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Disease Conduction

MEDOP 230- Cardiology: Diseases of the conduction system

TermDefinitionNote
Arrhythmia Any type of irregular rate or rhythm of the heart.
Bradycardia Arrhythmia in which the heart beats too slowly.
Fibrillation Arrhythmia in which there is very fast, uncoordinated quivering of the myocardium.
Flutter Arrhythmia that involves a very fast but regular rhythm of the atria or ventricles (up to 250 beats/min)
Heart block Arrhythmia in which impulses from the SA node do not travel normally to the Purkinje fibers.
Premature contraction. Arrhythmia in which there are one or more extra contractions of either the atria or the ventricles •Bigeminy = one premature contraction followed by one normal contraction •Trigeminy = one premature contraction followed by two normal contractions •Couplet = two premature contractions
Sick sinus syndrome Arrhythmia in which bradycardia alternates with tachycardia; occurs when the SA node and an ectopic site compete to be the heart’s pacemaker.
Tachycardia Arrhythmia in which there is a fast but regular rhythm (up to 200 beats/min)
Asystole Complete absence of a heartbeat; also known as cardiac arrest.
Palpitation An uncomfortable sensation like a “thump” inside the chest due to premature contraction of the heart.
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