title: Modern technique for following up changes in the mechanical and electric parameters of the heart.
abstract: The perfected experimental model described was developed for study of the action of various drugs on the isolated frog heart, recording concomitantly variations in the volume of the heart in the course of the cardiac cycle, the electrocardiogram and cardiac output. A description is given of the original components of the apparatus developed by the authors, as well as the normal values of the parameters studied.
mesh_terms: D000818:Animals; D002302:Cardiac Output; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006334:Heart Function Tests; D010991:Plethysmography; D011898:Ranidae