All of the following lead to AV block except?: (A) Hypothyroidism, (B) Ankylosing spondylitis, (C) Lyme disease, (D) Lev's disease
Answer is B. Myxedema AV node can block Ankylosing spondylitis will not cause av block Lyme disease caused by Borrelia burgdorferi, transmitted by Tick Bite & causes Myocarditis & AV block. Lev's disease= Idiopathic fibrosis of conduction system.