. Author manuscript; available in PMC: 2013 Jun 10.

Published in final edited form as: J Cardiovasc Comput Tomogr. 2012 Apr 7;6(3):154–163. doi: 10.1016/j.jcct.2012.04.005

Table 2.

Heart rate thresholds for scan mode selection for coronary angiography on state-of-the art CT scanners

Scan mode	Heart rate threshold, bpm
Prospective ECG-triggered helical	≤60 bpm
Prospective ECG-triggered axial	≤65–80 bpm^*
Retrospective ECG-gated helical	≥65–80 bpm^*

Threshold is higher for scanners with higher temporal resolution.

Bpm, beats per minute; CT, computed tomography; ECG, electrocardiogram.