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the heart - ekg book
the heart - ekg book - med surg
Question | Answer |
---|---|
the zipper | common phrase that refers to the vertical thick red line scar that runs down the center of a patient's chest after open-heart surgery. |
circulatory systems at work in the heart | right side of heart - blood from body. left side of heart - blood from lungs coronary arteries - oxygenated blood to heart itself |
in coronary artery disease, the arteries that provide heart w/ oxygen become... | narrowed/blocked |
three stage process of damage to teh heart cells when there is a lack of oxygen to the myocardium | ischemia, injury and infarct |
cardiac cycle phases | contraction and relaxation |
depolarization of the heart muscle | contraction |
repolarization of the heart muscle | relaxation |
at rest the heart is ____ charged on the inside and ___ charged on the outside | negatively inside and positively charged outside |
What is an ECG? | measurement of electrical activity. positive and negative charges are what the monitor records. |
phases of repolarization | relative refractory (heart susceptible to strong stimulation). absolute refractory (heart cannot receive any stimulation no matter how strong). |