- Participant has an ECG (per examination and interpretation of a cardiologist) with clinically significant findings, or features that would interfere with the assessment of myo/pericarditis, including any of the following: a) conduction disturbance (complete left or complete right bundle branch block or nonspecific intraventricular conduction disturbance with QRS >=120 millisecond [ms], PR interval >=220 ms, any 2nd or 3rd degree AV block, or QTc prolongation [>450 ms]); b) significant repolarization (ST segment or T wave) abnormality; c) significant atrial or ventricular arrhythmia, frequent atrial or ventricular ectopy (for example frequent premature atrial contractions, 2 premature ventricular contractions in a row); d) ST elevation consistent with ischemia, or evidence of past or evolving myocardial infarction