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[Effect of streptomycin on stretch-induced change in myocardial activation during ventricular fibrillation]

Isabel Trapero1, Francisco J Chorro, Luis Such-Miquel

  • 1Departamento de Enfermería, Universitat de València, Valencia, España.

Revista Espanola De Cardiologia
|March 28, 2008
PubMed

Insights

Streptomycin, a compound blocking stretch-sensitive receptors, counteracted changes in myocardial activation during ventricular fibrillation. This finding suggests a potential therapeutic target for managing arrhythmias.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Pharmacology

Context:

  • Ventricular fibrillation (VF) presents challenges in myocardial activation patterns.
  • Acute stretching of the ventricular wall can alter electrophysiological properties during VF.
  • Understanding interventions to modulate these changes is crucial for cardiac health.

Purpose:

  • To investigate if streptomycin can counteract stretch-induced changes in myocardial activation during VF.
  • To assess the direct effects of streptomycin on refractoriness and activation frequency in VF.

Summary:

  • This study utilized 16 isolated rabbit hearts to measure electrophysiological parameters during ventricular fibrillation (VF) and acute left ventricular wall stretching.
  • Hearts were divided into two groups: one without streptomycin (Series A) and one with streptomycin perfusion (Series B).
  • Streptomycin significantly attenuated the increase in dominant frequency and altered refractoriness caused by stretching during VF, indicating a counteracting effect.

Impact:

  • The findings suggest that streptomycin may mitigate adverse electrophysiological effects of mechanical stress on the heart during VF.
  • This research highlights the role of stretch-sensitive receptors in cardiac electrophysiology during fibrillation.
  • Potential implications for developing novel therapeutic strategies targeting mechanosensitive pathways in arrhythmias.

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