NUR 209 Lecture Notes - Lecture 25: Coronary Artery Disease, Sinoatrial Node, Purkinje Fibers
Document Summary
Sinus node dysrhythmias: sinus bradycardia, sinus tachycardia, sinus arrhythmia. Atrial dysrhythmias: premature atrial contractions (pac, atrial flutter, atrial fibrillation. Normal electrical conduction: sa node (sinus node, av node, bundle of his, right and left bundle branches, purkinje fibers. Electrical conduction: depolarization = electrical stimulation = systole, repolarization = electrical relaxation = diastole. Dysrhythmias: disorders of formation or conduction (or both) of electrical impulses within heart, can cause disturbances of, rate, rhythm, both rate and rhythm. 9/2/20: rhythm, both rate and rhythm, potentially can alter blood flow and cause hemodynamic changes, diagnosed by analysis of electrographic waveform. Relationships: electrical impulse, ecg complex, lead system(view, i, ii, iii. Ecg graph paper (time: baby box, 0. 04 second, five baby boxes in one big box, big box, 0. 2 second, 5 big boxes, 1 second. Ecg graph paper (amplitude: baby box, 1 mm voltage, five baby boxes in one big box, big box, 5 mm voltage.
