We highlight a diagnostic challenge in a patient with dyspnea on exertion due to radiation therapy-induced severe first-degree atrioventricular block and how permanent His bundle pacing was helpful in overcoming these symptoms. (Level of Difficulty: Intermediate.).
Keywords: AV, atrioventricular; ECG, electrocardiography; HB, His bundle; HBP, His bundle pacing; RBBB, right bundle branch block; RV, right ventricular; cardiac pacemaker; cardiac resynchronization therapy; electroanatomic mapping; electrocardiography; electrophysiology; shortness of breath.
© 2020 The Authors.