simultaneous echocardiogram ( ucg ) , electrocardiogram ( lead dii ) ( ecg ) and bp cuff measurement were performed on 12 subjects without cardiomegaly and clinical evidence of heart failure , immediately before a 30 second intravenous injection of amiodarone and every 30 seconds over a period of 6 minutes after drug administration .
C0018800
cardiomegaly
C0018787
heart