
An atrioventricular block (or AV block) involves the impairment of the conduction between the atria and ventricles of the heart. Under normal conditions, SA node in the atria sets the pace for the heart, and these impulses travel down to the ventricles. In an AV block, this message does not reach the ventricles or is impaired along the way. The ve...
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http://en.wikipedia.org/wiki/Atrioventricular_block

<cardiology> A conduction disturbance that results in the inappropriate delay (or complete inability) of a electrical impulse, generated in the atria, to reach the ventricles (via the atrioventricular node). ... Clinical types are divided into first (nonserious), second and third degree (most serious). ... Some drugs may precipitate atriovent...
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http://www.encyclo.co.uk/local/20973

any interruption of the conduction of electrical impulses from the atria to the ventricles; it can occur at the level of the atria, the atrioventricular node, the bundle of His, or the Purkinje system. See also heart block. a type of heart block in which the blocking is at the atrioventricular junction. It is call...
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Definitions: 1. partial or complete block of electrical impulses originating in the atrium or sinus node, preventing them from reaching the AV node and ventricles. In first-degree AV block, there is prolongation of AV conduction time (PR interval); in second-degree AV block, some but not all atrial impulses fail to reach the ventricles, ...
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http://www.medilexicon.com/medicaldictionary.php?t=10751

an interruption of the electrical signal between the atria and the ventricles.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---cardiovasc

An interruption or disturbance of the electrical signal between the hearts upper two chambers (the atria) and lower two chambers (the ventricles).
Found on
https://www.texasheart.org/heart-health/heart-information-center/topics/a-z
No exact match found.