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

Year 2019, Volume: 6 Issue: 1, 1 - 4, 20.03.2019

Ahmet Genç , Şevket Görgülü Mehmet Eren

Abstract

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

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

Abstract

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.

Keywords

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

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