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You should record whether all the deflections are the same, as some variations may be normal.
You should record whether all the deflections are the same, as some variations may be normal.
Variation in P-wave
Variation in P-wave
May indicate variable conduction
May indicate variable conduction
May indicate electrical alternans
May indicate electrical alternans
No P to every QRS.
No P to every QRS.
If P-P interval is relatively consistent, R-R interval is relatively consistent but P-R interval is highly variable then you have Atrioventricular dissociation
If P-P interval is relatively consistent, R-R interval is relatively consistent but P-R interval is highly variable then you have Atrioventricular dissociation
Where atrioventricular dissociation occurs the origin of the ventricular depolarisation must be within the ventricle or the AV junction
Where atrioventricular dissociation occurs the origin of the ventricular depolarisation must be within the ventricle or the AV junction
Alterations in intervals:
Alterations in intervals:
Drugs
Drugs
Summary:
==Summary==
ECG represents electrical activity recorded at the skin surface as a consequence of depolarisation and repolarisation
ECG represents electrical activity recorded at the skin surface as a consequence of depolarisation and repolarisation
Unique in ability to provide information about cardiac rhythm
Unique in ability to provide information about cardiac rhythm
Normal organised pattern of depolarisation and repolarisation of the heart leads to regular detectable potential differences between points on skin surface
Normal organised pattern of depolarisation and repolarisation of the heart leads to regular detectable potential differences between points on skin surface
*Is there a P for every QRS?
*Is there a QRS for every P?
*Are they all reasonably related?
*Are they all the same?
*Is rhythm regular or irregular?
*Is the arrhythmia regularly irregular or irregularly irregular?
[[Category:Monitoring Anaesthesia]]
[[Category:Monitoring Anaesthesia]]
[[Category: To Do - Siobhan Brade]]
[[Category: To Do - Siobhan Brade]]