Camrelizumab-Related Lethal Arrhythmias and Myasthenic Crisis in a Patient with Metastatic Thymoma

Figure 1

Progressive alterations on ECG. (a) Sinus rhythm and normal cardiac conduction before immune checkpoint inhibitor use. (b) New-onset left anterior fascicular branch block on admission. (c) New-onset complete right branch block plus left anterior fascicular branch block, namely bifascicular branch block. (d) Intermittent second degree atrioventricular block, with frequent premature atrial contractions, ST segment elevation, and poor R-wave progression in precordial leads. (e) Third degree atrioventricular block. Blue arrows indicating regular P waves. (f) Ventricular tachycardia (VT) with heart rate of 230 beats/min.