Correlation between intracoronary thrombus components and coronary blood flow after percutaneous coronary intervention for acute myocardial infarction at different onset time

Table 1 Thrombus extraction in patients with percutaneous coronary intervention at different acute myocardial infarction onset time in non-ST-segment elevation myocardial infarction and ST-segment elevation myocardial infarction groups, n (%)

Groups	White thrombus	< 3 h	3–6 h	6–12 h
NSTEMI (38 cases)	Yes	3 (50.0)	12 (75.0)	13 (81.25)
	No	3 (50.0)	4 (25.0)	3 (18.75)
STEMI (116 cases)	Yes	1 (4.00)	1 (1.92)	2 (5.13)
	No	24 (96.0)	51 (98.08)	37 (94.87)
Fisher			37.662	29.418
P value		0.016	< 0.001	< 0.001

NSTEMI: Non-ST-segment elevation myocardial infarction; STEMI: ST-segment elevation myocardial infarction.

Table 2 Relationship between different thrombus properties and incidence of no-reflow and slow blood flow after percutaneous coronary intervention at different acute myocardial infarction onset time, n (%)

Subgroups	No reflow or slow blood flow	< 3 h	3-6 h	6-12 h
White thrombus (32 cases)	No	3 (75.0)	5 (38.46)	3 (20.0)
	Yes	1 (25.0)	8 (61.54)	12 (80.0)
Red thrombus (122 cases)	No	27 (100)	50 (90.91)	30 (75.0)
	Yes	0 (0)	5 (9.09)	10 (25.0)
Fisher			15.467	13.75
P value		0.143	< 0.001	< 0.001

Table 3 Relationship between acute myocardial infarction onset time and no reflow and slow blood flow during operation, n (%)

No reflow or slow blood flow	< 3 h	3-6 h	6-12 h	Chi-square	P value
Yes (36 cases)	1 (3.23)	13 (19.12)	22 (40.0)	16.201	< 0.001
No (121 cases)	30 (96.7)7	55 (80.88)	33 (60.0)