Figure 5.

Superposition of the transmembrane action potential trajectories of isolated guinea pig right atrial strips (n = 12) and right ventricular trabeculae (n = 13) (A) at a length of 0.95 L_max. Dependence of action potential duration at the level of amplitude repolarisation by 90% (APD90) of guinea pig right atrial strips and ventricular trabeculae on length (B). Data are presented as (A) mean ± 95% ci (confidence interval), (B) box-whisker plots (box—IQR (Q1–Q3), Q2 inside the box, whisker—min and max, points—values (scatter plot)). Temperature 35 °C, stimulation frequency 2 Hz. *—significant differences between RA and RV at the corresponding length (p < 0.05, Mann–Whitney U-test).