TABLE 2.

Median (IQR) of Patient Measurements during Cardiac Catheterization

	Median (IQR)
Respiration rate (breaths/min)	20 (17, 20)
Heart rate (beats/min)	103 (87, 134)
${\text{SVO}}_2^{\text{SVC}}(\%)$	64 (62, 67)
${\text{SvO}}_2^{\text{NIRS}}(\%)$	59.6 (56.4, 65.9)
SNRHb	50.0 (16.5, 111.0)
SNRHbO2	25.5 (18.4, 51.8)

IQR, interquartile range; SNR_Hb, signal-to-noise ratio of the deoxyhemoglobin signal; SNR_HbO2, signal-to-noise ratio of the oxyhemoglobin signal; ${\text{SvO}}_2^{\text{NIRS}}$, venous saturation measured noninvasively with near-infrared spectroscopy; ${\text{SVO}}_2^{\text{SVC}}$, cerebral venous oxygen saturation from a superior vena cava blood sample.