Evidence for chaotic behavior in driven ventricles

• Published in: Biophysical journal Vol. 56; no. 2; pp. 273 - 280
• Main Authors: Savino, G.V., Romanelli, L., González, D.L., Piro, O., Valentinuzzi, M.E.
• Format: Journal Article
• Language: English
• Published: Bethesda, MD Elsevier Inc 01.08.1989; Biophysical Society
• Subjects: Animals; Biological and medical sciences; Bufo arenarum; Electric Stimulation; Electrocardiography; Fundamental and applied biological sciences. Psychology; Heart; Heart - physiology; In Vitro Techniques; Time Factors; Ventricular Function; Vertebrates: cardiovascular system; Heart; Vertebrata; Amphibia; Electrocardiography; Electrophysiology; Toad; Action potential; Heart ventricle; Salientia; Circulatory system

Toad ventricles were externally driven by periodic pulses while monophasic action potential (MAP) signals were recorded in seven excised and seven in situ ventricles. As the frequency was slowly increased in steps, the stimulated tissue displayed several dynamic characteristics. Hierarchies of perio...