###Human: Is it safe to go under anesthesia if I have bifascicular bundle block? ###Assistant: Hello, Welcome back to icliniq.com. Bifasicular block is commonly RBBB (right bundle branch block) with left or right axis deviation. I need to explain to you that patients with this block are safe to undergo anesthesia. I would have been happy if an ECG was attached. If LBBB (left bundle branch block) is associated with the bifascicular block, only then the risk increases, which is complete heart block which needs a pacemaker. In brief, there is no added risk due to bifascicular block. Please tell the anesthetist about this condition so that he keeps a temporary pacemaker ready if the need arises. There is just a 1 % chance of complete heart block. For more information consult an anesthesiologist online -->