Atrial Fibrillation with Ventricular Pre-Excitation: A Diagnosis That Must Not Be Missed

Wolff-Parkinson-White (WPW) syndrome is caused by an accessory pathway that communicates between the atria and ventricles known as Bundle of Kent. The development atrial fibrillation, can result in impulses all being conducted via a sinister, board complex, irregular tachycardia, with varying QRS morphology (known pre-excited fibrillation) Adenosine potent atrioventricular node blocker, which be used treatment supraventricular tachycardias, but also has diagnostic utility, particularly differentiating tachycardia aberrant conduction (which would often terminate) ventricular not respond to adenosine). However, administration adenosine fibrillation precipitate 1:1 conduction, degenerate into life-threatening arrythmias. This case describes patient who presented received intravenous resulted broad complex haemodynamic compromise. In patients pre-exited AV nodal blocking agents should avoided direct current cardioversion utilised.