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Hypertrophic obstructive cardiomyopathy: hemodynamic improvement with intravenous verapamil

S J Roth1, C B Porter, L A Latson

  • 1The Lillie Frank Abercrombie Section of Cardiology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA.

Texas Heart Institute Journal
|June 1, 1983
PubMed

Insights

Intravenous verapamil effectively reduced left ventricular outflow tract gradients in two pediatric patients with hypertrophic obstructive cardiomyopathy when beta blockers were contraindicated. This suggests verapamil as a potential treatment for selected cases.

Area of Science:

  • Cardiology
  • Pediatric Medicine
  • Pharmacology

Background:

  • Hypertrophic obstructive cardiomyopathy (HOCM) presents a significant challenge in pediatric patients.
  • Traditional therapies like beta-adrenergic antagonists may be contraindicated or ineffective.
  • Managing left ventricular outflow tract (LVOT) gradient is crucial for patient outcomes.

Purpose of the Study:

  • To evaluate the efficacy of intravenous verapamil in reducing LVOT gradient in pediatric HOCM.
  • To explore verapamil as an alternative treatment when standard therapies are not suitable.

Main Methods:

  • Case study of two pediatric patients with HOCM.
  • Intravenous administration of verapamil.
  • Measurement of LVOT gradient before and during verapamil infusion.

Main Results:

  • In a 15-year-old patient, the LVOT gradient decreased from 160 to 45 torr.
  • In a 3-year-old boy, the LVOT gradient reduced from 60 to 10 torr.
  • Significant reduction in LVOT gradient observed in both pediatric cases.

Conclusions:

  • Intravenous verapamil demonstrated effectiveness in reducing LVOT gradients in pediatric HOCM patients.
  • Verapamil may serve as a viable therapeutic option for selected pediatric HOCM cases, especially when other treatments are contraindicated.

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