Key result
QRS duration differs significantly by sex and race, measuring 97.4, 99.8, 101.6, and 104.8 ms at an RR interval of 1 s in African females, Caucasian females, African males, and Caucasian males (P<0.001).
Why the study?
Does QRS duration differ by sex and race in healthy subjects?
Observational (n=523)
Does QRS duration differ by sex and race in healthy subjects?
p-value: p=<0.001
QRS duration varies significantly by both sex and race, suggesting that current QRS duration cutoffs for therapies like cardiac resynchronization may need to account for these demographic factors.
No takes yet. Share an insight, caveat, or question.
May support sex- and race-specific QRS thresholds; leaves open impact on CRT eligibility in prospective data.
Hnatkova et al. (2016) conducted an observational in Healthy subjects (n=523). Sex and race was evaluated on QRS duration at RR intervals of 1 and 0.5 s (p=<0.001). QRS duration differs significantly by sex and race, measuring 97.4, 99.8, 101.6, and 104.8 ms at an RR interval of 1 s in African females, Caucasian females, African males, and Caucasian males (P<0.001).
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