Hepatitis C virus infection could affect the pathogenesis of ischemic heart diseases in northern Japan.

Aims: Previously, our group reported that lymphotropic hepatitis C virus (HCV) could induce various kinds of immune dysfunctions. The immune dysfunctions could cause vascular disease by inducing cryoglobulinemia. It has been reported that ischemic heart diseases might be caused by HCV. However, the infectious rate of HCV in patients with ischemic heart disease has not been clarified in northern Japan. Therefore, we tried to determine the rate of HCV infectivity in patients with ischemic heart disease. Methods: The target patients of this study were automatically selected using an electronic medical record system to exclude selection bias. The system identified 16 484 patients with ischemic heart disease who were included in this study. In addition, 12 902 subjects who had received medical checkups were included as the control group. Results: The positive rate of HCV antibody among the patients with ischemic disease in our hospital was 2.58%, which was significantly higher (P < 0.01) than in the medical checkup patients (0.84%). The positive rate of HCV antibody in the patients with ischemic heart disease in each age group was significantly higher than in the corresponding age groups of the medical checkup patients. The rate of chronic kidney disease in HCV antibody‐positive patients treated by percutaneous coronary intervention (PCI) was significantly higher than in HCV antibody‐negative patients treated by PCI (P = 0.02). Conclusions: Hepatitis C virus infection might be associated with the pathogenesis of ischemic heart disease and HCV antibody positivity might be a risk factor for ischemic heart disease in northern Japan. [ABSTRACT FROM AUTHOR]