Does the intracoronary pressure differ according to two types (diffuse or focal) of coronary spasm?

Table 4 Lesional characteristics in the diffuse and focal spasms

	Diffuse spasm	Focal spasm	P value
No.	100	34
ST elevation on ECG during SPT	6 (6)	13 (35)	< 0.01
Total or subtotal occlusion on CAG	9 (9)	9 (26)	0.02
Spastic vessels: RCA/LAD	46/54	13/21	0.43
Spasm site
Proximal/Mid/Distal	12/57/31	5/16/13	0.58
Dose of ACh at spasm provocation
Low (%)/Moderate (%)/High (%)	32 (32)/65 (65)/3 (3)	13 (38)/16 (47)/5 (15)	0.03
Intracoronary pressure indexes
Baseline Pd/Pa	0.96 ± 0.05	0.95 ± 0.05	0.35
Minimal Pd/Pa	0.77 ± 0.11	0.66 ± 0.20	< 0.01
ΔPd/Pa	- 0.19 ± 0.11	- 0.29 ± 0.20	< 0.01
iFR (n)	0.96 ± 0.07 (n = 52)	0.95 ± 0.08 (n = 17)	0.83
FFR (n)	0.85 ± 0.08 (n = 26)	0.80 ± 0.10 (n = 8)	0.18

ACh: Acetylcholine; CAG: Coronary angiography; ECG: Electrocardiogram; FFR: Fractional flow reserve; iFR: Instantaneous free-wave ratio; LAD: Left anterior descending coronary artery; No.: Number; Pd: Distal pressure; Pa: Aortic pressure; RCA: Right coronary artery; SPT: Spasm provocation test.