Atrial Premature Beats Information


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Home :: Diseases :: Atrial Premature Beats

Atrial Premature Beats Information

Atrial premature beats occur when an ectopic focus in the atria fires before the next sinus node impulse or a reentry circuit is established. The contour of the P wave usually differs from the patient's normal complex. The subsequent RR cycle length is usually unchanged or only slightly prolonged. Such premature beats occur frequently in normal hearts and are never a sufficient basis for a diagnosis of heart disease. Speeding of the heart rate by any means usually abolishes most premature beats. Early atrial premature beats may cause aberrant QRS complexes (wide and bizarre) or may be nonconducted to the ventricles because the latter are still refractory.

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