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EKGs
Downstate > MS2 CV Block > EKGs
21
Medical
Graduate
01/15/2011

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Cards

Term
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Definition
1st degree AV block: PR interval > 200ms
Term
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Definition
accelerated idioventricular rhythm: rates of 50-100bpm, automaticity mechanism, associated with reperfusion after MI
Term
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Definition
atrial fibrillation: "irregularly irregular"; no P wave, normal QRS
Term
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Definition
atrial flutter (3:1 AV block): "sawtooth"; 250-350bpm; many P waves, normal QRS
Term
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Definition
atrial premature depolarization: aberrant P wave, normal QRS
Term
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Definition
complete heart block = 3rd degree block: atrial rate > ventricular rate; do NOT give atropine
(vs. AV dissociation: atrial rate < ventricular rate; tx: atropine)
Term
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Definition
sinus rhythm: normal; 60-100bpm, PR 120-200msec; QRS 100msec; QT 400msec
Term
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Definition
sinus bradycardia: <60bpm
Term
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Definition
sinus tachycardia: >100bpm
Term
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Definition
supraventricular tachycardia: caused by premature atrial beats; no P waves; AV node-dependent
Term
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Definition
trigeminy premature ventricular depolarization: widened QRS, inverted T wave
Term
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Definition
ventricular fibrillation: chaos! 100% mortality!
Term
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Definition
monomorphic ventricular tachycardia: wide QRS, no P waves
Term
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Definition
2nd degree AV block Mobitz type I (Wenckebach): progressively prolonged PR interval until dropped QRS; seen in digitalis toxicity
Term
normal PR interval
Definition
120-200msec
Term
normal QRS duration
Definition
100msec
Term
normal QT interval
Definition
400msec
Term
which arrhythmia is caused by automaticity only?
Definition
accelerated idioventricular rhythm
Term
which arrhythmia is associated with reperfusion after MI
Definition
accelerated idioventricular rhythm
Term
atrial depolarization is faster than ventricular depolarization
Definition
3rd degree block
Term
atrial depolarization is slower than ventricular depolarization
Definition
AV dissociation
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