64列冠動脈CT検査におけるβ遮断薬静脈投与による心拍数コントロールの効果に関する検討

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タイトル別名
  • Examination of the Effectiveness of Heart Rate Control Using Intravenous β-blocker in 64-slice Coronary Computed Tomography Angiography
  • 臨床技術 64列冠動脈CT検査におけるβ遮断薬静脈投与による心拍数コントロールの効果に関する検討
  • リンショウ ギジュツ 64レツ カンドウミャク CT ケンサ ニ オケル vシャダンヤク ジョウミャク トウヨ ニ ヨル シンパクスウ コントロール ノ コウカ ニ カンスル ケントウ
  • Examination of the Effectiveness of Heart Rate Control Using Intravenous ^|^beta;-blocker in 64-slice Coronary Computed Tomography Angiography

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The purpose of this study is to clarify the effectiveness of the use of β-blocker in coronary computed tomography angiography (CCTA). In 1783 patients, heart rate was controlled by propranolol injection to patients with heart rates of 61 bpm or more. As a result, the scan heart rate (58.8±6.5 bpm) decreased significantly compared with the initial heart rate (72.7±9.4 bpm). Prospective gating method was used by 61.9% including 64.3% of the intravenous β-blocker injection group. Moreover, daily use of oral β-blocker had influence on reduction of the scan heart rate (daily use group: 60.1±6.5 bpm vs. unuse group: 58.5±6.3 bpm p<0.01). When we evaluated the image quality of CCTA by the score, the improvement of the score was obviously admitted by 65 bpm or less of the scan heart rate. The ratio of scan heart rate that was controlled by 65 bpm or less was decreased in the initial heart rate groups that were 81 bpm or more. The incidence of adverse reactions by the propranolol injection was few, and these instances only involved slight symptoms. Therefore, heart rate control with the use of β-blocker is useful for the image quality improvement of CCTA. This form of treatment can be safely enforced.

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