Interestingly, both skipped beats and extra beats or palpitations typically have the same cause: the heart’s regular rhythm is interrupted by a premature or early beat. If the premature beat arises from the atria (upper chambers), it is called a premature atrial contraction (PAC). If it arises from the ventricles (lower chambers), it is called premature ventricular contraction (PVC). In most cases, neither is considered dangerous, though exceptions exist. …..
Premature beats (早搏) are common in healthy people of all ages. Caffeine, alcohol, stress, and fatigue may cause PACs or PVCs to occur more frequently……
Premature atrial contraction
Premature atrial contractions (PACs), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common cardiac dysrhythmia characterized by premature heartbeats originating in the atria. While the sinoatrial node typically regulates the heartbeat during normal sinus rhythm, PACs occur when another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat……
PACs commonly occur in healthy young and elderly people without heart disease, and by themselves are not considered an abnormal finding…….
In most cases, no treatment other than reassurance is needed for PACs …..
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Premature ventricular contraction
A premature ventricular contraction (PVC) — also known as a premature ventricular complex, ventricular premature contraction (or complex or complexes) (VPC), ventricular premature beat (VPB), or ventricular extrasystole (VES) — is a relatively common event where the heartbeat is initiated by Purkinje fibers in the ventricles rather than by the sinoatrial node, the normal heartbeat initiator…….
Premature ventricular contractions can occur in a healthy person of any age, but are more prevalent in the elderly and in men. They frequently occur spontaneously with no known cause…..
Premature Ventricular Contractions (PVCs, PVC)
Premature ventricular contractions are common. Many people have premature ventricular contractions without any symptoms. Premature ventricular contractions may be more common among older patients, patients with high blood pressure, and patients with heart disease
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