Association of Hyperhomocysteinemia with Increased Coronary Microcirculatory Resistance and Poor Short-Term Prognosis of Patients with Acute Myocardial Infarction after Elective Percutaneous Coronary Intervention

Table 2

Comparison of coronary angiographic characteristics and IMR between the two groups.

		HHcy (n = 53)	Control (n = 48)		X^2 (t)
Culprit vessel number	1	31 (58.5%)	23 (47.9%)	0.287	1.132
	2	18 (34.0%)	21 (43.8%)	0.313	1.018
	3	4 (7.5%)	4 (8.3%)	0.884	0.021
TIMI flow grade	0	0	0	1
	1	0	0	1
	2	3 (5.7%)	2 (4.2%)	0.730	0.119
	3	50 (94.3%)	46 (95.8%)	0.730	0. 119
Culprit vessel	LMCA	1 (1.9%)	0 (0%)	0.339	0.915
	LAD	37 (67.9%)	32 (64.6%)	0.734	0.115
	Circumflex	6 (11.3%)	5 (10.4%)	0.884	0.021
	RCA	9 (17.0%)	11 (22.9%)	0.455	0.559
Side branch		25 (47.2%)	29 (60.4%)	0.183	1.777
IMR		38.28 ± 8.05	27.13 ± 4.83	0.000	8.336

HHcy: high homocysteine; TIMI: thrombolysis in myocardial infarction; LMCA: left main coronary artery; LAD: left anterior descending artery; RCA: right coronary artery; IMR: index of microvascular resistance.