Fig. 6

Left atrial measurements by tissue-tracking CMR in asymptomatic individuals. LA volume, LA strain, LA strain rate, and LV volume in a asymptomatic participant free of cardiovascular daises as a control (block line) and a MESA participant who developed CHF (orange line). A case of CHF had a relatively greater LA volumes with impaired LA strains (S max and S preA) and LA strain rates (SRs, SRe, and SRa) than a control. Volumes are index to body surface area. LA function was analyzed by using a tissue-tracking method with semiauto mated software (multimodality tissue tracking [MTT] version 5.0; Toshiba, Tochigi, Japan). CHF; congestive heart failure; LA = left atrial; LV = left ventricular; S max = maximum strain; S preA = pre atrial contraction strain; SRa = strain rate at atrial contraction; SRe = strain rate at LV early diastole; SRs = maximum strain rate, V max = maximum indexed volume; V min = minimum indexed volume; V pre A = pre-atrial contraction indexed volume