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ECG interpretation


Generally benign, but may progress to atrial flutter, tachycardia or fibrillation Premature atrial contractions (PAC)
Saw-tooth P waves, indicating valvular disease, acute MI, COPD, and PE Atrial flutter
irregular undulations of ECG without discrete P waves. Occurs in healthy hearts and in patients with CAD, hypertension, and valvular disease A fib
consistent,long PR interval due to medications that suppress AV conduction 1st degree atrioventricular block
progressive prolongation of P-R interval generally benign 2nd degree atrioventricular block (Mobitz1)
consecutive P-R intervals are the same follwed by nondonduction impulses. 2nd degree atrioventricular block (Mobitz2)More serious condition
all impulses are blocked at the AV node. Medical emergency requiring a pacemaker 3rd degree atrioventricular block
common causes include anxiety, caffeine, stress, smoking, and heart disease Premature ventricular complex PVC
P waves are absent and QRS complexes are wide and aberrant in apperance v-tach
ventricles do not beat, quiver asynchronously v-fib
ventricular standstill with no rhythm. straight line ventricular asystole
sign of subendocardial ischemia, can also be due to digitalis toxicity or hypokalemia ST segment depression
earliest sign of acute transmural infarction ST segment elevation
A characteristic marker of infarction Q wave
occurs hours or days after an MI or CVA T wave inversion
Created by: eeshaa