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Murine Fetal Echocardiography
08:04

Murine Fetal Echocardiography

Published on: February 15, 2013

M-shaped doppler signal across ventricular septal defect: potential implications for estimation of right ventricuilar

J C Mohan1, L R Nath

  • 1Department of Interventional Cardiology, Metro Golden Heart Institute, New Delhi. jcmohan@vsnl.com

Indian Heart Journal
|July 15, 2005
PubMed

Insights

A child with ventricular septal defect and pulmonary stenosis showed a large echo-Doppler gradient but a small catheterization gradient. This discrepancy highlights potential measurement differences in pediatric cardiology.

Area of Science:

  • Pediatric Cardiology
  • Echocardiography
  • Cardiac Physiology

Background:

  • Evaluation of congenital heart defects like ventricular septal defect (VSD) and pulmonary stenosis (PS) is crucial in pediatric patients.
  • Accurate hemodynamic assessment is vital for guiding treatment strategies.

Observation:

  • An 8-year-old child presented with VSD and severe valvular PS.
  • Echocardiography revealed a significant transventricular systolic gradient of 64 mmHg across the VSD, characterized by an M-shaped spectral pattern.
  • Cardiac catheterization subsequently measured a peak-to-peak non-simultaneous gradient of only 14 mmHg between the ventricles.

Findings:

  • A substantial discrepancy exists between echocardiography-derived and cardiac catheterization-derived pressure gradients in this pediatric case.
  • The M-shaped spectral pattern on echo-Doppler warrants further investigation regarding its specific hemodynamic significance.

Implications:

  • This case underscores the importance of correlating findings from non-invasive (echo-Doppler) and invasive (cardiac catheterization) methods.
  • Understanding such gradient discrepancies can refine diagnostic accuracy and therapeutic decision-making in complex pediatric congenital heart disease.
  • Further research may elucidate the factors contributing to these measurement variations.

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