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KMID : 1149020210230020029
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Journal of Korean Society of Computed Tomographic Technology
2021 Volume.23 No. 2 p.29 ~ p.37
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When is the Optimal Time to Control High Heart Rate with Ivabradine during Coronary CT Angiography?
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Nam Soo-Jin
Jeon U-In
Kim Woong-Ki
Ko Sung-Min
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Abstract
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Hearts vulnerable to movement are difficult to image during the CCTA test, and the patient's respiration and heart rate are factors that determine the quality of the image. Proceeding a cardiac CT examination by properly controlling the heart rate means that the optimal image can be obtained without significant changes in the thickness and location of the cardiovascular vessels that vary depending on the heart rate. If a drug that controls heart rate is administered to patients with high heart rate, the examination for optimal image acquisition becomes easier. As a result of conducting a study to determine when the effect of lowering the heart rate by taking ivabradine and when the maximum effect appeared, the effect began to appear 40 minutes after taking it, and the heart rate decreased to a maximum within 1 hour. In addition, the difference between the maximum and minimum heart rate values, that is, the range of the heart rate fluctuation has been reduced. The utilization of ibabradine in CCTA examination not only facilitates protocol selection but also reduces the appropriate range for image acquisition intervals, minimizing patient exposure dose and improving image quality.
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KEYWORD
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ivabradin, optimal heart rate, coronary computed tomography angiography, fluctuation range
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