AI Summary & Key Takeaways
AI InsightCONCLUSIONS: The analysis of tricuspid annular velocities obtained by tissue Doppler technique is a practical method of the assessment of right ventricular systolic functions.
📌 3 Key Takeaways
Abstract
OBJECTIVE: Since there is a difficulty in the assessment of right ventricular systolic function by 2D echocardiography, a noninvasive, practical and, cost effective method is desirable. Tissue Doppler technique enables to visualize systolic and diastolic velocities of the tissue through sample volume replacement. In this study, we aimed to evaluate the relationship between tricuspid annular tissue Doppler velocities and right ventricular systolic functions. METHODS: For this purpose, tricuspid annular systolic (S), early diastolic (E) and, late diastolic (A) velocities were obtained from 38 patients (23 with dilated cardiomyopathy, 15 with mitral stenosis, all of them in sinus rhythm) and 15 healthy control subjects by placing the pulsed wave sample volume at the junction of right ventricular free wall and tricuspid annulus. The time velocity integral (TVI) of S, peak velocity of S and isovolumic contraction time (IVCT) were compared with right ventricular ejection fraction (RVEF) determined by 2D echocardiographic hemi-elliptic shell model, peak velocity of tricuspid regurgitation and dP/dt calculated from the spectral trace of this regurgitation. RESULTS: A significant correlation was determined between RVEF and peak S velocity, S TVI and IVCT (r: 0.76, p 75 msec yielded 76%, 84%, 92% sensitivity and 84%, 84%, 80% specificity for predicting the patients with right ventricular ejection fraction < 40%, respectively. A significant and powerful correlation was determined between the peak S velocities and dP/dt in 19 patients whose tricuspid regurgitation could be clearly recorded (r: 0.88, p < 0.0001). CONCLUSIONS: The analysis of tricuspid annular velocities obtained by tissue Doppler technique is a practical method of the assessment of right ventricular systolic functions.
Özet
Amaç: Sağ ventrikül sistolik fonksiyonlarının iki boyutlu (2D) ekokardiografi ile belirlenmesindeki güçlük nedeniyle noninvazif, pratik ve düşük maliyetli bir yönteme ihtiyaç vardır. Doku Doppler (DD) tekniği, örnekleme volümünün konulduğu dokuya ait sistolik ve diyastolik hızların spektral Doppler trasesinde görüntülenmesine olanak tanımaktadır. Bu çalışmada DD ile kaydedilen triküspit annulus hızlarının sağ ventrikül sistolik fonksiyonuyla ilişkisini araştırmayı amaçladık. Yöntem: Bu amaçla 38 hastada (23 dilate kardiyomiyopatili, 15 mitral darlıklı, tümü sinüs ritiminde) ve 15 sağlıklı gönüllüde PW Doppler örnekleme volümü triküspit annulusu-sağ ventrikül serbest duvarı bileşkesine konarak sistolik (S), erken diyastolik (E) ve geç diyastolik (A) dalgaları görüntülendi. S dalgası 'time velocity integral'leri (TVI), zirve hızı ve izovolümik kontraksiyon süreleri (IZKS) ile 2D ekokardiyografik 'hemieliptic shell' metoduyla hesaplanan sağ ventrikül ejeksiyon fraksiyonu (RVEF), triküspit regürjitan akımının zirve hızı ve bu akım trasesinden hesaplanan sağ ventrikül dP/dt değerleri karşılaştırıldı. Bulgular: RVEF ile S zirve hızı, S TVI ve IZKS arasında anlamlı bağıntı tespit edildi (sırasıyla r: 0.76, p