Key result
2D-STE-derived parameters, such as circumferential strain, better estimated elevated left ventricular filling pressure than the E/E(a) ratio in patients with IDC.
Why the study?
Do 2D-STE-derived parameters better estimate increased left ventricular filling pressure compared to the E/E(a) ratio in patients with idiopathic dilated cardiomyopathy?
Observational (n=51)
Do 2D-STE-derived parameters better estimate increased left ventricular filling pressure compared to the E/E(a) ratio in patients with idiopathic dilated cardiomyopathy?
2D speckle tracking echocardiography-derived parameters provide superior estimation of elevated left ventricular filling pressures compared to the traditional E/E(a) ratio in patients with idiopathic dilated cardiomyopathy.
Answers are grounded in this paper and cite their sources.
May support 2D-STE over E/E' for estimating filling pressures in IDC; hypothesis-generating and should not yet change practice.
AIMS: the ratio of early diastolic transmitral flow velocity (E) to early diastolic mitral annular velocity (E(a)) is frequently used to predict an increase in left ventricular filling pressure (LVFP). However, this approach has several limitations. The aim of this study was to test whether additional information is gained by new echocardiographic indexes utilizing strain and strain rate (SR) derived from 2-dimensional speckle tracking echocardiography (2D-STE) for the estimation of LVFP. METHODS AND RESULTS: fifty-one patients with idiopathic dilated cardiomyopathy (IDC) underwent pulsed-wave tissue Doppler echocardiography and 2D-STE performed simultaneously with right heart catheterization. Receiver operating characteristic analysis showed that circumferential strain and the SR during late diastolic LV filling (0.956 and 0.951, both P = 0.001), E/circumferential SR at early diastolic LV filling (0.949, P = 0.001), and E/circumferential strain at the time of peak E-wave (0.948, P = 0.001) had greater area under the curve than the E/E(a) ratio (0.911, P = 0.001) for the prediction of pulmonary capillary wedge pressure > 12 mmHg. CONCLUSION: when compared with the E/E(a) ratio, several 2D-STE-derived parameters better estimated the increase in LVFP in patients with IDC.
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Meluzı́n et al. (2010) conducted an observational in idiopathic dilated cardiomyopathy (n=51). 2-dimensional speckle tracking echocardiography (2D-STE) vs. E/E(a) ratio was evaluated on prediction of pulmonary capillary wedge pressure > 12 mmHg (p=0.001). 2D-STE-derived parameters, such as circumferential strain, better estimated elevated left ventricular filling pressure than the E/E(a) ratio in patients with IDC.
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