Fig. 1From: Prevalence of left ventricular diastolic dysfunction by cardiac magnetic resonance imaging in thalassemia major patients with normal left ventricular systolic functionCMR technique – two-dimensional phase contrast imaging at mitral annular plane. Region of interest was drawn from magnitude image (a), flow and peak velocity were calculated from phase image (b). Mitral velocity-time curve yielded E, A, and DT, which represented the time from peak of E wave to the point intersected by the downslope line drawn from peak of E wave. Left atrial (LA) volume was calculated by area-length method in two-chamber (c) and four-chamber (d) views. The LA area was contoured at the end systole, but the left atrial appendage and pulmonary veins were excluded. LA length was drawn from midpoint of the mitral annulus to the opposite LA wallBack to article page