sinoatrial exit block
sinoatrial exit blockCardiology Sinus-node dysfunction, aka sick sinus syndrome characterized by a normal P-wave axis EKG Progressive shortening of PP interval until one P wave fails to conduct–2nd degree, type I–or sinus pause is an exact multiple of the baseline PP interval–2nd degree, type II. See Sick sinus syndrome.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.