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Sunday, April 1, 2012

significance of the Q wave

Q wave is the first downward deflection after P wave. it simply denotes the absence of electrical impulse which usually caused by an MI. It takes a few hours to days for it to develop, hence it is one of the ways to determine the occurence of MI.

Q Wave can persistently be there unless reperfusion takes place early. Therefore, persistent Q wave indicates presence of previous MI.

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