Table 1.

PRISM III Sampling Intervals for Cardiac Patients Receiving an Intervention. The admission time interval refers the period of the 2 hours prior to admission to 4 hours after admission for laboratory data and the first 4 hours of PICU care for other physiological variables. The post-intervention time interval refers to the first 4 hours of PICU care after a cardiac intervention (surgery or interventional catheterization, but not diagnostic catheterization).

Age at Admission	ICU length of stay prior to Cardiac Intervention	PRISM III Collection Time Interval
< 24 hours	≤12 hours	Admission
	12 hours – 10 days	Post-Intervention
24 hours to 10 days	0–10 days	Post-Intervention
	> 10 days	Admission
11 days to 30days	≤48 hours	Post-Intervention
	> 48 hours	Admission
31 days to 90 days	≤48 hours	Post-Intervention if cardiac surgery Admission if cardiac catheterization
	> 48 hours	Admission
> 90 days	All	Admission