How to Identify Pre-Excitation?

The classic electrocardiogram (ECG) criteria for pre-excitation syndrome include shortened PR interval, slurred upstroke of the QRS complex (delta wave), and increased QRS duration

owing to simultaneous fusion of activation of the ventricles via normal AV nodal conduction and via the accessory pathway.

What is pre-excitation on ECG?

Pre-excitation describes the electrical phenomena occurring in the heart and seen on ECG in some cases due to the presence of an AP. When there is an associated tachyarrhythmia due to the presence of an AP or in patients who experience symptoms due to the AP, this disorder is termed pre-excitation syndrome (PES).

What is the most common type of pre-excitation syndrome?

The most common preexcitation syndrome is Wolff - Parkinson-White syndrome, which affects 2/ 1000 people. The presence of an accessory pathway could result in serious consequences, ranging from supraventricular tachycardia to sudden cardiac death.