With its first type, the condition worsens due to an increase in the duration of the delay of electrical impulses.
If a person is not provided with the necessary medical care, a complete heart block may occur, and the impulses will not reach the ventricles at all. In its second type, a critical impulse delay suddenly occurs, in which every second impulse does not reach the ventricles.
Atrioventricular blockade of the 3rd degree suggests a complete blockade. In this case, there is an absolute violation of atrioventricular conduction, the ventricles contract slowly, which causes a violation of blood circulation in the body. Symptoms of atrioventricular blockade of the 3rd degree include a sharply reduced pulse, dizziness, weakness, darkening of the eyes, pain in the heart, fainting, blue skin, and sometimes convulsions. Basically, the 3rd degree of calan is characteristic of people over 70 years of age who have a history of cardiac disorders. Unfortunately, the prognosis is poor and approximately 20% of patients with complete heart block are fatal.