This document outlines an approach for interpreting electrocardiograms (ECGs). It discusses justifying ECG use based on symptoms or exam findings. A structured approach is presented: check quality, rate, rhythm, axis, P wave, PR interval, QRS duration/morphology, ST segment, T wave, QT interval. Abnormal findings are defined, such as ST depression indicating ischemia. The goal is to develop skills in systematic ECG interpretation and identifying common abnormalities.
6. Why perform an ECG?ï Itâs part of the admission bundle
ï Indicated by the patientâs symptoms
ï - symptoms of IHD/MI
ï - symptoms associated with dysrhythmias
ï Indicated by the patientâs examination findings
ï - cardiac murmur
7. ECG interpretationQuality of ECG?
Rate
Rhythm
Axis
P wave
PR interval
QRS duration
QRS morphology
Abnormal Q waves
ST segment
T wave
QT interval
8. Quality of the ECG
ï Patient name
ï Date of the ECG
ï Is there any interference?
ï Is there electrical activity from all 12
leads?
ï Calibration:
ï - speed = 25mm/second
ï - height = 1cm/mV
23. PR intervalï Start of P wave to start of QRS complex
ï Normal = 0.12 - 0.2 seconds (3-5 small squares)
ï Decreased = can indicate an accessory pathway
ï Increased = indicates AV block (1st
/2nd
/3rd
)
24. ECG interpretationQuality of ECG?
Rate
Rhythm
Axis
P wave
PR interval
QRS duration
QRS morphology
Abnormal Q waves
ST segment
T wave
QT interval