ECG J wave syndromes: hypothermia, early repolarization, hypercalcemia & Brugada syndrome

ECG J wave syndromes: hypothermia, early repolarization, hypercalcemia & Brugada syndrome

J-wave syndromes: early repolarization pattern, Brugada syndrome, hypercalcemia and hypothermia The J wave – also referred to as Osborn’s wave – is defined as a wave occurring at the J point ( Figure 1 ). Conditions in which the J wave occurs may be referred to as J wave syndromes. J waves are typically most pronounced in the anterolateral (V3, V4, V5, V6) and inferior (II, aVF and III) leads. There are four principal causes of J waves, namely hypothermia,  Brugada syndrome ,  early repolarization  and  hypercalcemia . Figure 1. Osborn wave (J wave). These waves occur due to hypothermia, hypercalcemia, early repolarization and Brugada syndrome. Early repolarization ,  Brugada syndrome  and  hypercalcemia  are discussed separately. Please refer to these articles.  ECG  examples of each condition are presented below. The ECG in Brugada syndrome Brugada syndrome is a rare channelopathy (an electrical disorder caused by mutations in cardiac ion channels) which predisposes the individual to syncope, ventricul…

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