Table 2. Protocol A: Hemodynamic Parameters and Return of Spontaneous Circulation (ROSC).

Mean ± SD. All pressures in mmHg and carotid blood flow in ml/min.

		Base line	2 min STD	5 min STD+SNP	7 min ACD+ITD	10 min ACD+ITD+SNP	12 min ACD+ITD+AB	15 min ACD+ITD+AB+SNP	No of shocks to ROSC	ROSC to 60m
SNP CPR	SBP	118±14	52±6	49±12	66±14^*	70±16^†^*	91±18^*	85±17^†^*	1±0.5^†	7/7 (100%)^†
	DBP	85±15	18±4	19.6±2	26±6	28±9^†^*	40±10^*	38.8±9^†^*
	RA	2±1	6±2	5±2	4±3	4±2	12±6^*	9±6
	CPP	83±15	12±3	16±2	24±5^*	26±6^†^*	29±7^*	28.5±7^†^*
	CerPP	81±16	13±5	14±2	18±8^*	18±8^†^*	25±9^*	23±7^†^*
	ICP	18±2	21.5±3	21±4	23±4	23±5	33.5±8^*	33±6^†
	CBF	403±70	141±50^*	127±32^*	164±70^*	200±81^*	270±132^*	365±141^*^†
S-CPR		Base line		5 min S-CPR		10 min S-CPR		15 min S-CPR
	SBP	100±20		52±6		42±8		38±8	4±3	2/8 (25%)
	DBP	78±12		20±3		16±5		16±2
	RA	2±2		3±2		2±2		4±3
	CPP	76±11		17±3		14±3		12±3
	CerPP	66±6		14±4		9±2		7±2
	ICP	15±3		21±3		20±3		20±3
	CBF	389±82		144±45		123±52		102±42

means p<0.05 within the same group;

^†

means p<0.05 between groups.

SBP: systolic blood pressure; DBP: diastolic blood pressure; RAP: right atrial pressure; CPP: coronary perfusion pressure; CerPP: cerebral perfusion pressure; ICP: intracranial pressure: CBF: carotid blood flow. STD: Standard CPR; SNP: sodium nitroprusside; ACD: active compression decompression CPR; ITD: inspiratory impedance threshold device; AB: abdominal binding.