All ECG 166
- Atrial fibrillation with a slow ventricular response (note the coarse fibrillatory waves)
- Limb lead reversal
If the limb lead that was supposed to be attached to the right arm is put on the left arm and vise-versa, a characteristic appearance will be seen on ECG that includes:
1) Predominantly negative P wave, QRS complex, and T wave in lead I (not seen on this ECG due to atrial fibrillation)
2) Predominantly upward P wave, QRS complex, and T wave in aVR
This is the opposite that is seen in a normal ECG. The above findings are similar to that seen in a person with dextrocardia, however if the heart is located in the right side of the chest instead of the left, the voltage in leads V3-V6 will be very low. This would not be seen in simple limb lead reversal.
Related Topic Reviews: Atrial Fibrillation ECG Review