Figure 1.

(a) Four-chamber left atrial strains (LASs). (b) Four-chamber LAS rates (LASRs). The white dotted line represents the mean value of the tracked LA segments. Reservoir (r), conduit (e), and contractile (a) strains are represented by color-coded arrows (yellow, pink, and blue, respectively). Measurements were averaged over 4- and 2-chamber views. In this patient, reservoir, conduit, and contractile strains and strain rates were 41.1%, −25.6%, and −15.5%, and 1.68 s⁻¹, −2.0 s⁻¹, and −2.2 s⁻¹, respectively.