title: Heart rate control with single administration of a long-acting β-blocker at bedtime before coronary computed tomography angiography.
abstract: BACKGROUND
  Beta-blockers are used to control the heart rate prior to coronary computed tomography (CT) angiography. However, in-hospital administration is time-consuming, and it is hard to decrease the heart rate to <60 beats per minute (bpm) when the initial heart rate is increased. In this study, we examined whether the single administration of long-acting β-blocker at bedtime before angiography is effective for achieving the target heart rate.
  
  
  RESULTS
  A total of 314 consecutive patients with a resting heart rate >60bpm who underwent coronary CT angiography were retrospectively collected. Either bisoprolol or atenolol was orally administered the night before to 166 patients (beta group), and no additional medication was administered to the other 148 patients (control group). When the heart rate was >60bpm on arrival, a β-blocker or verapamil was orally administered at the discretion of the physician. Although the baseline heart rate was not significantly different between the groups, the β-blocker treatment the night before significantly reduced the heart rate compared to control group upon arrival at the hospital and at the time of angiography. The rate of achievement of a heart rate ≤60bpm on arrival at the hospital was significantly higher in the beta group, and even after the additional treatment.
  
  
  CONCLUSIONS
  Bedtime administration of a long-acting β-blocker the night before coronary CT angiography is an effective option to achieve the target heart rate at the time of examination.
authors.affiliation: Department of Cardiology, Saga-ken Medical Centre Koseikan, Saga, Japan. Electronic address: k-sadamatsu@umin.ac.jp.
authors.forename: Kenji
authors.initials: K
authors.lastname: Sadamatsu
authors.affiliation: Department of Nursing, Saga-ken Medical Centre Koseikan, Saga, Japan.
authors.forename: Sachiko
authors.initials: S
authors.lastname: Koide
authors.affiliation: Department of Nursing, Saga-ken Medical Centre Koseikan, Saga, Japan.
authors.forename: Kayoko
authors.initials: K
authors.lastname: Nakano
authors.affiliation: Department of Cardiology, Saga-ken Medical Centre Koseikan, Saga, Japan.
authors.forename: Keiki
authors.initials: K
authors.lastname: Yoshida
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage*; D000368:Aged; D001262:Atenolol / Q000008:administration & dosage*; D017298:Bisoprolol / Q000008:administration & dosage*; D017023:Coronary Angiography / Q000379:methods*; D005260:Female; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D057234:Preoperative Period; D012189:Retrospective Studies; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D000319:Adrenergic beta-Antagonists; D001262:Atenolol; D017298:Bisoprolol
keywords: Beta adrenergic receptors; Coronary disease; Heart rate; Tomography