Radiation-Dose-Lowering Effects of Landiolol Hydrochloride in Coronary Angiography Using Computed Tomography (DELIGHT)　– A Prospective Multicenter Study –

Teruhito Kido; Teruhito Mochizuki; Masaharu Hirano; Yoshitake Yamada; Ryoichi Tanaka; Suzu Kanzaki; Masahiro Higashi; Masahiro Jinzaki; Kunihiro Yoshioka; Sachio Kuribayashi

doi:10.1253/circj.CJ-15-0962

Ischemic Heart Disease

Radiation-Dose-Lowering Effects of Landiolol Hydrochloride in Coronary Angiography Using Computed Tomography (DELIGHT)　– A Prospective Multicenter Study –

Teruhito Kido, Teruhito Mochizuki, Masaharu Hirano, Yoshitake Yamada, Ryoichi Tanaka, Suzu Kanzaki, Masahiro Higashi, Masahiro Jinzaki, Kunihiro Yoshioka, Sachio Kuribayashi

Author information

Teruhito Kido
Department of Radiology, Ehime University Graduate School of Medicine
Teruhito Mochizuki
Department of Radiology, Ehime University Graduate School of Medicine
Masaharu Hirano
Department of Cardiology, Tokyo Medical University
Yoshitake Yamada
Department of Diagnostic Radiology, Keio University School of Medicine
Ryoichi Tanaka
Department of Cardiovascular Radiology, Memorial Heart Center, Iwate Medical University
Suzu Kanzaki
Department of Radiology, National Cerebral and Cardiovascular Center
Masahiro Higashi
Department of Radiology, National Cerebral and Cardiovascular Center
Masahiro Jinzaki
Department of Diagnostic Radiology, Keio University School of Medicine
Kunihiro Yoshioka
Department of Cardiovascular Radiology, Memorial Heart Center, Iwate Medical University
Sachio Kuribayashi
Center of Diagnostic Radiology, HIMEDIC Imaging Center at Lake Yamanaka

Keywords: Beta-blockers, Coronary computed tomography angiography, Ischemic heart disease, Landiolol hydrochloride

JOURNAL FREE ACCESS FULL-TEXT HTML

2016 Volume 80 Issue 5 Pages 1225-1231

DOI https://doi.org/10.1253/circj.CJ-15-0962

Editorial (80-5 pp. 1106-1107)

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Abstract

Background:Controlling and decreasing the heart rate (HR) of patients during coronary computed tomography angiography (CCTA) is necessary to reduce radiation exposure and improve image quality. This prospective multicenter study aimed to investigate whether HR control with landiolol hydrochloride is useful for reducing radiation exposure during CCTA.Methods and Results:We investigated 219 patients with suspected ischemic heart disease whose pretest HRs were 50–80 beats/min. We measured the HR before and after administration of landiolol hydrochloride and compared the estimated exposure inferred from the HR before administration of landiolol hydrochloride with the actual dose. After administration of landiolol hydrochloride, the mean HR (59.9±6.4 beats/min) at the time of CCTA was significantly lower than before administration (69.3±7.3 beats/min; P<0.001); 80% of the patients had controlled HRs at ≤65 beats/min. HR and blood pressure of all the patients recovered after the scan. The mean radiation dose in all patients was approximately 50% derived from the inferred dose before use of landiolol hydrochloride (4.5±3.2 vs. 9.0±3.7 mSv; P<0.001). There were no adverse events during this study.Conclusions:The use of landiolol hydrochloride during CCTA was safe and resulted in approximately 50% decrease in radiation exposure dose, suggesting the clinical usefulness of this drug. (Circ J 2016; 80: 1225–1231)

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