Trifascicular block (TFB) refers to the presence of conducting disease in all three fascicles: RBBB, LAFB, LPFB. LITFL ECG Library
Right Bundle Branch Block (RBBB) activation of the right ventricle is delayed as depolarisation spreads across septum from left ventricle.
Bifascicular block is the combination of RBBB with either LAFB or LPFB. Conduction to the ventricles is via the single remaining fascicle.
ECG is from a 70yr old male who presented with chest pain and palpitations. Describe and interpret this ECG. LITFL Top 100 ECG
A 23 year-old man had an episode of syncope at home. He is in severe respiratory distress, extremely pale, dripping with sweat. ECG Exigency
Ashman phenomenon (1947) aberrant ventricular conduction, usually of RBBB morphology, which follows a short RR interval and preceeded by a relatively prolonged RR interval.
Middle-aged patient presenting with palpitations. Describe and interpret this ECG. LITFL Top 100 ECG. VT with Dominant R wave V1
Middle-aged patient presenting with chest pain. Describe and interpret this ECG. LITFL Top 100 ECG. anteroseptal STEMI, LAD occlussion