Lyme Carditis and High-Degree Atrioventricular Block

Canada has seen a sixfold increase in Lyme disease since being nationally notifiable in 2009. This is the first Canadian series on Lyme carditis manifested as high-degree atrioventricular block. We report 5 recent cases presented over a 2-year period. The variation of nonspecific presentations requires a high index of suspicion for prompt diagnosis and correct management. Recognizing this early would curtail the progression of conduction disorders and potentially avoid permanent pacemaker implantation. (C) 2018 Elsevier Inc. All rights reserved.