Sunao Tawara: discoverer of the atrioventricular conduction system of the heart.
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منابع مشابه
Modulation of extracellular atrioventricular node field potential pattern and ventricular rhythm by morphine in experimental atrial fibrillation in isolated rabbit heart
Introduction: Endorphins are produced by cardiomyocytes, and exert different effects on the heart. The aim of the present study is to assess morphine effects on extracellular atrioventricular (AV) node field potential pattern and ventricular rhythm of isolated rabbit heart during experimental atrial fibrillation (AF). Methods: Effects of different concentrations of morphine (10, 20, 50 and 1...
متن کاملThe rhythmic heart beat is regulated by a precisely timed sequence of pacemaking impulses that propagate through the cardiac conduction system (Tawara, 1906; Goldenberg
The rhythmic heart beat is regulated by a precisely timed sequence of pacemaking impulses that propagate through the cardiac conduction system (Tawara, 1906; Goldenberg and Rothberger, 1936; Bozler, 1942; Fig. 1A). Pacemaking impulses are periodically generated at the sinoatrial node and spread through atrial myocytes initiating contraction of both atrial chambers. The electrical excitation is ...
متن کاملSecond-degree Atrioventricular (Mobitz 1) Heart Block in a 52-hour-old Newborn: A Very Rare Case Report
Background: Cardiac conduction disorders are rare syndromes in neonates and children. According to the literature atrial septal defect, especially ostium secundum type, is associated with atrioventricular (AV) block. Wenckebach conduction heart block is very rare in a neonate; however, there is a dearth of research on the prevalence of this type of heart block regarding the neonates and pediatr...
متن کاملWhy does the heart beat? The discovery of the electrical system of the heart.
Why does the heart beat? This question--known as the myogenic versus neurogenic theory--dominated cardiac research in the 19th century. In 1839, Jan Evangelista Purkinje discovered gelatinous fibers in the ventricular subendocardium that he thought were muscular. Walter Gaskell, in 1886, demonstrated specialized muscle fibers joining the atria and ventricles that caused "block" when cut and fou...
متن کاملThe Discovery of the Electrical System of the Heart
Why does the heart beat? This question—known as the myogenic versus neurogenic theory—dominated cardiac research in the 19th century. In 1839, Jan Evangelista Purkinje discovered gelatinous fibers in the ventricular subendocardium that he thought were muscular. Walter Gaskell, in 1886, demonstrated specialized muscle fibers joining the atria and ventricles that caused “block” when cut and found...
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ورودعنوان ژورنال:
- Cardiology journal
دوره 17 4 شماره
صفحات -
تاریخ انتشار 2010