Cuantificación del tamaño del infarto del miocardio con cintigrafía SPECT y ecocardiografía

Debido a la importancia que posee la cuantificacion precisa del tamano del infarto miocardico (IM), se estudio la concordancia entre su tamano determinado mediante cintigrafia miocardica SPECT utilizando un programa de cuantificacion automatico independiente del operador y Ecocardiografia bidimensional, en 24 pacientes con antecedentes de IM antiguo (mas de 1 mes). Los IM se dividieron en 3 categorias: grandes, medianos y pequenos. Se obtuvo concordancia estadisticamente significativa, aunque de grado moderado, entre ambas tecnicas. Concluimos que el metodo cintigrafico asociado a este programa de cuantificacion automatico se compara bien a la Ecocardiografia, con la ventaja para el primero de ser operador independiente. Es posible que el grado de concordancia hubiese podido ser incluso mayor, si se hubiese usado en Ecocardiografia analisis con doppler tisular en forma sistematica. Due to the importance of an accurate quantification of the myocardial infarction size, we studied the agreement between its magnitude as determined by gated SPECT with an automatic quantification program and echocardiography, in 24 patients with history of old MI (more than 1 month). The myocardial infarctions were divided into 3 categories: great, medium and small. Statistically significant agreement was obtained, although of moderate degree, between both techniques. We conclude that the nuclear method associated to this program of automatic quantification is compared well to echocardiography, with the advantage for the first one of being independent operator. It is possible that the agreement degree could have been even better, if systematic analysis with tissue Doppler had been performed during echocardiography.