a statistical trendp = 0.051
4.2 Cardiac conduction Comparison of cardiac conduction variables between OAT+ and APAP showed OAT+ significantly reduced the duration of the normal R-R interval (p = 0.025), pre-PAC R-R interval (p = 0.003), the PAC R-Post Systolic Pause-R interval (p < 0.001) and a statistical trend for reduction of the R-PAC R interval (p = 0.051), but increased the PAC P-R interval (p = 0.032) compared with APAP.