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Assisting in Cardiology and principles of electrocardiography


abnormal sound or murmur heard on auscultation of an organ, vessel, or gland.

chordae tendineae

Tendons that anchor the cusps of the heart valves to the papillary muscles of the myocardium, preventing valvular prolapse.

intermittent claudication

Recurring cramping in the calves caused by poor circulation of the blood to the muscles of the lower legs.

Marfan syndrome

An inherited condition characterized by elongation of the bones, joint hyper mobility, abnormalities of the eyes, and development of aortic aneurysm.


Autoimmune disorder that affect the blood vessel and connective tissue, causing fibrous degeneration of the major organs.


abnormality or irregularity in the heart rhythm.


the two upper chamber of the heart.

atrioventricular (AV) node

Part of the cardiac conduction system located between the atria and the ventricle.


divides from one into two branches.


Heart rate of less than 60 beats per minute.

bundle of His

Specialized muscle fibers that conduct electrical impulses from AV node to ventricular myocardium

cardiac arrest

Condition in which cardiac contractions completely stop.


use of electroshock to convert an abnormal cardiac rhythm to a normal one.


machine used to deliver an electroshock to the heart through electrodes placed on the chest wall.


originating outside of the normal tissue.


area of tissue that has died from the lack of blood supply.


characterized by temporary interruption in the blood supply to a tissue or an organ.


pertaining to the heart muscle.


Heart muscle

sinoatrial (SA) node

pacemaker of the heart, located in the right atrium.


heart rate over 100 beats per minute.


the two lower chambers of the heart.



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