Koroner Yavaş Akımda P Dalga Dispersiyon ve QTc Dispersiyonu

Abstract

Giriş: Bu çalışmada  koroner yavaş akım (KYA) tespit edilen hastalar ile normal koroner anatomi (NKA)  tespit edilen hastalar arasında P dalga dispersiyonu ve QTc dispersiyonu karşılaştırıldı ve KYA ile P dalga dispersiyonu ve  QTc dispersiyonu arasındaki ilişkinin belirlenmesi  amaçlandı.

Hastalar ve Yöntem: Çalışmaya 40 NKA ve 42 KYA olmak üzere toplam 82 hasta alındı. Koroner kan akımı TIMI kare sayısına göre hesaplandı. Elektrokardiyografi çekimleri her derivasyon için en az 3 QRS kompleksi içerecek şekilde, 50 mm/saniye hızında, 20 mV amplitüdünde ve standart 12 derivasyonda çekildi. En uzun p dalgası Pmax ve en kısa p dalgası Pmin olarak kabul edildi. En uzun P dalgası ile en kısa p dalgası arasındaki farkı P dispersiyonu kabul edildi. QTc dispersiyonu ölçümleri için öncelikle kalp hızına göre Bazzet formülü (QT/√R-R) ile düzeltilmiş QT aralığı hesaplandı. En uzun QTc aralığı (QTcmax) ile en kısa QTc (QTcmin) aralığı arasındaki fark hesaplanarak ölçüldü. Bütün ölçümler manuel olarak yapıldı.

Bulgular: Bu çalışma  KYA grubunda  P dispersiyonu (sırası ile  53.2 ± 5.35 ve 46.07 ± 4.12,  p< 0.0001),  Pmax (sırası ile 106.2 ± 10.11 ve 97.7 ± 8.17, p< 0.0001), maksimum QTc (sırası ile 438.96 ± 16.77 ve 426.13 ± 10.01, p< 0.0001) ve QTc dispersiyonu (sırası ile 68.99 ± 4.34 ve 61.64 ± 4.15, p< 0.0001) sürelerinin NKA grubuna  göre istatistiksel olarak anlamlı derecede uzun olduğunu göstermektedir.

Sonuç: Bu çalışma koroner yavaş akım da P dalga dispersiyonu ve QTc dispersiyonu sürelerinin arttığını göstermektedir.

Keywords

• Koroner yavaş akım,P dalga dispersiyonu,QTc dispersiyonu

P-Wave and QT Dispersions on Electrocardiography in Coronary Artery Slow Flow Phenomenon

Abstract

Introduction:  The purpose of this study was to analyse P-wave and QT dispersions on electrocardiography in patients with CSFP and compare the findings with those of patients with NCA.

Patients and Methods: This study included a total of 82 patients (40 patients with NCA and 42 patients with CSFP). Coronary blood flow was calculated according to the thrombolysis in myocardial infarction (TIMI) frame count. Electrocardiograms were obtained at a rate of 50 mm/s and amplitude of 20 mV, including at least 3 QRS complexes for each derivation, and were taken with 12 standard deviations. The longest P-wave duration was defined as Pmax, and the shortest P-wave duration was defined as Pmin. The difference between Pmax and Pmin was defined as P-wave dispersion. QTc, which is the QT interval corrected for heart rate, was measured according to Bazett’s formula. The difference between the longest QTc and shortest QTc was considered as QTc dispersion. All measurements were performed manually.

Results: This study demonstrated that P-wave dispersion (53.2 ± 5.35 and 46.07 ± 4.12, p < 0.0001, respectively), Pmax (106.2 ± 10.11 and 97.7 ± 8.17, p< 0.0001, respectively), maximum QTc (438.96 ± 16.77 and 426.13 ± 10.01, p< 0.0001, respectively) and QTc dispersion (68.99 ± 4.34 and 61.64 ± 4.15, p< 0.0001, respectively) were significantly prolonged in the CSFP group than the NCA group.

Conclusion: This study demonstrated that P-wave and QTc dispersions were prolonged in the CSFP group.

Keywords

• Coronary slow flow,P-wave dispersion,QTc dispersion

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