Heart Block

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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 ?
The patient remained in complete heart block and on temporary pacing.
If it's left untreated, complete heart block may lead to acute heart failure, chronic heart failure, stroke, shock and even death.
Late recovery of atrioventricular conduction after pacemaker implantation for complete heart block associated with surgery for congenital heart disease.
A recent prospective study compared single-chamber ventricular pacing with dual-chamber pacing in elderly patients with complete heart block [17].
9%) patients, and complete heart block that occurred in one patient in whom permanent pacemaker was inserted.
Yesil et al studied 53 pacemaker patients with complete heart block and significant CAD, defined by the presence of a coronary lesion with greater than 70% stenosis.
Common causes for congenital complete heart block in infants being, as an isolated anomaly, with congenitally corrected transposition of great arteries, maternal diseases like systemic lupus erythematosis, Sjogren's syndrome or there connective tissue disorders.
Complete heart block is the most common finding in patients with clinically evident CS and is reported in up to 30 percent of patients.
Arrhythmia, rarer in children, manifests as ventricular tachyarrhythmia, atrial fibrillation, left bundle branch block, paroxysmal supraventricular tachycardia, complete heart block and Wolf-Parkinson-White syndrome.
The symptoms may come on gradually or suddenly and they typically include: Palpitations (an awareness of having an irregular, abnormal or a heavy heartbeat) Light-headedness and loss of consciousness if the heart stops beating completely Shortness of breath | Chest pain If it's left untreated, complete heart block may lead to acute heart failure, chronic heart failure, stroke, shock and even death.

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