title: [Effect of streptomycin on stretch-induced change in myocardial activation during ventricular fibrillation].
abstract: The aim of this study was to determine whether the changes in myocardial activation pattern resulting from acute stretching during ventricular fibrillation can be counteracted by administering a compound that blocks receptors sensitive to stretch. The study involved 16 isolated rabbit hearts, in which refractoriness and activation frequency during ventricular fibrillation were measured before, during and after localized acute stretching of the left ventricular free wall, either without (series A, n=8) or with (series B, n=8) the presence of streptomycin, 200 micromol. At baseline and during and after stretching, ventricular fibrillation was slower with streptomycin perfusion in series B than in series A (dominant frequency at baseline, 13+/-2 Hz vs. 16+/-2 Hz, respectively; P< .005; dominant frequency with stretching, 14+/-2 Hz vs. 19+/-3 Hz, respectively; P< .005). Streptomycin attenuated the electrophysiological changes produced by stretching and had a direct effect on refractoriness and activation frequency during ventricular fibrillation.
authors: Departamento de Enfermería, Universitat de València, Valencia, España.
authors: Isabel
authors: I
authors: Trapero
authors: Francisco J
authors: FJ
authors: Chorro
authors: Luis
authors: L
authors: Such-Miquel
authors: Joaquín
authors: J
authors: Cánoves
authors: Alvaro
authors: A
authors: Tormos
authors: Francisca
authors: F
authors: Pelechano
authors: Laura
authors: L
authors: López
authors: Luis
authors: L
authors: Such
mesh_terms: D000818:Animals; D006321:Heart / Q000187:drug effects* / Q000503:physiopathology*; D006801:Humans; D066298:In Vitro Techniques; D011817:Rabbits; D013307:Streptomycin / Q000494:pharmacology*; D014693:Ventricular Fibrillation / Q000188:drug therapy* / Q000503:physiopathology*
chemical_list: D013307:Streptomycin