Figure 3: Bar chart comparing the c ircadian distribution of CoV between RVOT and LVOT cohorts. The 24 hour period is divided into quartiles. Mean CoV and standard deviations are shown. The greatest mean difference was seen between 06:00 and 12:00: RVOT vs LVOT 1.15 (± 0.55) vs 0.36 (± 0.15), mean difference 0.79, p <0.0001.