Figure 1. ECG and MAP recordings in Rgs5-/- and WT mice.

Two representative electrocardiograms recorded from telemetry ECG showed the measurements of Pdur and PR intervals (A). Compared with wild-type mice, Rgs5^−/− showed widened P wave, and the action potential duration (APD) prolonged in the atria of Rgs5^−/− from 50% (APD₅₀) to 90% (APD₉₀) (B,C). The effective refractory periods (ERP) also significantly increased during S₁ cycle length of PES at 150 ms, 125 ms and 100 ms.