Effect of bivalirudin on myocardial microcirculation and adverse events after interventional therapy in older patients with acute coronary syndrome

Table 3 Comparison of cardiac function indices

Groups	n	LVEF in %		CK-MB in U/L		NYHA points
		Pre-intervention	Post-intervention	Pre-intervention	Post-intervention	Pre-intervention	Post-intervention
Observation group	85	41.57 ± 3.46	59.18 ± 4.35	114.36 ± 14.32	48.06 ± 4.37	2.86 ± 0.53	1.75 ± 0.42
Control group	80	41.78 ± 3.21	51.24 ± 3.87	112.93 ± 14.84	54.75 ± 5.11	2.83 ± 0.50	2.01 ± 0.53
t value	-	0.403	12.359	0.630	9.055	0.373	3.503
P value	-	0.687	< 0.001	0.530	< 0.001	0.709	0.001

Data are mean ± standard deviation. Observation group: Patients treated with bivalirudin; Control group: Patients treated with unfractionated heparin. CK-MB: Phosphocreatine kinase isoenzyme; LVEF: Left ventricular ejection fraction; NYHA: New York Heart Association.