Abstract: A first cardiac signal associated with an activity of a first implant site of a heart during a cardiac cycle is sensed. A second cardiac signal is sensed using an intrapericardial lead located on an epicardial surface proximate a second implant site of the heart. The second cardiac signal is associated with an activity of the second implant site during the cardiac cycle. A timing delay between the activity of the first implant site and the activity of the second implant site is obtained and analyzed to determine if the intrapericardial lead location is appropriate. The preceding is repeated until an appropriate intrapericardial lead location is determined. Other measurements obtained during implant determine whether the intrapericardial lead location is at or near slow conduction zone and whether the intrapericardial lead is placed at the location having the greatest mechanical delay. Post implant measurements determine whether the intrapericardial lead has migrated.