Eco sem dor mas com memória: Post-systolic shortening

Assessment of Myocardial Ischemic Memory Using Speckle Tracking Echocardiography
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J Am Coll Cardiol Img, 2012; 5:1-11
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Myocardial ischemic memory imaging, denoting the visualization of abnormalities provoked by ischemia and sustained even after restoration of perfusion, can convey important clinical information. We previously reported that post-systolic shortening (PSS) remains in the risk area after recovery from brief ischemia
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Results: Peak systolic strain, end-systolic strain, and peak systolic strain rate decreased in the risk area during occlusion but recovered to the baseline level immediately after reperfusion. Strain rate during early diastole decreased during occlusion; however, the decrease did not persist after reperfusion. Post-systolic strain index (PSI) and time-to-peak strain index, which are parameters of PSS, increased during occlusion. These increases persisted until 10 to 20 min after reperfusion (circumferential PSI: 0.02 ± 0.04 [baseline] vs. 0.08 ± 0.04 [20 min], p < 0.05). SI-DI did not show a significant change during occlusion because of a large variation. Conclusions: Although abnormalities of PSS-related parameters alone persisted after recovery from 2-min occlusion, abnormalities of other deformation parameters, such as strain rate during early diastole, did not. These data suggest that assessment of PSS by speckle tracking echocardiography is useful for detecting myocardial ischemic memory. . . . ....................................................................................................................................................................................... O ecocardiograma em vigência de dor precordial é imbatível na sensibilidade, rapidez e custo.
Mas sem dor, o uso era restrito.
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Estudo experimental constrói as bases para uso do STRAIN na avaliação de pacientes com dor precordial que se apresentem após a resolução da dor.
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