Qrs complex ventricle t wave ventricle repolarization

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QRS complex- ventricle depolarization(contraction) T wave- ventricle repolarization (resting) NSR regular rhythm(60-100) each QRS complex is preceded by a normal P wave PR interval remains reg. and constant How do you calculate HR from an ECG? Count out 30 boxes, count the R waves within those boxes, multiply by 10! Sinus bradycardia Less than 50bpm regular, but slow rhythm Sinus tachycardia Normal rhythm Rate >100 Regular irregular- The rhythm is regular, but there is no pattern to it Irregularly irregular- The rhythm is irregular and there is no pattern to it QRS complex normal, narrow, broad? A-fib absence of P waves w/ an irregular QRS complex atria is firing rapidly and randomly. AV node gets overwhelmed and only lets some impulses through no pattern
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3 Supraventricular tachycardia(SVT) absence of P waves w/ a narrow QRS complex tachycardia P or T waves? Indistinguishable has a pattern A-flutter Saw tooth pattern predictable HR 50,100,75 bpm P waves are very hard to identify Heart Blocks 1 st degree block Pr interval is regular but long 0.12-0.2 sec or longer than 3-5sq. AV node holds onto impulses a little too long 2 nd degree block Mobitz I: Wenckebach “Longer,longer,longer, drop then you have a wenckebach” Mobitz II: dropped QRS complex w/ an otherwise regular PR interval may be missing some P waves “If some P's don't get through, then you have a mobitz II” 3 rd degree block: “divorced” More P waves than QRS complexes w/ no relationship between the two.
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  • Fall '17
  • Cardiology, electrical impulses, Cardiac electrophysiology, QRS complex, Electrocardiography

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