From the Research
The crista supraventricularis pattern is defined as QRS ≤ 100 ms, S wave < 40 ms in I or V6 together with an RSR´ pattern in lead-V1, and its prevalence in young athletes is approximately 13.3%. This pattern is important in cardiac anatomy as it helps direct blood flow from the tricuspid valve toward the pulmonary valve during ventricular contraction. The crista supraventricularis, a muscular ridge, separates the inflow and outflow portions of the right ventricle, and abnormalities in its formation can lead to congenital heart defects 1.
Key Features of the Crista Supraventricularis Pattern
- QRS duration of 100 ms or less
- S wave duration of less than 40 ms in leads I or V6
- RSR´ pattern in lead V1
- Prevalence of approximately 13.3% in young athletes, as found in a study of 6,401 children attending a pre-participation screening program 1
Clinical Significance
The crista supraventricularis pattern is relevant when evaluating certain congenital heart conditions, and understanding this pattern is essential for cardiologists and cardiac surgeons when assessing right ventricular function and planning interventions for congenital heart defects affecting right ventricular outflow. However, the most recent and highest quality study on this topic, published in 2020, provides the most accurate definition and prevalence of the crista supraventricularis pattern 1.
Diagnosis and Visualization
The pattern can be visualized during echocardiography or cardiac MRI, and its diagnosis is crucial in differentiating it from other conditions, such as incomplete right bundle branch block (IRBBB) 1. A study published in 2020 found that the proportion of athletes showing an S1S2S3 pattern was higher in those with the crista supraventricularis pattern compared to other QRS morphologies, highlighting the importance of accurate diagnosis 1.