[Complete congenital heart block. Its natural history and evolution]. / Bloqueo auriculoventricular completo congénito. Historia natural y evolución.
Arch Inst Cardiol Mex
; 69(3): 241-9, 1999.
Article
em Es
| MEDLINE
| ID: mdl-10529858
This study describes the natural history and evolution of 67 patients with congenital auriculoventricular heart block admitted in the Instituto Nacional de Cardiología "Ignacio Chávez", Mexico, D.F. from 1944 to 1998. There were 35 (52%) females and 32 (47%) males, with mean follow up period of 93.7 +/- 104 months. Most of the patients were without structural cardiovascular disease (90%). The most frequent symptoms were dyspnea and syncope. Electrocardiograms showed a ventricular heart rate of 42.2 +/- 9 beats/minute. 85.7% of patients had a supra-Hisian complete heart block. In 31% of patients a pacemaker was implanted because syncope. Overall mortality was 4.4% and malignant ventricular arrhythmias were the principal contributors. Risk factors for mortality identified in this study were junctional escape rhythm lower than 50 beats/minute, inappropriate chronotropic response during exercise, R-R interval prolongation at night, enlargement of cardiac chambers, depressed left ventricular ejection fraction and prolonged QT interval. In all of these conditions we recommend permanent pacemaker implantation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bloqueio Cardíaco
Tipo de estudo:
Diagnostic_studies
/
Incidence_studies
/
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
/
Child
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Child, preschool
/
Female
/
Humans
/
Infant
/
Male
País/Região como assunto:
Mexico
Idioma:
Es
Revista:
Arch Inst Cardiol Mex
Ano de publicação:
1999
Tipo de documento:
Article
País de publicação:
México