RN Exam 2 Study Guide-Critical Care STUDY REVIEW
Basic Electrophysiology • Automaticity-The ability for the heart muscle to generate it's own electrical activity o Pacemaker Cells arise naturally from the SA Node o Electrolytes involved are K+, Na+, & Ca+ Cardiac Action Potentials • Depolarization-occurs when charge is more (+) o P wave=atrial depolarization o QRS complex=ventricular depolarization o contraction o Systole • Repolarization-recharging period when charge is more (-) o T wave=ventricular repolarization o filling o Diastole • Electrical + Mechanical=Cardiac Contraction
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basic electrophysiology • automaticity the ability for the heart muscle to generate its own electrical activity o pacemaker cells arise naturally from the sa node o electrolytes involved are k
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