Online Appendices
- Appendix 1: Electrocardiogram of a 36-year-old man showing a second-degree Mobitz type I atrioventricular block with intermittent junctional escape. Green lines indicate atrial activation (A); red lines indicate ventricular activation (V).
- Appendix 2: ECG after discharge: a sinus rhythm with normal conduction (PR interval 180 msec, QRS duration 90 msec) and normal repolarization can be appreciated.