O valor do Strain no Ecoestresse.

 

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In a study of 2D strain imaging, a peak systolic longitudinal SR of −0.83 s−1 and an early diastolic SR of 0.96 s−1 predicted significant (>70%) stenosis with a sensitivity and specificity of 85% and 64% and 77% and 93%, respectively,26 suggesting the potential for early diastolic deformation to improve diagnostic accuracy. In another study of 108 patents undergoing coronary angiography, a 2D longitudinal strain of −17.9% discriminated severe 3-vessel or left main disease from lesser coronary artery disease with a sensitivity and specificity of 79% and 79%, respectively.27 Finally, in a cohort of patients with normal ejection fraction at increased atherosclerotic risk and/or with stable chest pain, a progressive impairment of 2D global strain and SR (the former with lower variability and higher reproducibility than the latter) was directly related to increasing severity of coronary disease as determined from multislice computed tomography. A global longitudinal strain (the average of segmental longitudinal strains) ≥17.4% provided high sensitivity and specificity (83% and 77%, respectively) in identifying patients with obstructive coronary disease.

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O ponto continua sendo, por que alguém nos anos 80 e usando um aparelho primitivo  acertava os mesmos 85% no ecoestresse?

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