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[Vectorcardiographic features of right ventricular dilatation]
I Ruttkay-Nedecký1, E Vanzurová, K Kanáliková
1Ustav normálnej a patologickej fyziológie SAV, Bratislava, CSFR.
Bratislavske Lekarske Listy
|June 1, 1992
Summary
Vectorcardiograms revealed specific QRS loop changes indicating right ventricular dilatation in atrial septal defect patients. Surgical repair normalized these vectorcardiographic signs, confirming effective hemodynamic improvement.
Area of Science:
- Cardiology
- Medical Imaging
- Pediatric Cardiology
Context:
- Atrial septal defect (ASD) is a common congenital heart condition.
- Right ventricular dilatation is a frequent consequence of uncorrected ASD.
- Vectorcardiography (VCG) offers insights into cardiac electrical activity and chamber dimensions.
Purpose:
- To identify specific vectorcardiographic (VCG) signs indicative of right ventricular dilatation in patients with atrial septal defect (ASD).
- To evaluate the impact of surgical ASD repair on these VCG abnormalities.
- To correlate VCG findings with hemodynamic normalization post-intervention.
Summary:
- Axial McFee-Parungao lead system vectorcardiograms were analyzed in 55 patients (aged 3-24 years) with type ASD before and 3 years after surgical repair.
- Key VCG findings for right ventricular dilatation included rightward shifts in horizontal plane vectors (50-70 ms), decreased vector magnitude (around 40 ms), and abnormal spatial loop departures.
- Post-surgical repair, these abnormalities resolved, correlating with normalized hemodynamics, indicating successful intervention.
Impact:
- Establishes distinct VCG criteria for diagnosing right ventricular dilatation in ASD.
- Demonstrates the efficacy of surgical ASD repair in reversing cardiac structural and electrical changes.
- Highlights VCG as a valuable tool for monitoring post-operative recovery and hemodynamic status in pediatric cardiology.