Aims of study: Evaluation of the utility of transthoracic echocardiography in the management of low cardiac output syndrome of open-heart surgical patients Methods: Prospective study done in open-heart surgery patients in the intensive care unit of Heart Institute HCM city Results: There were 63 patients (26 males, 37 females) mean age 37 + 9, 7 in adult and 5, 3 + 4 in children, enrolled in the study.