Title: Bi & Tri-fascicular Blocks
题目：双束支和三束支传导阻滞
Author （作者）：Semhar Tewelde

Bifascicular block 双束支传导阻滞
Right bundle branch block (RBBB) + left anterior fascicular block (LAFB) 
右束支传导阻滞（RBBB）+左前分支阻滞（LAFB）
RBBB + left posterior fascicular block (LPFB)
右束支传导阻滞（RBBB）+左后分支阻滞（LPFB）

Incomplete Trifascicular block不完全三束支阻滞
Bifascicular block w/1st degree AV block    *classically referred to as “trifascicular block”*
双束支阻滞伴1度房室传导阻滞*这是经典的“三束支传导阻滞”*
Bifascicular block w/2nd degree AV block
双束支阻滞伴2度房室传导阻滞
Alternating LBBB + RBBB
左束支传导阻滞+右束支传导阻滞交替出现
Complete Trifascicular block完全三束支阻滞
Bifascicular block w/3rd degree AV block 
双束支阻滞伴3度房室传导阻滞
References参考文献
Surawicz B, Knilans T. Chou’s Electrocardiography in Clinical Practice (6th edition), Saunders 2008. 
Wagner, GS. Marriott’s Practical Electrocardiography (11th edition), Lippincott Williams & Wilkins 2007.
Levis J, Garmel G. Clinical Emergency Medicine Casebook, Cambridge University Press 2009.