DDELTA WAVE IN ECG AND ITS INTERPRETATION IN ECG

DELTA WAVE IN ECG

1. DELTA WAVE Dr.G.VENKATA RAMANA MBBS DNB FAMILY MEDICINE

2. Delta wave   Slurred upstroke in the QRS complex It relates to pre-excitation of the ventricles, and therefore often causes an associated shortening of the PR interval It is most commonly associated with pre-excitation syndromes such as WPW

3. The characteristic ECG findings in Wolff-Parkinson-White syndrome are: Short PR interval (< 120ms) Broad QRS (> 100ms) A slurred upstroke to the QRS complex (the  delta wave )

4. ECG examples of Delta Waves Delta wave Note that the remainder of the QRS remains normal — conduction still occurs through the AV node and this is the dominant pathway On arrival to the ventricles, such conduction cancels out any pre-excitation that has occurred via an accessory pathway

5. Negative delta waves (e.g. seen in lead aVR ) These changes are simply reciprocal to those seen in leads II, aVL , V5 and V6