Journals / MN Kardiyoloji / 2008 / Cilt: 15 - Sayı: 2
Evaluation of right ventricular functions in patients with isolated rheumatic mitral stenosis by strain/strain rate imaging
- Journal
- MN Kardiyoloji
- Pages
- 96–102
- DOI
- —
Abstract
Aim: The aim of this study is the evaluation of right ventricular functions with tissue Doppler, strain (S) and strain rate (SR) imaging techniques in patients with isolatedmitral stenosis who have no right ventricular dysfunction with conventional echocardiography and clinically. Material and Method: 34 mitral valve stenosis patients (mitral valve area <2,0 cm²) (group I) and 29 healty subjects (group II) were included in the study. For all patients; in addition to conventional echocardiography, tissue Doppler imaging of base of the lateral wall of right ventricle and S/SR imaging of mid and basal segments of right ventricle were recorded and analysed. Results: Right atrial and right ventricular diameters and pulmonary artery pressure are significantly higher in group I (37,9±5,2 mm, 34,6±2,9 mm, p<0.05; 37,8±5,1 mm, 35,3±2,7 mm, p<0.05; 40±17,5 mmHg, 23±5,9mmHg, p<0.001, respectively). There is no statistically significant difference in respect of the right ventricular systolic myocardial velocity between two groups (10,1±1,8cm/s vs 11,1±2,1 cm/s p>0.05). S/SR rate values of the right ventricular lateral wall is significantly lower in group I than in group II (basal S: -19,75±2,7% vs -22,94±2,45%, p<0.0001; basal SR: -1,55±0,18/s vs -1,84±0,21/s p<0.001; mid S: -23,36±3,23% vs -27,64±2,34%, p<0.001; mid SR: -1,70±0,19/s vs -1,97±0,24/s, p<0.001). Conclusion: S/SR imaging is a novel echocardiographic imaging method and it is more effective and sensivite than tissue Doppler imaging. S/SR echocardiography may be used as an alternative method for the evaluation of early subclinic right ventricular dysfunction in patients with mitral stenosis who have no clinic and echocardiographic findings for right ventricular failure.
Özet
Amaç: Bu çalışmanın amacı klinik ve konvansiyonel ekokardiyografide sağ ventrikül disfonksiyon bulguları olmayan hastalarda sağ ventrikül fonksiyonlarının doku Doppler, strain (S) ve strain rate (SR) görüntüleme tekniği ile değerlendirilmesidir. Gereç ve Yöntem: Çalışmamıza 34 izole mitral darlığı olan (mitral kapak alanı 0.05). Sağ ventrikül lateral duvarından alınan S/SR değerleri grup I’de, grup II’den anlamlı olarak düşüktü (bazal S: -19,75±2,7% vs -22,94±2,45%, p<0.0001; bazal SR: -1,55±0,18/s vs -1,84±0,21/s p<0.001; mid S: -23,36±3,23% vs -27,64±2,34%, p<0.001; mid SR: -1,70±0,19/s vs -1,97±0,24/s, p<0.001). Sonuçlar: S/SR rate görüntüleme yeni ekokardiyografik yöntemler olup, doku Doppler’den daha duyarlı ve etkin parametrelerdir. Klinik ve ekokardiyografk olarak sağ ventrikül yetmezlik bulguları olmayan mitral darlıklı hastalarda erken dönemde subklinik sağ ventrikül disfonksiyonunu değerlendirmede S/SR ekokardiyografi alternatif bir yöntem olarak kullanılabilir.