Abstract
Viral heart disease comprises of two cardiovascular entities being evoked by viral infection: acute viral myocarditis and viral cardiomyopathy. Viral myocarditis may completely resolve leaving no traceable sign or cause ongoing inflammation with subsequent development of hypokinetic dilated/non-dilated cardiomyopathy. The exact epidemiology of viral myocarditis remains unknown due to its sometimes asymptomatic course, but according to the Global Burden of Disease Study 2019, the prevalence of myocarditis in young adults is estimated to range between 6.1 per 100,000 in men and 4.4 per 100,000 in women, with the most common viral etiology. According to the literature viral genome can be found in considerable percentage (up to 67,4%) of endomyocardial biopsy specimens obtained from patients with idiopathic left ventricular dysfunction- suggesting viral etiology of the cardiomyopathy. In this review we would like to enlighten most common types of arrhythmias and conduction disorders as well as their prevalence in patients with viral heart disease. Moreover, our paper depicts probable pathological mechanisms in which viruses induce arrhythmias and cardiac conduction system disease in both, acute viral infection and chronic viral disease. We would also like to highlight unresolved problem of sudden death protection in the course of acute myocarditis.
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