Arrhythmias & electrophysiology
Normative Values for QRS Duration in Athletes aged 12-35 years undergoing Pre-participation Exams
Main finding · QRS durationResult — go to the resultMean difference 8.9 ms 95% CI 8.5–9.2Authors' conclusion
Our results indicate that defining prolonged QRS criteria necessitates adjustments according to age and sex. To facilitate future prospective research, we offer specific regression models to detect outliers.
Study context
- Population
- Asymptomatic, apparently healthy athletes ages 12 to 35 undergoing pre-participation examinationsathletes (58% male, age 12–35 years, mean age 18)
- Participants
- 9,084 participants
- Exposure
- Females vs Males
- Outcome
- QRS duration
Main finding
As reported in the abstract
Mean difference
8.9 ms
95% CI 8.5–9.2
By group
Malesvs Females
mean difference 8.9 ms (95% CI 8.5–9.2)
Observational data: associations, not effects.
Further findings
QRS duration >120 ms
| Outcome | Females | Males |
|---|---|---|
| QRS duration percentiles and range | ||
| 97.5th percentile | 106.0 ms | 116.0 ms |
| 99th percentile | 108.0 ms | 118.3 ms |
| Range | 62-130 ms | 70-132 ms |
QRS duration by age and sex
- Positive cross-sectional association with age; greater in men than women
99th percentile quantile regression equations
- Female
- QRS=99.6 + 0.56 x age
- Male
- QRS = 104.7 + 0.74 x age
Original publication
Normative Values for QRS Duration in Athletes aged 12-35 years undergoing Pre-participation Exams. Heart Rhythm. Published 5 November 2026. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →