Table 2.

Changes in oxygen saturation, heart rate, and mean signal (reflecting stroke volume) over the course of imaging from the first 20 images used in the calculation of FDglobal (Start) to the last 20 images (End)

	PAH, n = 4		Controls, n = 7
	Start	End	Start	End	P (Group × Time)
$\mathrm{S}{\mathrm{p}}_{{\mathrm{O}}_2}$, %	95.0	95.4	97.9	97.4	0.16
±SD	2.4	3.1	1.8	1.7
Heart rate, beats/min	60	58	70	69	0.33
±SD	3	7	12	12
Mean signal, AU	15	18	22	24	0.85
±SD	5	5	4	4

FDglobal, global fluctuation dispersion; PAH, pulmonary arterial hypertension; $\mathrm{S}{\mathrm{p}}_{{\mathrm{O}}_2}$, oxygen saturation.