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Boards 2e

B2 Electrocardiography

Atrial depolarization P wave
Ventricular depolarization QRS complex
Ventricular repolarization T wave
identify age of infarct ST -T
Early MI (or hyperacute) elevated ST - T
Hallmark of MI Q Wave
Chronic MI/days to weeks Wider Deeper Q wave
Acute/hours post MI elevated S-T
Sub-acute/hours to days post MI elevated S-T, inverted T
Weeks to months post MI Q still wide and deep
P:QRS 1:1 HR 140-250 Paroxysmal Tachycardia
Many ill-defined P-waves Atrial fibrillation
May result in CVA Atrial fibrillation
Saw-tooth" waves Atrial flutter
rapid uncoordinated ventricular contraction Ventricular Fibrillation
Created by: dc2bx2