Clinical significance of prolonged chest pain in vasospastic angina

Table 3 Coronary angiography and spasm provocation test-related parameters

	Short-duration	Long-duration	P value	Low-frequency	High-frequency	P value
CAG
Atherosclerotic change (%)	73 (64)	34 (64)	0.9884	53 (60)	54 (68)	0.7747
Myocardial bridge (%)	11 (11)	5 (9)	0.9646	9 (10)	7 (9)	0.7645
SPT
Low dose of ACh (%)	26 (23)	20 (38)	0.0444	26 (30)	20 (25)	0.5414
Total occlusion (%)	7 (6)	10 (19)	0.0113	6 (7)	11 (14)	0.1295
Multivessel spasm (%)	63 (62)	30 (70)	0.3189	50 (62)	48 (68)	0.4500
(No.)	(n = 102)	(n = 50)		(n = 81)	(n = 71)
Focal/diffuse spasm	12/102	17/36	0.0006	15/73	14/65	0.9083
RCA spasm (%)	78 (68)	39 (74)	0.4977	61 (69)	56 (71)	0.8252
Unavoidable use of NTG (%)	25 (32)	23 (59)	0.0062	20 (34)	28 (49)	0.096
LAD spasm (%)	96 (94)	49 (98)	0.2833	75 (93)	70 (99)	0.0783
(No.)	(n = 102)	(n = 50)		(n = 81)	(n = 71)
Severe complications (%)	7 (6)	5 (9)	0.4430	5 (6)	7 (9)	0.4211

ACh: Acetylcholine; CAG: Coronary angiography; LAD: Left anterior descending coronary artery; No.: Number; NTG: Nitroglycerin; RCA: Right coronary artery; SPT: Spasm provocation test.