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- Title
Disagreement between tissue Doppler imaging and conventional pulsed wave Doppler in the measurement of myocardial performance index
- Authors
Rojo, Eduardo Casas; Rodrigo, José Luis; Pérez de Isla, Leopoldo; Almería, Carlos; Gonzalo, Nieves; Aubele, Adalía; Cinza, Rafael; Zamorano, José; Macaya, Carlos
- Abstract
Abstract: Aim: Myocardial performance index (MPI) is usually measured with pulsed wave Doppler (PWD). Our aim was to assess the degree of agreement between PWD and a method based on tissue Doppler imaging (TDI). Methods and results: Seventy-five patients with prior myocardial infarction and 20 healthy subjects underwent measurement of time intervals and MPI with PWD and pulsed TDI at septal and lateral sides of mitral annulus. MPI and TDI-MPI at septal side showed the best intraclass correlation coefficient (ICC=0.54; p <0.0005). Ninety-five percent interval of agreement ranged from −0.27 to 0.22. These differences were attributed to discrepancies in isovolumic contraction and relaxation times. In the healthy group the results were similar (ICC=0.44), although the 95% interval of agreement was lower (from −0.13 to 0.12). Conclusions: The agreement between PWD and TDI in the measurement of MPI is only moderate. This should be taken into account in the interpretation of studies in which TDI is used for this measurement.
- Subjects
MYOCARDIAL infarction; CARDIAC contraction; HEART diseases; INFARCTION; CARDIOLOGY
- Publication
European Journal of Echocardiography, 2006, Vol 7, Issue 5, p356
- ISSN
1525-2167
- Publication type
Article
- DOI
10.1016/j.euje.2005.08.004