A rare form of trifascicular block with intermittent complete atrioventricular block in a patient with Chagas disease.
Trifascicular block, which consists of impaired conduction in the three main fascicles of the ventricular conduction system, may progress to high-grade or complete atrioventricular block. Exceptionally, it is possible to register in the same patient paroxysmal alternating atrioventricular block and bilateral bundle branch block. This is the electrocardiogram of a male, 60 year-old patient coming from an endemic area, with positive serology for Chagas disease, with the exclusively dromotropic form (there are no signs of cardiac muscle involvement), manifest by repetitive pre-syncope and syncope episodes.
Femenia
Francisco
F
Unidad de Arritmias, Departamento de Cardiología, Hospital Espanol de Mendoza, Argentina. femeniafavier@hotmail.com
Cuesta
Alejandro
A
Mauricio
Arce
A
D054537:Atrioventricular Block / Q000469:parasitology* / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000469:parasitology* / Q000503:physiopathology; D014355:Chagas Disease / Q000150:complications* / Q000469:parasitology / Q000503:physiopathology; D015716:Electrocardiography, Ambulatory; D006329:Heart Conduction System / Q000469:parasitology* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013575:Syncope / Q000469:parasitology