Preventive Effect of Albumin Nano TPA Gene Plasmid Ultrasound Microbubble Carrier System on Thrombosis after Cardiac Valve Replacement

Table 2

D-dimer before and 4 weeks after targeted tPA gene transfer and tPA content (μg/L, X ± s).

Grouping		D-dimer	TPA content
Control group	Preoperative	78.36 ± 6.12	0.19 ± 0.08
	After operation	80.50 ± 3.35	0.18 ± 0.03
Experience group	Preoperative	79.22 ± 4.56	0.17 ± 0.05
	After operation	856.78 ± 100.20	0.67 ± 0.11