ecg interpretation
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markmeded.blogspot.co.uk Undergraduate ECG interpretation Share with everyoneTRANSCRIPT
ECGs
Mark Hall
Clinical Teaching Fellow
Normal ECG
P-Q-R-S-T Complex
Atrial rate = 300 / P-P interval (large squares)Ventricular rate = 300 / R-R interval
Paper rate = 25 mm/sec (Five large squares) Note – may be increased to 50 mm/sec.
Axis Deviation
LV Hypertrophy
Count the small squares in the V lead with max S wave
Count the small squares in the V lead with the max R wave
If the sum is >35 - LVH
Patterns of Ischaemia
Anterior Inferior Lateral Septal Posterior
V1 – V4
II, III, aVF
I, aVL, V5, V6
V3,V4
Mirror image of acute injury in leads V1 - 3 Tall R wave, tall upright T wave in leads V1 -3 usually associated with inferior and/or lateral STEMI
Arrythmias
Narrow QRS Broad QRS
Regular
Supra Ventricular Tachycardia (SVT)
Usually can’t see P wave
Rate >150
Ventricular Tachycardia
(VT)
IrregularAtrial Fibrillation (AF)
No P wave – wavy baselineVentricular
Fibrillation (VF)
Bundle Branch Block
MaRRow RIGHT Bundle Branch Block WiLLiaM LEFT Bundle Branch Block
Bundle Branch Block
Random Assortment
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