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don's ekg 12 lead lecture

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Question
Answer
Regular P waves followed by QRS, rate 60 - 100   Sinus Rhythm  
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PR interval > .20 ; represents a slowing of conduction in the AV node   SR with 1st degree heart block  
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PR interval widening with an occasional dropped QRS, usually not symptomatic   SR with 2nd degree heart block type I (wenkebach)  
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PR interval > .20 but constant, usually 3:1 ratio and P wave not always followed by QRS complex   SR with 2nd degree heart block type II (mobitz)  
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P-P constant, QRS constant, P is not followed by QRS in fact there is no correlation between P and QRS, "they do not talk"; usually symptomatic   3rd degreee heart block  
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QRS originates in AV node, QRS 40 -60 bpm, P wave may or may not be present   Junctional Rhythm (seen a lot in anesthesia)  
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no P waves, comes from AV node rate >60 bpm   Accelerated Junctional rhythm  
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Unable to get a PR interval, very irregular complexes, no p waves present   Atrial Fibrillation  
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Saw tooth P waves present; QRS is regular; common 2:1 conduction   Atrial Flutter  
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HR of 140 - 220; does not come from SA node buy the tissues around the AV node   Supraventricular Tachycardia  
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HR 100-220 with wide bizarre QRS; can often lead to ventricular fibrillation   Ventricular tachycardia  
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Failure of primary pacemaker, rate <40 bmp: this is the ventricles last ditch effort for cardiac output, QRS is wide and bizarre   Idioventricular Rhythm  
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Which leads are the precordial leads?   V leads  
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Which leads are the limb leads?   I,II, III  
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Which leads are the augmented leads?   avf, avl, avr  
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Which are the positive leads?   AvF, V3-6  
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Which are the negative leads?   Limb leads, and AvR  
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When lead I is up and avf is down what type of axis deviation is it?   Left shift  
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When lead I is down and avf is up what type of axis deviation is it?   Right shift  
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When lead I is down and avf is down what type of axis deviation is it?   Extreme right shift  
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Bundle Branch Blocks are seen in which leads?   I, V1, V6, and a QRS > .12  
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Right Bundle Branch Blocks are diagnosed how on EKG's   there is a R. S. R1 configuration in V1  
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Left Bundle Branch Blocks are diagnosed how on an EKG   I positive and wide, "bunny ears" seen in V6, but sometimes look like a notch in the QRS in V5  
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Anterior wall is supplied by what artery   LAD, seen best in V1-V4  
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What is the treatment for and anterior wall MI?   Start nitro, stop sx, increase 02, gas off, fentanyl, and watch fluid overload  
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Lateral wall is supplied by which artery   LAD, or obtuse, seen in lead I, avl, V5-V6  
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Inferior wall is supplied by which artery   RCA, seen in leads II, IIIm abd avf  
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how is a inferior wall MI treated   increase fluids, and get ready for dysrhythmias  
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which wall is supplied by PDA and is seen as negative in leads V1 and V2   posterior wall  
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