Measurement of the RT Interval on ECG Records During Electron-Beam CT

The R wave of the electrocardiogram is used widely as a trigger for cardiac imaging. This study was designed to determine the optimal interval between the R wave and end systole for triggering of electron-beam computed tomography (CT) in a group of patients with various heart rates who are undergoing assessment for coronary artery calcification.A total of 862 consecutive asymptomatic patients referred for screening with electron-beam CT for...