Objective: It was the aim of this study to investigate the impact of pulsed magnetic field (PMF) on ischemic myocardium, though it has been reported that PMF treatment is a safe and effective method to facilitate bone and cutaneous wound healing. Methods: In this report, we describe a study in which 10 Hz 4 mT PMF and 15 Hz 6 mT PMF was used to treat rats with myocardial infarction (MI). Results: After 28 days of treatment, the rats treated with 15 Hz 6 mT PMF exhibited decreased left ventricular end-diastolic pressure and accelerated maximum dp/dt of left ventricular pressure when compared with the untreated MI and the MI + 10 Hz 4 mT groups. Additionally, capillary density was increased and infarction area size was decreased in the MI + 15 Hz 6 mT group. Furthermore, the plasma vascular endothelial growth factor concentration and the protein expression of vascular endothelial growth factor receptor 2 in myocardial tissue were increased in rats of the MI + 15 Hz 6 mT group. Conclusion: This study shows that 15 Hz 6 mT PMF promotes myocardial angiogenesis and improves cardiac function after MI in rats. This suggests that there is a potential use for some PMF signal strengths in ischemic myocardial disease.

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