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KMID : 1149520220060010016
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Cardiovasclar Imaging Asia
2022 Volume.6 No. 1 p.16 ~ p.18
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Recurrent Paroxysmal Atrial Tachycardia Triggered by Deep Inspiration During Contrast Enhanced Computed Tomography Coronary Angiography
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Yew Min Sen
Tan Kenny Wee Kian
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Abstract
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A 64-year-old lady underwent CT coronary angiography. Rhythm tracing showed initial sinus bradycardia with sudden onset of atrial tachycardia (AT) during contrast administration and breath-holding, which resolved almost immediately after the scan. Motion artifacts were seen. This recurred during a repeat attempt, but self-terminated before the images were acquired. We hypothesize that the AT may be contributed by both respiratory cycle-dependent AT and use of iodinated contrast. Although rare and not previously reported in the setting of cardiac CT, we demonstrated that respiratory cycle-dependent AT can be triggered by conditions universally present during coronary CT, namely the need for deep inspiration, breath holding and intravenous iodinated contrast. This poses a unique challenge for coronary CT imaging and greater awareness of this entity is needed amongst CT technologists and physicians.
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KEYWORD
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Multidetector computed tomography, Coronary angiography, Tachycardia, ectopic atrial, Breath holding, Contrast media
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FullTexts / Linksout information
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Listed journal information
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