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Updated: Jul 7, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
Published on: February 8, 2022
Differences in echocardiographic indices between patients with partial and advanced interatrial conduction delay.
Vignendra Ariyarajah1, Jaxon Fernandes, Sirin Apiyasawat
1Department of Medicine, Division of Cardiology, St Boniface General Hospital/University of Manitoba, Winnipeg, Manitoba, Canada. vignendra@hotmail.com
Advanced interatrial block (IAB) is linked to left atrial abnormality. Two-year follow-up showed left atrial dimension changes in advanced IAB patients, suggesting potential benefits from cardiac imaging.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Imaging
Background:
- Partial interatrial block (IAB) (P wave ≥110 ms) indicates left atrial abnormality.
- The association between advanced IAB and left atrial changes is not well-established.
Purpose of the Study:
- To investigate left atrial changes in patients with advanced IAB compared to partial IAB.
- To assess the potential role of noninvasive cardiac imaging in risk stratification for advanced IAB.
Main Methods:
- Screening of 27 patients for advanced IAB using transthoracic echocardiograms (TTEs).
- A study cohort of 19 patients with repeat TTEs after 2 years.
- Comparison with 44 controls with partial IAB and 2-year follow-up TTEs.
Main Results:
- TTE parameters were similar at baseline but differed on follow-up.
- Left atrial dimension showed a significant change in the advanced IAB group (0.07±0.06 mm) versus the partial IAB group (0.03±0.06 mm; P=.03).
Conclusions:
- Advanced IAB is associated with changes in left atrial dimension over time.
- Further research is needed to determine if advanced IAB patients benefit from regular noninvasive cardiac imaging for risk stratification.
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