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Is there a ECG marker for recent syncope ?

Yes . This was classically described many  decades ago. Following a Stokes -Adam attack  when the patient recovers from the loss of consciousness a peculiar ECG pattern was observed.

A typical ECG from our CCU

The mechanism is not clear.It can be due to

1. Repolarisation abnormalities due to ischemia.

2.Acute adenergic surge triggered  due to  transient   cessation of circulation* .

3.CNS  injury  and extreme  vagal with drawl

4.Hypokalemia

* Thought to be the major mechanism

Out come

The ECG is more dramatic .The physician is usually more tense than the patient !

It  is often  benign .Prompt pace maker implantation is required.

Reference

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