ectopic beat

The ectopic beats were increasing in frequency.

An escape beat is a form of cardiac arrhythmia, in this case known as an ectopic beat.

If there are only one or two ectopic beats, they are considered escape beats.

Increasing repetitiveness of ventricular ectopic beats is associated with an increased mortality (Figure 3).

This effect leads initially to bigeminy: regular ectopic beats following each ventricular contraction.

A wide range of electrocardiographic abnormalities were recorded in both oxygen and air groups, of which ventricular and supraventricular ectopic beats were the most common.

Therefore, on ECG, the coupling intervals of the manifest ectopic beats will wander through the basic cycle of the sinus rhythm.

It may cause AV junctional rhythm and ectopic beats (bigeminy) resulting in ventricular tachycardia and fibrillation.

This anxiety is aggravated by the common, but non-serious, symptoms which are so common after the attack, i.e. left-sided chest pains, ectopic beats causing palpitations, light-headedness and weariness.

Depending upon the origins of the ectopic beat within the myocardium, an ectopic beat can be further classified as either a premature ventricular contraction or a premature atrial contraction.

Tveskov C, Djurhuus MS, Klitgaard NAH, Egstrup K. Potassium and magnesium distribution, ECG changes, and ventricular ectopic beats during beta-2-adrenergic stimulation with terbutaline in healthy subjects.

The origin of the ectopic beats is usually from one of the three regions of fatty degeneration (the "triangle of dysplasia"): the RV outflow tract, the RV inflow tract, and the RV apex.

There are two important cut-off points; at a rate of above 10 ventricular ectopic beats per hour the mortality increases steeply to above 20% and plateaus out at a rate of 30 per hour associated with a 1-year mortality of 30%.

Ectopic beat (or cardiac ectopy) is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats arise from fiber or group of fibers outside the region in the heart muscle ordinarily responsible for impulse formation, i.e., the Sinoatrial node.