Atrioventricular block - Causes, Symptoms and Treatment .MF .

August 12, 2017 17:52 | Diseases Of The Heart And Blood Vessels

atrioventricular blo

ck is one of the most formidable of cardiac conduction, accompanied by a sharp slowing of the heart rate and, as a consequence, loss of consciousness and symptoms of heart failure.According to statistics, in 17% of cases the cause of sudden cardiac death is AV block .

atrioventricular block - is a violation of the "bandwidth" of the AV node - which is the "connecting link" between the atrial and ventricular myocardium.When AV block first degree of impulse conduction through the AV node slows down when the second - to the ventricles is conducted only every second or third impulse came from the sinus node, with third degree (complete transverse blockade) - conduction of impulses fromatria to the ventricles completely stops.In this case cardiac arrest does not occur because, as the main "power" comes in a bundle branch block or other structure of the cardiac conduction system.This is accompanied by a rare heart rhythm, about 20-40 beats per minute.


atrioventricular block With this type of cardiac conduction are usually concerned:

  • general weakness;
  • dizziness;
  • shortness of breath;
  • fatigue.

If bradycardia appears:

  • episodes of blackout;
  • state close to unconsciousness ( "I want to grab hold of something, not to fall").

WARNING!The extreme manifestations of bradycardia are short-term bouts of unconsciousness (seconds) - "walked-walked - he came to himself lying on the floor."This may be preceded by a feeling of "hot flushes in the head."

Note.Prolonged loss of consciousness (5-10 minutes or more) is not characteristic of bradycardia.

Prevention atrioventricular block

Blockade serdtsachasche all yavlyaetsyaoslozhneniem underlying disease, usually coronary artery disease.Therefore, prevention is the adequate and timely treatment of the disease, and takzhevnimatelnomprieme drugs that slow the holding impusov on AV node.This medicinal preparatysleduyuschih groups blockers (atenolol, Egilok, Concor, Nebilet), calcium antagonists (verapamil, diltiazem), cardiac glycosides (Digoxin, Lanikor), antiarrhythmics (Cordarone, Sotaleks).

Secondary prevention (when set to a specific type of arrhythmia) in the AV block is not carried out.

Diagnostics atrioventricular block

primary diagnosis can serve as the presence of clinical manifestations brdikardii.

The next step is to record the electrocardiogram.

is often necessary to conduct Hour ECG (Holter monitoring) in the normal mode of life of the patient.It is possible that during the daily monitoring of arrhythmia and will not be registered.

In this case, a tilt - test.

Treatment of atrioventricular block

only method of treatment when atrioventricular block - implantation of a permanent pacemaker.This device restores normal heart rate.At the same time the volume of blood flowing to the organs, normalize, and bradycardia symptoms are eliminated.

main indications for implantation of a permanent pacemaker with atrioventricular block are:

  • symptomatic bradycardia (shortness of breath, dizziness, fainting).
  • break in the heart of more than 3 seconds or recorded heart rate less than 40 per minute.

For a better understanding of the A-blockade in grade 3 (complete), we apply the term separation of rhythm between the atria and ventricles.