Composite data of the effect of PD-118057 (20 μM) to abbreviate effective refractory period (ERP) and differentially abbreviate action potential duration (APD) measured at 70 and 90% repolarization (APD70 and APD90) of pectinate muscle (PM) and crista terminalis (CT), thus increasing spatial dispersion of repolarization (SDR) in all 28 preparations. Reported ERP was recorded from PM region. * PD-118057 vs. respective control, p< 0.05
† vs. respective CT APD value, p< 0.05