Atrioventricular block

Atrioventricular block called a violation of the electrical impulse through located  The mechanism of formation of atrioventricular block
 ventricles of the heart between the atria and the atrioventricular node.

Clinical symptoms of atrioventricular block

Atrioventricular block, depending on the particular violation of the electrical pulse is divided into several levels:

  • When atrioventricular block of 1 degree with slowing momentum carried;
  • Atrioventrikulyarnayablokada 2 degrees is called periodic pulse;
  • The complete absence of electrical pulse leads to the development of atrioventricular block grade 3.

When atrioventricular block of 1 degree pulse travels from the atria to the ventricles with a delay of a millisecond. This delay is clinically does not manifest itself and can only be detected during the ECG heart. This degree atrioventricular block often occurs in completely healthy people - teenagers, athletes, and people with high excitability of the vagus nerve. But it also can occur in people suffering from rheumatism, sarcoidosis. Atrioventricular block of 1 degree is sometimes caused by certain medications.

At 2 degree atrioventricular block, not all impulses coming from the atria reach the ventricles. As a result, the ventricles begin to contract in the wrong rhythm and less likely than the atria. 2 degree atrioventricular block in the absence of timely treatment can progress quickly and go to 3 degree atrioventricular block, which is one of the most dangerous types of cardiac arrhythmia.

When atrioventricular block grade 3 ventricular rhythm is given directly by the ventricles, as an electrical impulse from the atria to them does not pass through the atrioventricular node. As a result, ventricles least 40 times in one minute, the pumping function of the heart is greatly disturbed.

When this disease in patients observed bradycardia (a decrease in heart rate), severe dizziness, and fainting, blood pressure is usually reduced, even when there is little physical exertion dyspnea.

The causes of atrioventricular block:

  • Diseases of the heart (coronary heart disease, myocardial infarction, myocardial infarction, heart disease, cardiomyopathy, myocarditis, and others.);
  • Taking certain medicines (intravenous injection of papaverine solution, cardiac glycosides, antiarrhythmic drugs, beta-blockers);
  • Intensive exercise.


Diagnosis of the disease is based on its clinical symptoms. To confirm the diagnosis of heart is performed electrocardiography (ECG).

Treatment of atrioventricular block

Therapy  The attack atrioventricular block
 this type of cardiac arrhythmia is performed depending on the degree of disease.

1 degree atrioventricular block, even in cases where it is due to the development of any disease of the heart, does not require any treatment.

Degree atrioventricular block 2 in most cases does not require any of therapy. Only a small percentage of patients need to install a pacemaker.

Treatment of atrioventricular block grade 3 is the implantation of a pacemaker. In critical situations, using temporary pacemaker, and after stabilizing the heart rate and improve the overall condition of the patient is performed surgery to install permanent. In some cases, after recovery otzabolevaniya, cause the development of atrioventricular block, heart rhythm is completely restored. But most bolnyhnuzhdaetsya lifelong use of the pacemaker.