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kinn's Chapter 49

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
atria   The two upper chambers of the heart.  
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atrioventricular (AV) node   The part of the cardiac conduction system between the atria and the ventricles.  
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bundle of His   Specialized muscle fibers that conduct electrical impulses from the AV node to the ventricular myocardium.  
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cardiac arrest   A condition in which cardiac contractions stop completely.  
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cardioversion   The use of electroshock to convert an abnormal cardiac rhythm to a normal one.  
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defibrillator   A machine that delivers an electroshock to the heart through electrodes placed on the chest wall.  
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ectopic   Originating outside of the normal tissue.  
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infarction   An area of tissue that has died from lack of blood supply.  
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ischemia   Decreased blood flow to a body part or organ, caused by constriction or blockage of the supplying artery.  
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myocardial   Pertaining to the heart muscle.  
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sinoatrial (SA) node   The pacemaker of the heart; it is located in the right atrium.  
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ventricles   The two lower chambers of the heart.  
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