Correlação e concordância entre medidas ecocardiográficas obtidas durante o exame no ecocardiógrafo com medidas de imagens digitalizadas: estudo transversal

Abstract

M a i l i n g A d d r e s s :I r a n C a s t r o • R u a D i s n a r d , 4 2 -9 0 8 5 0 -0 3 0 -P o r t o A l e g r e , R S -B r a z i l E-mail: iran.castro@cardiologia.org. OBJECTIVETo evaluate the correlation and concordance between the measurements of echocardiographic analysis of cardiac dimensions obtained through the Echo off-line applicative (software for obtaining digitized image measurements in a dedicated workstation) available to public domain, and those obtained through the conventional method. METHODTransversal contemporary study, of 56 randomized patients whose images were obtained during examinations. The measurements of the M mode and 2D, were done in the ventricles, left atrium, and aorta by the Echo off-line program. These measurements were compared to those obtained by another professional, through Pearson's correlation test (r) (alpha = 0.05) and by concordance analysis (Bland and Altman). RESULTThe measurements carried out by the Echo off-line system showed (r) that varied from 0.85 to 0.98. The analysis of concordance showed that for most measurements, the mean difference between the methods was approximately zero. The variation of absolute values did not show, in average, a clinical signifi cance. The Echo off-line applicative allows a reduction of approximately 30% in the time spent to obtain the measurements. CONCLUSIONThis study demonstrated the accuracy of the Echo off-line program to measure cardiac dimensions in a dedicated workstation, showing that it can be routinely used in echocardiography labs. KEY WORDSInterpretation of image guided by computer, echocardiography, public domain program.