In Am J Roentgenol 2006 Jun;186(6 Suppl 2):S341-5 - "Beta-blockers for cardiac CT: a primer for the radiologist" Pannu HK et al discuss the role of Beta Blockers for Cardiac CT.
"A low and regular heart rate is necessary for optimal visualization of the coronary arteries on CT and can be achieved by the administration of medications. Beta-blockers can be safely given, orally or IV, to most patients to lower the heart rate for cardiac CT. A protocol can be implemented and patients can be screened for certain contraindications to allow successful administration of these medications by radiologists."
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