second-degree atrioventricular block (DOID:0050822)
Alliance: disease page
Synonyms: second-degree heart block
Definition: An atrioventricular block that is characterized by progressive prolongation of the PR interval on consecutive beats followed by a blocked P wave on electrocardiogram or intermittently non-conducted P waves not preceded by PR changes on electrocardiogram caused by a conduction block between the atria and the ventricles through the atrioventricular node.