Key result
Classic accessory pathways exhibited significantly different ECG characteristics compared to benign pathways, including shorter PR-interval (102 vs 120 ms, P<0.0001) and longer QRS-duration.
Why the study?
Pre-excitation associated with classic accessory pathways can lead to sudden cardiac death, but it is difficult to differentiate from benign accessory pathways such as nodofascicular fibers.
Does noninvasive testing (ECG and exercise) differentiate classic from benign accessory pathways in patients with suggested pre-excitation?
Population
96 patients presenting with ventricular pre-excitation on ECG
Comparison
Classic accessory pathways vs benign or no accessory pathways
Design
Retrospective review
Authors
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ECG differences may aid pathway classification; hypothesis-generating and requires prospective validation before clinical use.
Observational (n=96)
Does noninvasive testing (ECG and exercise) differentiate classic from benign accessory pathways in patients with suggested pre-excitation?
Absolute Event Rate: 102% vs 120%
p-value: p=< .0001
Classic and benign accessory pathways exhibit different ECG characteristics, which may aid in risk stratification but do not replace the need for invasive testing.
Robinson et al. (2019) conducted an observational in Ventricular pre-excitation on ECG (n=96). Classic accessory pathway vs. Benign accessory pathway was evaluated on PR-interval (ms) (p=< .0001). Classic accessory pathways exhibited significantly different ECG characteristics compared to benign pathways, including shorter PR-interval (102 vs 120 ms, P<0.0001) and longer QRS-duration.
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