Kosin Medical Journal

Original article

Comparison of the radiation dose between dual-acquisition coronary computed tomography angiography and coronary angiography for coronary spasm: Soo-Jin Kim, Moo Hyun Kim, Eun-Ju Kang; Kosin Med J. 2022;37(1):46-51. Published online March 16, 2022; DOI: https://doi.org/10.7180/kmj.21.035

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Abstract PDF PubReader ePub: Background
Coronary computed tomography angiography (CCTA) is an imaging technique that can be used to evaluate and diagnose coronary artery stenosis. Dual-acquisition CCTA (DA-CCTA) with additional nitrate infusion is a promising alternative noninvasive diagnostic tool, as conventional CCTA has limitations in the diagnosis of variant angina compared to conventional angiographic coronary spasm tests. However, DA-CCTA may pose a potential risk due to radiation exposure. We compared the radiation dose between DA-CCTA and the coronary angiographic spasm provocation test.
Methods
Patients with clinically suspected variant angina at a single hospital between March 2013 and October 2018 were screened and underwent DA-CCTA or a coronary angiographic spasm provocation test. The effective radiation dose required for each approach was compared.
Results
In total, 211 suspected variant angina patients underwent DA-CCTA or the coronary angiographic spasm provocation test. Of these, 49 patients (mean age, 59.8 years; 67.3% men) received DA-CCTA and 162 patients (mean age, 60.5 years; 66.2% men) received a coronary angiographic spasm provocation test. There was a significant difference in the effective radiation dose, with a median dose of 5.1 mSv (interquartile range [IQR], 4.1–9.2 mSv) required for DA-CCTA and a median dose of 10.9 mSv (IQR, 8.4–15.2 mSv) for the coronary angiographic spasm provocation test (p<0.001).
Conclusion
DA-CCTA showed a significantly lower effective radiation dose than the coronary angiographic spasm provocation test required to diagnose variant angina.

Case report

Percutaneous coronary stenting in guide-induced aortocoronary dissection: Jung Ho Heo; Kosin Med J. 2007;22(1):296-300. Published online June 30, 2007

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