Abstract

Complete atrio-ventricular (AV) block etiology may be either functional (autonomic, metabolic/endocrine disease or drug-related), which tends to be reversible, or structural, characterized by fibrosis of myocardial conduction tissue and often related to acute and chronic coronary artery disease, infectious disease (Lyme, Chagas disease), congenital heart disease, inflammatory disease (systemic lupus erythematosus, rheumatoid arthritis), infiltrative disease (amyloidosis, sarcoidosis, hemochromatosis), cancer (lymphoma, mesothelioma, melanoma), and radiation therapy [1].

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