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All ECG 24

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Source: Learn the Heart

The ECG shows coarse fibrillatory waves, but an isoelectric baseline is evident in the rhythm strips. The QRS complexes are irregularly irregular. The arrhythmia is atrial fibrillation with an uncontrolled ventricular response.

The ECG findings of dextrocardia include a predominantly negative P wave (when sinus rhythm is present), negative QRS complex and negative T wave in lead I. This results in a rightward QRS axis. There will also be low voltage in leads V3-V6 since the heart is on the right side and the chest leads are placed on the left side. The ECG with dextrocardia can appear similar to limb lead reversal in lead I; however, if the limb leads are simply misplaced, leads V3-V6 will appear normal and not low in voltage as seen in dextrocardia.

Related: Atrial Flutter ECG ReviewDextrocardia ECG ReviewLimb Lead Reversal ECG Review