title: [Effect of anesthesia and/or decapitation on the mechanical behavior of papillary muscles isolated from the left ventricle of the rat].
abstract: The mechanical performance of isometrically contracting papillary muscle was studied in rats sacrificed by decapitation or anesthetized with sodium pentobarbital or chloralose before decapitation. The purpose was to evaluate which maneuver would be the more adequate to ve used, when performance of papillary muscle mechanics must be evaluated later. The data suggest that either anesthetic agents used in this experiment and/or decapitation have the same effects on isolated muscle performance in the three groups. The results may be a consequence of the time elapsed between animal decapitation and the recording of cardiac parameters: this fact would attenuate the many factors that could promote mechanical performance dysfunction or isolated papillary muscles.
authors.forename: A C
authors.initials: AC
authors.lastname: Cicogna
authors.forename: O H
authors.initials: OH
authors.lastname: Bing
mesh_terms: D000704:Analysis of Variance; D000758:Anesthesia; D000818:Animals; D007537:Isometric Contraction; D008297:Male; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D010210:Papillary Muscles / Q000503:physiopathology; D051381:Rats; D013312:Stress, Physiological / Q000503:physiopathology*
vernacular_title: Influência da anestesia e/ou degolamento sobre o comportamento mecânico de músculos papilares isolados de ventrículo esquerdo de ratos.