Project · Q3
Q.Evaluation of ECG on broad basis.
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Start your 14-day free trial to unlock the full solution →Evaluate an ECG step by step - rate, rhythm, P, P-R, QRS, S-T, T - comparing each with the normal trace in Fig. 8.26.
Suggested plan.
- Rate - count the time between two R peaks; at 0.8 s per cycle the rate is 75 per minute. Above 100 is tachycardia, below 60 bradycardia.
- Rhythm - are the R-R intervals equal? An irregular spacing suggests an arrhythmia.
- P wave - a small upright wave before every QRS shows normal atrial depolarisation from the SA node.
- P-R interval - about 0.16 s; a longer interval means the impulse is delayed at the AV node.
- QRS complex - sharp and narrow; a wide complex means slow conduction through the ventricles. …
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