Key result
Slow coronary artery flow was associated with significantly higher corrected QT dispersion compared to normal coronary flow (43 ms vs 30 ms, p<0.001).
Why the study?
Does slow coronary artery flow increase QT dispersion in patients with angiographically normal coronary arteries?
Population
120 patients undergoing coronary angiography for chest pain with angiographically normal coronary arteries…
Comparison
Slow coronary artery flow (observational exposure) vs Normal coronary artery flow
Design
Cross-sectional
Authors
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May flag arrhythmia vulnerability in slow flow; hypothesis-generating and should not yet change practice.
Cross-Sectional (n=120)
Yes
Does slow coronary artery flow increase QT dispersion in patients with angiographically normal coronary arteries?
Absolute Event Rate: 43% vs 30%
p-value: p=<0.001
Patients with slow coronary artery flow exhibit significantly increased corrected QT dispersion, suggesting a potential mechanism for increased risk of ventricular arrhythmias in this population.
Atak et al. (2003) conducted a cross-sectional in Slow coronary artery flow (n=120). Slow coronary artery flow vs. Normal coronary artery flow was evaluated on Corrected QT dispersion (QTcd) (p=<0.001). Slow coronary artery flow was associated with significantly higher corrected QT dispersion compared to normal coronary flow (43 ms vs 30 ms, p<0.001).
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