TNNI3 and acute coronary syndrome: Myocardial perfusion echocardiography has been recently suggested the for differential diagnosis with acute coronary syndromes, which has revealed, in a patient with septic shock secondary to pneumonia with ECG changes, cTnI rise and disturbance of segmentary contractility, normal perfusion in areas of both normal and anormal contractility, suggesting that the cardiac presentation that was more likely to be a SIMD.