Exit Block by ECG Finding

**Semantic type:** Finding

**Definition:** An electrocardiographic finding in which impaired conduction or automaticity within the sinus node results in the failure of impulse transmission from the sinoatrial node. This is manifested as dropped P waves during sinus rhythm. (CDISC)

**Synonyms:** - Exit Block - Exit Block by EKG Finding - SA Block - SINOATRIAL EXIT BLOCK - Sinoatrial Block - Sinoatrial Exit Block - Sinoatrial Node Exit Block - Sinoatrial exit block