Changes in Heart Rhythms Associated With Antipsychotic Drug Treatment

"All subjects will be fitted with a device to obtain 24-hour Holter EKG continuous recordings of bipolar leads C5C5R. They will also receive a standard 12-lead EKG recording prior to the placement of the Holter device. The subjects will be asked to keep a diary during the course of the 24 hours to record information such as wake and sleep times and symptoms such as shortness of breath, heart palpitations, lightheadedness, etc.~From each recording, 12 sets of 10 consecutive QRS epochs, plus QRS samplings obtained during sleep will be analyzed by a cardiologist blind to the medication status of subjects."