Table 2.

Comparison of coronary sinus blood flow and coronary flow reserve

	All patients N = 309	Patients without MACE N = 267	Patients with MACE N = 42	*P-value
CSBF at rest (mL/min)	91.8 ± 37.6	87.2 ± 33.5	121.2 ± 47.9	< 0.001
CSBF during ATP infusion (mL/min)	234.4 ± 81.1**	230.3 ± 80.8**	237.8 ± 83.9**	0.58
ΔCSBF (mL/min)	139.5 ± 66.5	143.1 ± 67.7	116.5 ± 52.6	0.016
Coronary flow reserve	2.7 ± 0.9	2.8 ± 0.9	2.0 ± 0.4	< 0.001
Coronary flow reserve < 2.0	55 (17%)	30 (11%)	25 (60%)	< 0.001

Data are expressed as mean ± standard deviation or number (%)

* P-values represent the difference between patients with and without MACE. ** P < 0.05 vs. CSBF at rest

ΔCSBF = CSBF during ATP infusion – CSBF at rest

Coronary flow reserve = CSBF during ATP infusion / CSBF at rest × 100

ATP adenosine triphosphate, CSBF coronary sinus blood flow, MACE major adverse cardiac events