Complete Heart Block Lacking Functional Anatomical Impairment in the Conduction System

Abstract

Introduction: Complete heart block also known as third-degree atrioventricular block (AV block) is a condition in which there is no conduction of the impulse produce in the sinoatrial node (SA node) in the atrium to the ventricle.1 Complete heart block may be congenital or acquired. There are certain conditions which can lead to third-degree heart block, commonest being the coronary ischemia. Initially there may be first degree atrioventricular block (AV block), second degree atrioven-tricular block (AV block), bundle branch block or bifasicular block ultimately leading to complete heart block. In most cases third-degree AV block presents with acute myocardial infarction.2,3 A 45 years old male with no known comorbids and without any risk factors for coronary heart disease coming with a short duration of complaints of dizziness and vertigo was diagnosed as a case of complete heart block without any functional and anatomical impairment in conduction system. Key Words: Complete Heart Block, Atrioventricular Block (AV block), Sinoatrial Node (SA Node), Coronary Ischemia, Bifasicular Block, Myocardial Infarction, Conduction System.