The activation of the free left ventricular wall in the dog's heart
1955; Elsevier BV; Volume: 49; Issue: 4 Linguagem: Inglês
10.1016/0002-8703(55)90077-6
ISSN1097-6744
AutoresDemetrio Sodi‐Pallares, A Bisteni, Gustavo A. Medrano, Fernando Cisneros,
Tópico(s)Cardiomyopathy and Myosin Studies
ResumoIn this study a critical attempt was made to review some of the more recent experimental studies on ventricular activation. A study of the activation of the normal free ventricular wall using the cathode-ray tube confirmed our previous observations. The spread of activation in the subendocardial muscle mass and at least one-half of the thickness of the adjacent free ventricular wall, reaches values of 2,000 or more mm. per sec. In these regions QS complexes are recorded as described by Prinzmetal and collaborators. An attempt to explain this morphology is presented. In left bundle branch block the sequence, sense, and speed of activation in the free left ventricular wall are unchanged as compared to the normal control. The alterations in morphology are mainly due to changes in direction of activation and delay of conduction in the interventricular septum.
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