Strain and strain rate imaging in evaluating left atrial appendage function by transesophageal echocardiography
Echocardiography, cilt.24, sa.8, ss.823-829, 2007 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 24 Sayı: 8
- Basım Tarihi: 2007
- Doi Numarası: 10.1111/j.1540-8175.2007.00469.x
- Dergi Adı: Echocardiography
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.823-829
- Anahtar Kelimeler: left atrial appendage function, strain-strain rate, transesophageal echocardiography
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Background: This study was planned to assess whether strain rate (Sr) and strain (S) echocardiography is a useful method for functional assessment of the left atrial appendage (LAA). Material and Methods: Fifty-seven consecutive patients underwent a clinically indicated study. LAA late empty velocity (LAAEV) was calculated as a gold standard for left atrial appendage function. Real-time 2-dimensional color Doppler myocardial imaging data were recorded from the LAA at a high frame rate. Analysis was performed for LAA longitudinal strain rate and strain from midsegment of lateral wall of LAA. LAA strain determines regional lengthening expressed as a positive value or shortening expressed as a negative value. Peak systolic values were calculated from the extracted curve. Results: Spearman correlation test results showed a statistically significant positive correlation was between the S, Sr variables and LAAEV (LAAEV vs S; r = 0.886, P < 0.001; LAAEV vs Sr: r = 0.897, P < 0.001, respectively). Strain and strain rate values were also significantly lower in patients with spontaneous echocardiographic contrast when compared with those without (strain; 2.42 ± 0.98 vs 13.1 ± 5.9, P < 0.001 and strain rate: 0.97 ± 0.54 vs 3.34 ± 1.15, P < 0.001, respectively). In addition, LAA strain and strain rate values were significantly lower in the patients with LAA thrombus (strain; 2.15 ± 0.96 vs 8.35 ± 6.9, P < 0.001, strain rate; 0.79 ± 0.46 vs 2.30 ± 1.48, P < 0.001, respectively). Conclusion: S and Sr imaging can be considered a robust technique for the assessment of the LAA systolic deformation. © 2007, the Authors.