunction, suggesting that it is a safe therapeutic intervention in these patients.
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