Cardiac conduction system disorders on the electrocardiogram (ECG) are common. Left bundle branch block (LBBB) is associated with adverse outcomes, and variants previously considered normal, such as right bundle branch block (RBBB),1 left anterior fascicular block,2 or PR interval prolongation,3 may also portend morbidity and mortality.
Narayan SM, Baykaner T, Maron DJ. Can Cardiac Conduction System Disease Be Prevented? JAMA Intern Med. 2016;176(8):1093–1094. doi:10.1001/jamainternmed.2016.2863
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: