Gebelikte Frontal QRS-T Açısının Değerlendirilmesi

Abstract

Amaç: Bu çalışmadaki amacımız gebe kadınlarda repolarizasyon defekti ve aritmojenik yatkınlığın önemli bir göstergesi olan frontal QRS–T (fQRS-T) açısındaki değişikliklerin gebe olmayan kadınlara ve trimester gruplarına göre değerlendirmektir. Gereç ve yöntemler: Çalışmaya kardiyak veya kronik hastalık öyküsü olmayan 157 gebe ve kontrol grubu olarak 150 sağlıklı gebe olmayan kadın dahil edildi. PR, QRS, QT, düzeltilmiş QT ve fQRS-T açıları manuel olarak hesaplandı. Her üç trimesterin EKG verilerine erişilebilen 58 gebe kadının EKG'sinde trimester değişikliklerinin etkilerini araştırmak için alt grup analizi yapıldı. Bulgular: Çalışmaya katılanların yaş ortalaması 31±7 yıl idi. Gebelerin ve kontrol grubunun kalp atım hızları sırasıyla 83±12 bpm ve 76±14 bpm (p<0.001) iken, fQRS–T açıları sırasıyla 27.6°±17.7° ve 20.7°±6.6° olarak ölçüldü (p<0.001). Frontal QRS-T açısında da birinci trimesterden (34.4±15.4) ikinci (26.5±14.8) ve üçüncü (23.3±20.3) trimesterlere (p = 0.003) ilerlemede anlamlı azalma saptandı. Gebelik haftası fQRS-T açısı ile istatistiksel olarak anlamlı negatif korelasyon gösterdi (r = -0.233; p = 0.003). Sonuç: fQRS-T açısı, normal aralıkta kalsa bile, gebe kadınlarda gebe olmayanlara göre ve aynı zamanda birinci trimester gebe kadınlarda ikinci veya üçüncü trimestere göre daha büyüktü.

Keywords

• Aritmi
• elektrokardiyogram
• frontal QRS-T açısı
• gebelik
• ventriküler repolarizasyon.

EVALUATION OF THE FRONTAL-PLANE QRS-T ANGLE IN PREGNANCY

Abstract

Objective: Our aim in this study was to evaluate changes in the frontal QRS–T (fQRS-T) angle, which is an important indicator of repolarisation defects and arrhythmogenic predisposition, in pregnant women relative to non-pregnant women and between trimester groups. Material and Methods: One hundred fifty-seven pregnant women with no history of cardiac or chronic disease and 150 healthy non-pregnant women as a control group were included in this study. PR, QRS, QT, corrected QT and fQRS-T angles were calculated manually. Subgroup analysis was performed to investigate the effects of changes in trimester on ECG of 58 pregnant women, whose ECG data of all three trimesters could be accessed. Result: The mean age of study participants was 31±7 years. The heart rates of pregnant women and the control group were 83±12 bpm and 76±14 bpm respectively (p<0.001), while fQRS–T angles measured 27.6°±17.7° and 20.7°±6.6° respectively (p<0.001). The frontal QRS-T angle was also detected significantly decrease in the progression from the first trimester (34.4±15.4) to the second (26.5±14.8) and third (23.3±20.3) trimesters (p=0.003). Gestational week had a statistically significant negative correlation with fQRS-T angle (r = −0.233; p=0.003). Conclusion: The fQRS-T angle, even if remained within the normal range was larger in pregnant women than in non-pregnant women and also larger in first trimester pregnant women relative to those in the second or third trimester.

Keywords

• Arrhythmia
• electrocardiogram
• frontal QRS-T angle
• pregnancy
• ventricular repolarisation.

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