QT and P wave dispersion QT ve P dispersiyonu

Abstract

Keywords

• -

QT ve P dispersiyonu

Abstract

Refrakter periyodun ve iletim hızının heterojenitesi re-entran aritmilerin temel mekanizmasını oluşturur.Ventriküler refrakteritenin heterojenitesini gösteren indekslerden biri yüzey elektrokardiyogramından (EKG) elde edilen QT dispersiyonudur. QT dispersiyonunu hesaplamada en çok kullanılan yöntem 12 derivasyonlu EKG’de en uzun ve en kısa QT intervalinin farkının alınıp hıza veya kullanılan derivasyon sayısına göre düzeltilmesidir.Anormal olarak artmış QT dispersiyonu bazı hastalıklarda (kardiyak ve nonkardiyak) aritmik ölüm riskini artırır. QT dispersiyonu bazı ilaçların etkinlik ve proaritmik potansiyeli hakkında da fikir veren basit,pratik,ucuz bir parametredir. Bu derlemede QT dispersiyonunun ölçümü, yorumu, klinik önemi ve diğer bir kavram olan P dispersiyonu anlatılmıştır.

Keywords

• QT dispersiyonu, P dispersiyonu, aritmi

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