Kaiser EKG Test| 100% Correct Answers
Kaiser EKG Test| 100% Correct Answers depolarization - inside of cell becomes positive, outside negative - contraction - na+ channel opens - ELECTRICAL repolarization movement of cells = inside is negative again - na+ channels close, k+ channels open - MECHANICAL p wave qrs wave t wave - (p) atrial depolarization - (qrs) ventricular depolarization - (t) ventricular repolarization refractory period per of time where cardiac cells cannot respond to stimulus absolute refractory period beginning of qrs to peak of t wave relative refractory (vulnerable per of repolarization) - cardiac cells have repolarized enough to respond to strong stimulus - during this per a strong stimulus may overtake the pacemaker of the heart - ex. PVC during vulnerable period may turn into vtach or torsades - prolonged QT interval inc possibility causes of prolonged qt intervals haldol, bradycardia, hypokalemia automaticity ability of pacemaker cells to initiate electrical impulse excitability ability of muscle cells to respond to outside stimulus conductivity
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