Asemptomatik Aort Darlığı Olan Hastaların Dikey Sistolik Fonksiyonlarının Strain ve Strain Rate ile Değerlendirilmesi

Aort darlığı olan yatay sistolik fonksiyonları (EF) korunmuş hastalarda kalbin dikey sistolik fonksiyonlarını yeni bir ekokardiyografik yöntem olan strain ve strain rate ile incelenmesi. Çalışmaya aort darlığı tespit edilen 18 ardışık (ortalama yaş 55±15yıl, 10 erkek) hasta dahil edildi. Kontrol grubu ise herhangi bir kapak hastalığı olmayan 12 ardışık (ortalama yaş 50±6yıl, 4 erkek) hastadan oluşturuldu. Tüm bireylerde, kılavuzlara uygun şekilde arka duvar, interventriküler septum, yan duvar, ön ve alt duvar renkli doppler görüntüleri alındı. Bütün ölçümler 3 siklusun ortalaması alınarak hesaplandı. Hasta verileri toplandıktan sonra akımların süreklilik denklemlerine göre aort kapak alanı hesaplandı. Alınan renkli doppler görüntülerinin “strain ve strain rate”lerinin görüntülerinin bazal kısmından hesaplandı. Sonuçta bakılan 5 duvarın ortalama “strain ve strain rate”lerini alarak toplam değer elde ettik. İstatistiksel analiz Student t-testi ve Mann-Whitney U testi kullanılarak yapıldı. Her iki grup arasında sol ventrikül ejeksiyon fraksiyonları anlamlı farklılık gösterse de korunmuş olarak bulundu (p=0.01). Aort darlığı olan grupta deselerasyon zamanı (DZ) normal gruba göre anlamlı derecede artmış olarak tespit edildi (p=0.03). Sol ventrikülün toplam strain ve strain rate değerleri açısından 2 grup arasında anlamlı fark bulundu (p=0,002). Sadece arka duvarlar arasında anlamlı fark bulunamadı (Hasta:1.82±0.50, kontrol:1.55±0.66, p=0.258). Aort darlığı olan hastalarda ekokardiyografik olarak bakılan toplam strain ve strain rate değerleri anlamlı şekilde azalmıştır.

Anahtar Kelimeler:

Aort Darlığı, Ekokardiyografi, Sistolik Fonksiyon, Strain, Strain Rate

Assessment of Longitudinal Systolic Functions of Patients with Asymptomatic Aortic Stenosis by Strain and Strain Rate

To investigate the longitudinal systolic functions of the heart with a strain and strain rate in patients with preserved horizontal systolic function (EF) with aortic stenosis. 18 consecutive patients (mean age 55±15 years, 10 men) with aortic stenosis were included in the study. The control group consisted of 12 consecutive patients (mean age 50±6 years, 4 men) without any valve disease. In all patients, color doppler images of the posterior wall, lateral wall, etc. were obtained in accordance with the guidelines. All measurements were calculated by taking the average of 3 cycles. After collection of patient data, the aortic valve area was calculated according to the continuity equations of currents. It was calculated from the basal portion of the images of the "strain and strain rates" of color doppler images. As a result, we obtained the total value by taking the average "strain and strain rates" of the 5 walls examined. The left ventricular ejection fractions were found to be preserved but not significantly different between the two groups (p=0.01). In the group with aortic stenosis, the deceleration time (DT) was found to be significantly higher than the normal group (p=0.03). There was a significant difference between the two groups in terms of total strain and strain rate values of the left ventricle (p =0.002). In patients with aortic stenosis, echocardiographic total strain and strain rate values decreased significantly.

Keywords:

Aortic Stenosis, Echocardiography, Strain, Strain Rate, Systolic Function,

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