Atrioventricular nodal reentry tachycardia (AVNRT): ECG features & management
Atrioventricular Nodal Reentry (Reentrant) Tachycardia (AVNRT): clinical features, mechanisms, ECG & management Atrioventricular nodal reentrant tachycardia (AVNRT) is a common tachyarrhythmia occurring in all age groups, from children to the elderly. AVNRT is common also among individuals who are healthy. This arrhythmia typically starts and terminates very abruptly. It causes symptoms typical of a supraventricular tachyarrhythmia; palpitations, dyspnea, chest discomfort and anxiety. Because the tachyarrhythmia is supraventricular in origin, the ventricles are depolarized normally via the His-Purkinje system and in most cases there is no adverse hemodynamic effect. However, if the AVNRT is very fast, or if the patient suffers from heart disease, it may lead to symptoms suggestive of diminished cardiac output (pre-syncope, syncope, etc). Definition of Paroxysmal Supraventricular Tachyarrhythmia (PSVT) The arrhythmias AVNRT, AVRT (Pre-excitation, Wolff-Parkinson-White syndrome) and ec…
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Cuộc đời thì ngắn, mà nghề thì miên man;cơn bệnh phập phù;kinh nghiệm hiểm nguy, còn quyết định thì thật khó.Người thầy thuốc không phải chỉ chuẩn bị để tự mình làm đúng, mà còn khiến cho bệnh nhân, người đi theo và các yếu tố xung quanh hợp tác hài…