- screening 12-lead ECG showing a baseline QT interval as corrected by Fridericia's formula (QTcF) >470 msec. · Known chronic obstructive pulmonary disease (COPD) (defined as a forced expiratory volume [FEV] in 1 second <60% of predicted normal), persistent asthma, or a history of asthma within the last 2 years (intermittent asthma is allowed). Participants with known or suspected COPD or asthma must have a FEV1 test during screening.