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 ?
Acute neuropathy with multiple conduction blocks after TNF a monoclonal antibody therapy.
28] Thus, a disruption in the myelin sheath causes delayed conduction velocity, or conduction block.
Cardiac Surgeons Report on the Direct Connection Between Conduction Block Testing with the AFfirm[TM] Bipolar Pacing Probe and Cardiac Ablation Success
Electrocardiography (ECG) revealed bradycardia with a ventricular rate of 57 bpm and intraventricular conduction block (QRS: 0.
The ORLab(TM) system is a mapping, recording and stimulating system which enables electrophysiologists and surgeons to confirm, in the operating room, that the cardiac ablation lines being created are forming electrical barriers, or lines of conduction block.
Our second case identifies high-grade AV conduction block complicating TC.