CT Angiography and Stroke Risk in Emergency Patients with Vertigo
Author Information
Author(s): Muacevic Alexander, Adler John R, Jacob Johanna L, Rashid Urouj, Lee Chel H, Menon Bijoy K, Lin Katie
Primary Institution: University of Calgary
Hypothesis
Does CT with angiography (CTA) improve risk stratification for stroke or transient ischemic attack (TIA) in emergency department patients presenting with vertigo?
Conclusion
Patients who received CTA at their index visit had significantly higher odds of being diagnosed with TIA or stroke within 30 days.
Supporting Evidence
- 20.7% of patients who received CTA were diagnosed with stroke or TIA within 30 days compared to 1.2% in the No CTA group.
- The odds ratio for stroke or TIA diagnosis was 18.3 after adjusting for relevant factors.
- Patients in the CTA group had a longer average ED length of stay by 114 minutes.
- Patients in the CTA group had a shorter average hospital stay by 2.2 days.
Takeaway
If you go to the emergency room with dizziness and get a special scan called CTA, you're much more likely to find out if you have a serious problem like a stroke.
Methodology
This retrospective study analyzed data from four tertiary care emergency departments over one year, comparing outcomes between patients who received CTA and those who did not.
Potential Biases
Potential biases may arise from the subjective judgment of clinicians in ordering imaging.
Limitations
The study's retrospective nature and reliance on administrative data limited the ability to account for certain clinical variables.
Participant Demographics
The study included adult patients (18 years or older) presenting with vertigo, with a mean age of 64 in the CTA group and 55 in the No CTA group.
Statistical Information
P-Value
p<0.001
Confidence Interval
95% CI: 15.03-33.02
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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