P Wave Dispersion Detected from the Surface Electrocardiography and Atrial Fibrillation

Öz

P dalgası dispersiyonu; farklı yüzey elektrokardiyogram derivasyonlarından kaydedilen en uzun ve en kısa P dalgası arasındaki fark olarak tanımlanmaktadır. Yüzey elektrokardiyogramından ölçülen P dalgası dispersiyonu, sol atriyal genişlemeyi ve bozulmuş iletiyi yansıtmaktadır. P dalgası dispersiyonu ve maksimal P dalgası süresi atriyal kasın aktivasyonunu göstermektedir ve temel olarak uyarılan doku miktarına bağımlıdır. Bu iki parametre, homojen olmayan ve süreksiz atriyal iletimle karakterize olan atriyal fibrilasyon gelişimi riskinin değerlendirilmesinde kullanılmaktadırlar. P dalgası dispersiyonunun; sol atriyum boyutlarında ve uyarı iletim hızındaki değişime neden olan, otonom sinir sistemi aktivasyonundan etkilendiği gösterilmiştir. P dalgası dispersiyonunun klinik anlamlılığı başta paroksismal atriyal fibrilasyon olmak üzere birçok klinik durumda gösterilmiştir. Bu derlemenin amacı P dalgası dispersiyonu ile atriyal fibrilasyon ilişkisini incelemektir.

Anahtar Kelimeler

• Electrocardiography, P wave dispersion; atrial fibrillation

Yüzey Elektrokardiyografiden Saptanan P Dalga Dispersiyonu ve Atriyal Fibrilasyon

Öz

P wave dispersion is defined as the difference between the longest and the shortest P wave duration recorded from multiple different surface electrocardiogram leads. P wave dispersion, detected from the surface electrocardiography, have been though to reflect left atrial enlargement and altered conduction. P wave dispersion and P wave maximal duration reflects the activation of atrial muscle and depends primarily upon the mass of tissue excited. These two parameters have been used in the assessment of the risk for atrial fibrillation which is characterized by nonhomogeneous and discontinuous atrial conduction. P wave dispersion has been showed to be influenced by the autonomic nervous system activation, which induces changes in left atrial size and the velocity of impulse conduction. The clinical significance of P wave dispersion has been demonstrated in many clinical conditions, especially in paroxysmal atrial fibrillation. The purpose of this review is to investigate the association between P wave dispersion and atrial fibrillation.

Anahtar Kelimeler

• Elektrokardiyografi, P dalgası dispersiyonu; atriyal fibrilasyon

Kaynakça

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