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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 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 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 ...
Second-degree atrioventricular block (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles. The presence of second-degree AV block is diagnosed when one or more (but not all) of the atrial impulses fail to conduct to the ventricles due to impaired conduction.
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]
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]
The current quiz mistress is Dr. Elsie Effah Kaufmann. Presently, every contest is composed of five rounds with the following rules: Round 1 — The round of fundamental questions. Each contesting school has to answer 4 Biology, 4 Chemistry, 4 Physics and 4 Mathematics questions. A wrongly answered question may be carried over as a bonus.
The degree is awarded predominantly in the natural sciences, mathematics, computer science, economics, as well as in the arts and other disciplines. Those who graduate from an engineering program prior to being awarded a master's degree are allowed to use the "mgr inż." pre-nominal ("master engineer").