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The conduction system consists of specialized heart muscle cells, situated within the myocardium. [3] There is a skeleton of fibrous tissue that surrounds the conduction system which can be seen on an ECG. Dysfunction of the conduction system can cause irregular heart rhythms including rhythms that are too fast or too slow.
The bundle of His (BH) [1]: 58 or His bundle (HB) [1]: 232 (/ h ɪ s / "hiss" [2]) is a collection of heart muscle cells specialized for electrical conduction.As part of the electrical conduction system of the heart, it transmits the electrical impulses from the atrioventricular node (located between the atria and the ventricles) to the point of the apex of the fascicular branches via the ...
The Tamil Nadu Dr. M.G.R. Medical University (abbr. TNMGRMU) is a government medical university situated in Guindy in the southern part of the city of Chennai, Tamil Nadu, India. It is about 7 km from the Chennai International Airport and about 13 km from the Chennai Central Railway Station .
The bundle branches were separately described by Retzer and Braeunig as early as 1904, but their physiological function remained unclear and their role in the electrical conduction system of the heart remained unknown until Sunao Tawara published his monograph on Das Reizleitungssystem des Säugetierherzens (English: The Conduction System of the Mammalian Heart) in 1906. [4]
Dr. M. G. R. Home and Higher Secondary School for the Speech and Hearing Impaired is a school established on 17 January 1990 [1] in Kanchipuram, Tamil Nadu, India. About [ edit ]
Purkinje fibers also have the ability of firing at a rate of 20–40 beats per minute if upstream conduction or pacemaking ability is compromised. [9] In contrast, the SA node in normal state can fire at 60-100 beats per minute. [9] In short, they generate action potentials, but at a slower rate than the sinoatrial node. [9]
A dromotropic agent is one which affects the conduction speed (in fact the magnitude of delay [1]) in the AV node, and subsequently the rate of electrical impulses in the heart. [2] [3] Positive dromotropy increases conduction velocity (e.g. epinephrine stimulation), negative dromotropy decreases velocity (e.g. vagal stimulation). [4]
The college offers a 5.5-year Bachelor of Medicine, Bachelor of Surgery (MBBS) degree, as well as a diploma in Nursing (GNM) and a diploma in Medical Lab Technology (DMLT), 4 year Bachelor of Science (B.Sc Paramedical) in Renal Dialysis technology (From 2018 onwards).In the year 2018 -2019 [2] post-graduate courses have started.