Extrasystole Insert

Extrasystole or extrasystolic cardiac arrhythmia is ectopic cardiac activity that is outside the normal sinus pacemaker (heartbeat).

Extrasystoles are of two types: premature and late.

- **Premature:** Atrial extrasystoles are the appearance of an extraordinary impulse in the atrium. Ascending excitation is transmitted through the conduction system of the atrium to the sinus. But due to the fact that the myocardial area has a reduced electrolyte composition, the ecdysotropic (causing contraction) potential is sufficient to cause atrial contraction. The RR intervals from such a pulse can be different - from 15 ms to several hundred ms.

Certain types of premature extrasystoles may have a name when a sensation first appears in the heart area. These are atrial fibrillation and flutter (on their basis, heart rhythm disturbances usually develop), atrial runs (supraventricular paroxysmal tachycardia, accompanied by hemodynamic disturbances), as well as some extrasystoles of complex shapes that do not have an exact name. These rhythm disturbances rarely spread from the atrium to the ventricles and are most often explained by the presence of additional

Scientific definition

Extrasystole in cardiac and general therapy is the appearance of an extraordinary cardiac contraction caused by premature excitation of the myocardium. One of the most common manifestations of extrasystoles is their atrial form. Extrasystole is a common sign of various heart diseases; in 50% of cases it occurs with paroxysmal tachycardia.