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989751
ECG!
Description
Mind Map on ECG!, created by bessimajamal on 09/06/2014.
Mind Map by
bessimajamal
, updated more than 1 year ago
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Created by
bessimajamal
almost 10 years ago
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Resource summary
ECG!
P wave- atrial depolarisation
PR interval - (0.12-0.20s, 3-5 squares)
QRS complex- Ventricular depolarisation
ST segment - pause in ventricular activity
T wave- ventricular repolarisation
Heart Block (PR interval >0.20s)
1st degree: PR delay is constant, and all P waves followed by QRS complex
2nd degree
Mobitz type 1: PR progressively longer till one P wave not conducted and no QRS, then reset
Mobitz Type 2: PR interval fixed and normal, occasional P wave no QRS
2:1 block - every alternate P wave no QRS
3rd degree: Atrial P waves have no relation to QRS complex (P waves abnormal/absent, bradycardia, broad QRS)
Atrial flutter: Atrial rate 300/min, ventricular rate 150, sawtooth baseline, AV block (2:1, 3:1, 4:1)
AF: irregularly irregular rhythm, no P waves, QRS rate 170/min
Ventricular tachy: Broad QRS, ventricular rate >120, may degenerate into VF
Re-entrant tachy: Verticular rate 188, narrow RS complex, P waves halfway between QRS complexes
VF: chaotic rhythm, broad QRS , rate >190
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