focus assessed transthoracic echocardiography focus assessed transthoracic echocardiography focus assessed transthoracic echocardiography (or fate) is a type of transthoracic echocardiogram, or sonogram of the heart, often performed by non-cardiologist. the protocol has been used since 1989 and has four projections; subcostal four-chamber, apical four-chamber, parasternal long axis and parasternal short axis. focus assessed transthoracic echocardiographypurposetype of transthoracic echocardiogram, the original focused cardiac ultrasound protocol for non-cardiologists was devised by dr erik sloth in 1989 and has formed the basis of hands-on fate courses ever since. the success of the original protocol has inspired a surge of replicas in many shapes and the coining of many imaginative acronyms: feer, feel, focus, bleep, hart, fuse etc. these are all variations of the original theme . gallery subcostal four chamber apical four chamber parasternal long axis parasternal short axis each figure contains a tte with a black background, and a corresponding colored illustration.patrick j. lynch and c. carl jaffe, yale university, 2006. click on a figure to enlarge it and see some parts of the heart identified. rv, right ventricle; lv, left ventricle; ra, right atrium; la, left atrium; tv, tricuspid valve; mv, mitral valve; av, aortic valve; rvot, right ventricular outflow tract; lvot, left ventricular outflow tract