how to determine the axis on ekg

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tripta j

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how exactly should one determine the axis? if lead I and AVF are not positive is that when you need additional leads?
 

phillydoc

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Rule of thumb

Look at lead I and Lead aVF

if qrs complex is reaching each other it is right axis( RAD) R- reaching

? lead I
? aVF

if qrs is leaving each other it is left axis deviation (LAD)- L- leaving

?Lead I
? aVF
 
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