Question:

Irregular tachycardia may result in
1. Image artifacts
2. Increased radiation to patient
3. Both 1&2
4. No significant adverse impact
5. The study is contraindicated





Answer:

The correct answer for the question "Irregular tachycardia may result in " is:

3. Both 1&2



Explanation

Irregular tachycardia can result in both image artifacts and increased radiation to the patient as seen in this case. EKG dose modulation technique for diminishing radiation to the patient requires regular heart rate and works best with lower heart rate. However, the study can still be performed in patients with irregular heart rates or atrial fibrillation, provided you have newer DSCT scanner with higher temporal resolution as shown by the investigators in reference #3.



From the manuscript:
Banding and Step-Stair Artifacts on the Cardiac-CT Caused By Pseudo-Ectopic Beats
Radiology Case. 2009 Jun; 3(6):3-8


This article belongs to the Cardiac section.




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From the manuscript

Banding and Step-Stair Artifacts on the Cardiac-CT Caused By Pseudo-Ectopic Beats

Free full text article: Banding and Step-Stair Artifacts on the Cardiac-CT Caused By Pseudo-Ectopic Beats

Abstract
Step-stair and banding artifacts may result from irregular ventricular rhythm caused by atrial fibrillation or premature ectopic ventricular contractions. In the case reported here, severe banding and misalignment artifacts occurred due to electrocardiographic noise mimicking ectopic beats. Severe EKG noise or pseudo-ectopic beats may cause rare but serious artifacts during cardiac-CT acquisition. Vendor-provided software for correcting ectopic beats can be used to remove pseudo-ectopic beats and eliminate artifacts caused by the EKG noise. All efforts should be made to prevent this kind of problem from happening in the first place.






References



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