Arm lead reversal vs Dextrocardia in ecg

Reversal of arm leads is the commonest error when recording an ecg/ekg.

Negative P in lead 1 is an useful diagnostic clue.

Chest leads show normal transition with tall R in lead reversal , whereas in true mirror-image dextrocardia the QRS complex becomes smaller and displays mostly QS or rS in v4-v6.

Also as we know lead 1 v5 v6 show same polarity a they are all lateral leads.If lead 1 qrs predominantly negative while v5,6 is positive, suspect reversal.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: