Heart Block

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Related to congenital heart block: Congenital heart disease

heart block

[′härt ‚bläk]
The cardiac condition resulting from defective transmission of impulses from atrium to ventricle.

Heart Block


disruption of the conductivity of the nerve impulse along the conductive system of the heart. Types of heart blocks—intra-auricular (sinoauricular) blocks, au-riculoventricular (atrioventricular) blocks, and blocks of the peduncles of the bundle of His and of the terminal branches—are distinguished depending on the site of the disruption. Heart block may be caused by organic diseases of the myocardium (rheumocarditis, coronary cardiosclerosis), more rarely by intoxications, and also by functional disturbances of the nervous system (neuroses). It may be temporary or permanent, complete or partial. Bradycardia (slowing of the pulse to 18–10 beats per minute) is noted in cases of complete heart block; this leads to severe anemia of the brain accompanied by dizziness, loss of consciousness, and sometimes convulsions. Treatment is directed at eliminating the causes of the heart block.


References in periodicals archive ?
Future Research Directions for Autoimmune-associated Fetal Congenital Heart Block
Brito-ZerAaAaAeA n P, Izmirly PM, Ramos-Casals M, Buyon JP, Khamashta M The clinical spectrum of autoimmune congenital heart block.
Low titer, isolated anti ro/SSA 60 kd antibodies is correlated with positive pregnancy outcomes in women at risk of congenital heart block.
Cardiac manifestations of neonatal lupus a review of autoantibody-associated congenital heart block and its impact in an adult population.
AntiSSA/Ro and anti-SSB/La antibody-mediated congenital heart block.
Maternal autoantibody levels in congenital heart block and potential prophylaxis with antiinflammatory agents.
Participants also should have a previous child with congenital heart block of any degree, which has been documented by EKG and/or echocardiogram; with confirmed characteristic lupus rash; or with congenital heart block and rash.
Those with a fetus with structural lesions that could cause congenital heart block also are excluded.
The initiation of dexamethasone or plasmapheresis as a preventative measure against congenital heart block in high-risk pregnant women is currently under consideration but is not yet justified.
Kaaja R and Julkunen H (2003) Prevention of recurrence of congenital heart block with intravenous immunoglobulin and corticosteroid therapy: comment on the editorial by Buyon et al.
ABBREVIATIONS: CCHB: Complete congenital heart block.
The timing and frequency are important because the fibrosis of congenital heart block develops very quickly, and almost always occurs between weeks 18 and 23, she said.

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