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pugsrule915
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electrocardiography
process of recording electrical activity generated by the heart
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electrocardiogram
- record of electrical activity generated by the heart
- used to evaluate abnormal cardiac rhythm
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sinus rhythm
- normal heart rhythm
- shows 5 waves on the ECG strip, which represent electrical changes as they spread through the heart
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P wave
represents atrial depolarization, conduction of an electrical impulse through the atria causing atrial contraction
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QRS waves/ complex
ventricular depolarization, conduction of electrical impulses through the ventricle though the bundle of His and Purkinje fibers causing ventricular contraction
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T wave
electrical recovery and relaxation of the ventricles (during diastole)
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microcardia
abnormal smallness of the heart (underdeveloped)
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megalocardia/ cardiomegaly
enlargement of the heart
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angina pectoris
paroxysmal pain in the chest, often radiating to the arms, particularly the left, usually due to interference with the supply of oxygen to the heart muscle
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lumen
the inner open space or cavity of a tubular organ, as of a blood vessel.
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arteriosclerosis
- abnormal condition of arterial hardening
- thickening, hardening, and loss of elasticity of the atrial walls which results in decreased blood supply
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atherosclerosis
- abnormal condition of fatty plaque hardening
- most common form or arteriosclerosis
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