Abnormal EKG J wave 2013-04-07T02:11:05Z The J wave is a positive convex deflection that occurs at the junction of the QRS complex and ST segment, the J-point. J waves can be seen in hypothermia when the core body temperature falls below 32 degrees C. Then, they occur most prominently in the inferior leads: II, III, and aVF and the precordial leads: V5-V6. J waves can also be observed in other conditions such as some forms of Brugada syndrome. Osborne waves HP:0012272 UMLS:C4018858 EKG J waves