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[en] Stress echocardiography in low-dose dobutamine is part of the proposed techniques for the identification of viable myocardium. Unlike isotopic techniques that analyze the viability in terms of perfusion and membrane integrity, the echo dobutamine studying the functional aspect of sustain ability is - to - say the existence of a reservation contraction in segments asynergic. To establish the diagnostic value of echo dobutamine in search of sustain ability we conducted a prospective study to nearly 85 patients all presented with a recent myocardial infarction whose average age is 55 years and the sex ratio is 0.95. The examination was performed for all our patients on average twelfth day of myocardial infarction, improved segmental kinetics at least one grade in at least two adjacent segments relative to the ground state is considered as ultrasound test of the viability.