Table 3. Physiologic measurements.

Physiologic measurement	Immediately after index procedure	Follow-up</p>	p-value
Pdrest during wedge	41.1±13.5	20.1±9.7	<0.01
Parest during wedge	95.5±14.1	92±13.6	0.28
Pd/Parest during wedge	0.44±0.13	0.21±0.09	<0.01
Pdhyperaemia during wedge	34.4±11.3	21.5±8.5	<0.01
Pahyperaemia during wedge	90.4±15	92.9±14.8	<0.01
Pd/Pahyperaemia during wedge	0.38±0.11	0.23±0.09	<0.01
FFRcoll during occlusion	0.34±0.11	0.19±0.09	<0.01
(Pw−Pv)/(Pa−Pv) at rest	0.40±0.14	0.17±0.09	<0.01
FFRmyo	0.86±0.11	0.88±0.08	0.06
FFRcor	0.76±0.17	0.84±0.1	<0.01
FFRcoll	0.08±0.11	0.05±0.02	<0.01
Qmax	210±87	255±99	<0.01
Qcor	155±82	215±82	<0.01
Qcoll during occlusion (ml/min)	55±32	38±24	<0.01
Qcoll (ml/min)	14±10	7±5	<0.01
Values represent mean±SD. FFRcoll: fractional flow reserve collateral; FFRcor: fractional flow reserve coronary artery; FFRmyo: fractional flow reserve myocardium; Pa: aortic pressure; Pd: diastolic pressure; Pv: central venous pressure; Pw: wedge pressure. Qcoll during occlusion is the maximal recruitable blood flow over the collateral directly after PCI with an inflated balloon in the just-placed stent. Qcoll is the actual blood flow over the collateral directly after PCI in the open vessel.