Towards the Automated Analysis and Database Development of Defibrillator Data from Cardiac Arrest

Table 5

The variables in the original database which will be automatically replicated. The table is organized in columns to highlight the type of information the variables provide: time events, patient’s response, and device operation and therapy. Each variable is labeled according to it being a primary information object (PIO) or secondary information object (SIO). All the variables labeled as PIO can also be found in the table listing the PIO variables (Table 4). The remaining variables labeled as SIO can be automatically derived from the PIO variables (listed in table PIO) by designing proper reasoning algorithms.

Variable domain
Time events		Patient’s response		Device operation and therapy
First compression time	PIO	Initial rhythm	SIO	Shock number	SIO
Last compression time	PIO	Preshock rhythm	SIO	Number of shock seq. recorded	SIO
VF onset time	PIO	Rhythm 10 sec after last shock	SIO	Number of shocks in sequence	SIO
ROSC time	PIO	Rhythm 30 sec after last shock	SIO	Mode	SIO
Shock time	PIO	Rhythm 60 sec after last shock	SIO	EMS CPR prior to shock?	SIO
		Rhythm 120 sec after last shock	SIO	Impedance at 1st shock	SIO
ECG start time	SIO	VF prior to next shock?	SIO	Energy of 1st shock	SIO
		Org. rhythm prior to next shock?	SIO
		ROSC	SIO