Heart Block

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Related to congenital heart block: Congenital heart disease

heart block

[′härt ‚bläk]
(medicine)
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.

O. F. BORDIUG

References in periodicals archive ?
Congenital heart block is a rare disorder, usually associated with maternal transfer of antinuclear antibodies, especially those against Ro.
AntiSSA/Ro and anti-SSB/La antibody-mediated congenital heart block.
The risk of congenital heart block is about 2% in a first pregnancy for women with anti-Ro and anti-La antibodies, but the risk jumps to 20% in subsequent pregnancies in women who have had a previous child with congenital heart block or neonatal lupus-related rash, coinvestigator Dr.
Among the infants with manifestations of neonatal lupus, 15 had congenital heart block only, three had heart blocks plus a rash, and seven had the rash alone.
Congenital heart block is a significant permanent effect of neonatal lupus in offspring of anti-Ro--positive women.

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