Heart block:A blockageinthe conduction of the normal electrical impulses in theheart. Heart block is not uncommon and is detected with anelectrocardiogram. Heart block occurs from degeneration or scarring of the electrical pathways in theheart muscle, either naturally or as a result ofdisease. Heart block typically requires no treatment, but can be a factor in the decision of whether or not to put apacemakerin a heart that is failing or irregularly beating.
