What symptom does the third degree atrioventricular block appear

summary

Special attention should be paid to the case of atrioventricular block. We should be alert at any time. Atrioventricular block is not a stranger to this term. As the name suggests, this disease occurs in the process of heart conduction. Conduction abnormality between atrium and ventricle can lead to arrhythmia, making the heart unable to contract normally and pump blood. Clinically, it is caused by various reasons Myositis is the most common, such as rheumatic myocarditis, viral myocarditis and other infections. The causes of myositis vary greatly among different age groups. I will share with you some of the reasons why children are easy to get this disease.

What symptom does the third degree atrioventricular block appear

The first is congenital complete atrioventricular block, the incidence rate of live birth is 1/22000, 30% of the children are congenital heart disease, the major vessels are malpositioned, single ventricle is more common, 70% are isolated, no cardiovascular malformations, such as autoimmune diseases, and the embryonic development of atrioventricular junction.

Second: in congenital diseases, the mother suffered from autoimmune diseases during pregnancy, the common systemic lupus erythematosus, can be in the asymptomatic period; rheumatoid arthritis, dermatomyositis and Sjogren's syndrome are rare. Congenital heart disease and interruption of atrioventricular conduction system are common in the malformations of embryonic development of atrioventricular junction. The earliest occurrence is at 16 weeks of gestational age. Cesarean section can be performed because of slow fetal heart rate and mistaken for intrauterine asphyxia. Some cases have stillbirth or systemic edema at birth, hepatomegaly and heart failure. The clinical symptoms depend on the degree of cardiac malformation and slow heart rate.

Third, acquired complete atrioventricular block (AVB) usually occurs in intracardiac surgical trauma, acute infection, viral myocarditis, cardiomyopathy and Kearns Sayre syndrome (external ophthalmoplegia, retinitis pigmentosa and mitochondrial myopathy), digitalis poisoning, hypokalemia, etc. AVB can also occur. In addition to primary diseases, its clinical manifestations are slow heart rate and often fatigue, Chest tightness, drowsiness, etc. in severe cases, acute Stokes syndrome, heart failure or sudden death occur.

matters needing attention

When finding that the child has unexplained fatigue, dizziness or even syncope, parents must not take it lightly. They need to go to a regular hospital for treatment, and carry out detailed cardiac electrophysiological and structural examination. Once they are diagnosed with high atrioventricular block, they often need pacemaker implantation.