Fig. 2

Strain–volume loops and the linear fitting curves of individual examples from a healthy subject, a CRT responder and a non-responder at baseline and follow-up. (a) Global strain–Global volume loop; (b) Segmental (Midseptal and Midlateral) strain–Global volume loop; (c) Midseptal strain–Midseptal volume loop and Midlateral strain–Midlateral volume loop