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When Trabeculations Disrupt Conduction: Left Ventricular Noncompaction Presenting With Symptomatic Bradycardia and
Talha Shamshad1, Ryan Salama2, Jurgen Shtembari1
1Carle Foundation Hospital Urbana Illinois USA.
Clinical Case Reports
|June 8, 2026
Summary
Left ventricular noncompaction (LVNC) should be considered in young patients with unexplained bradycardia, even with unclear echocardiograms. Accurate ECG interpretation is key to differentiate ventricular escape rhythms from AV block, guiding further diagnostic and therapeutic decisions.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Cardiovascular Imaging
Background:
- Unexplained symptomatic bradycardia in young patients can be challenging to diagnose.
- Left ventricular noncompaction (LVNC) is a rare congenital cardiomyopathy.
- Initial echocardiography may be equivocal in diagnosing LVNC.
Purpose of the Study:
- To highlight the importance of considering LVNC in pediatric bradycardia.
- To emphasize the critical role of ECG interpretation in differentiating arrhythmias.
- To guide subsequent diagnostic and therapeutic pathways based on accurate diagnosis.
Main Methods:
- Review of clinical cases with unexplained symptomatic bradycardia.
- Analysis of echocardiographic findings in suspected LVNC.
- Detailed interpretation of electrocardiograms (ECGs) to identify specific rhythm disturbances.
Main Results:
- LVNC should be considered in the differential diagnosis of unexplained bradycardia in pediatrics.
- Distinguishing AV dissociation due to ventricular escape rhythm from true AV block on ECG is crucial.
- Accurate ECG interpretation directly influences the need for cardiac MRI, genetic testing, or device implantation.
Conclusions:
- LVNC is an important consideration in pediatric unexplained bradycardia, especially with equivocal echocardiograms.
- Precise ECG interpretation is essential for appropriate patient management.
- The distinction between ventricular escape rhythm and AV block dictates the next steps in diagnosis and treatment.
Keywords:
AV dissociationbradycardiacardiac MRIcardiomyopathyconduction system diseaseleft ventricular noncompactionMore Related Videos
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