title: Two-to-one sinoatrial block. Normalization by carotid massage.
abstract: In a clinical case of 2:1 sinoatrial block, carotid massage, paradoxically, released the sinoatrial block and doubled the manifest sinus rate. This resulted from a deceleration of the sinus discharge rate which allowed consecutive sinus impulses to traverse the sinoatrial junction.
authors.affiliation: 3rd Department of Medicine, Semmelweis University Medical School, Budapest, Hungary.
authors.forename: L
authors.initials: L
authors.lastname: Littmann
authors.forename: J
authors.initials: J
authors.lastname: Tenczer
authors.forename: R H
authors.initials: RH
authors.lastname: Svenson
mesh_terms: D000368:Aged; D002346:Carotid Sinus / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000628:therapy*; D006801:Humans; D008405:Massage; D012848:Sinoatrial Block / Q000503:physiopathology / Q000628:therapy*