3. The subject would remain in the left lateral decubitus ("safe position" for individuals with suspected or confirmed venous air embolism) for four hours. Laboratory tests including cardiac enzymes may be obtained and a member of the study team will re-evaluate with transthoracic echocardiography. If baseline function and hemodynamics return, the subject concludes their recovery period as per normal circumstance for ERCP. In the event the subject has persistent intracardiac air, impaired myocardial function or hemodynamic instability, it would be recommended that the subject stay for observation with telemetry monitoring and further evaluation as needed.