Cardinal Features and Treatment
The cardinal features of fascicular VT are:
- RBBB pattern
- Left axis deviation
- QRS duration 0.11-0.14 seconds
Treatment
It is important to identify this arrhythmia correctly so that it is not treated as an SVT: though verapamil can be an effective treatment in those with known sensitivity, it can cause sudden cardiovascular collapse [3].
Learning Bite
As a fascicular tachycardia originates in specialised conduction tissue, the QRS complexes have a short duration (0.11-0.14 seconds) and as a consequence the arrhythmia may be thought to be supraventricular in origin.