Fig. 5From: Nonlinear analysis of beat-to-beat variability of action potential time series data identifies dynamic re-entrant substrates in a hypokalaemic mouse model of acquired long QT syndromeRepresentative Poincaré plots of APDn+1 against APDn with SD along the line-of-identity (SD1) and SD perpendicular to the line-of-identity (SD2) before (A) or after the application of experimental hypokalaemia (B) and hypokalaemia with 0.1 mM heptanol (C) (n = 7 hearts)Back to article page