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25 Cards in this Set
- Front
- Back
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P wave
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atrial depolarization
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PR interval
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conduction delay through AV node
normal 0.12 - 0.2 sec (3-5 small boxes) |
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QRS complex
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ventricular depolarization
normal < 120 msec |
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QT interval
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mechanical contraction of ventricals
< 1/2 R-R @ HR < 100 normal QTc < 440 msec |
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T wave
inversion? |
ventricular repolarization
inversion --> recent MI |
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masked w/in QRS
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atrial repolarization
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ST segment
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ventricles depolarIZED
-isoelectric, tracing is flat |
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U wave
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hypokalemia
bradycardia -by definition follows the T-wave |
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ventricular tachycardia
shifting sinusoidal waveforms |
Torsades de pointes
*can progress to V-fib *anything that prolongs QT can predispose to this |
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irregularly irregular baseline
no discrete P waves irregularly spaced QRS complexes |
atrial fibrillation
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atrial fibrillation tx
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beta-blocker
Ca channel blocker Digoxin |
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rapid succession of identical, back-to-back atrial depolarization
"sawtooth appearance" |
atrial flutter
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Tx of atrial flutter
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attempt to convert to sinus rhythm
*class IA *class IC *class III *beta blockers |
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PR interval prolonged (>200 msec)
asmptomatic |
1st degree AV block
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progressive lengthening of PR interval until beat is "dropped" (P wave not followed by QRS)
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2nd degree AV block
Mobitz type I (Wenckebach) |
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dropped beats not preceded by change in length of PR interval
often 2:1 |
2nd degree heart block
Mobitz type II may progress to 3rd degree |
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both P waves & QRS present, but bear no relation to each other
atrial rate faster than ventricular |
3rd degree AV block (complete)
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3rd degree heart block
-tx? -causes? |
3rd degree heart block
-tx? **pacemaker -causes? **lyme dz **(mobitz type II?) |
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completely erratic rhythm
no identifiable waves |
ventricular fibrillation
fatal w/o CPR & defibrillation |
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ECG Strip Graph Paper
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5 big boxes = 1 second
1 big box = 200 msec 1 small box = 40 msec |
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Infarct Location - leads w/Qwaves:
V1-V4 |
Anterior wall (LAD)
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Infarct Location - leads w/Qwaves:
V1-V2 |
Anteroseptal (LAD)
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Infarct Location - leads w/Qwaves:
V4-V6 |
Anterolateral (LCX)
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Infarct Location - leads w/Qwaves:
I, aVL |
Lateral wall (LCX)
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Infarct Location - leads w/Qwaves:
II, III, aVF |
Inferior wall (RCA)
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