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Evaluation of right ventricular function by using tissue Doppler imaging in patients after repair of tetralogy of fallot

, : Evaluation of right ventricular function by using tissue Doppler imaging in patients after repair of tetralogy of fallot. Echocardiography 26(8): 950-957

The aim of this study was to assess the relation between plasma B-type natriuretic peptide (BNP) levels and right ventricular function evaluated by tissue Doppler imaging (TDI) in patients after repair of tetralogy of Fallot (ToF). Twenty-five patients with a mean age of 14.1 +/- 4.4 years who underwent repair of ToF at a mean age of 4.9 +/- 5.1 years enrolled in this study. The control group consisted of 29 healthy children at a mean age of 13.1 +/- 2.8 years. The right ventricle and pulmonary regurgitation (PR) were assessed by two-dimensional echocardiography and color Doppler. Blood samples for BNP levels were taken and TDI was performed at rest. Plasma BNP levels were significantly higher in patients than in controls (28.3 +/- 24.1 vs. 7.4 +/- 2.3 pg/mL, P = 0.0001). The myocardial performance index (MPI) (1.08 +/- 0.35 vs. 0.58 +/- 0.11, P = 0.0001) was higher and isovolumic acceleration (IVA) (3.1 +/- 0.7 vs. 5.4 +/- 1.0 m/s(2), P = 0.0001) was lower in patients. The correlations were also significant between the degree of PR and MPI (r = 0.7, P = 0.0001) and also IVA (r =-0.7, P = 0.0001). The correlations were also significant between the BNP level and MPI (r = 0.6, P = 0.0001), IVA (r =-0.4, P = 0.002) and the degree of PR (r = 0.6, P = 0.0001). As a result, plasma BNP level increases in patients with ToF and both MPI and IVA from the right ventricular basal segments might be used to assess the right ventricular function.


PMID: 19558520

DOI: 10.1111/j.1540-8175.2009.00918.x

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