Table 2.

Normal parameters of mechanical prosthesis within follow-up points

Parameters	First Follow-up (1 week)	Second Follow-up (4 week)	P-value
	N = 108	N = 69
Peak Pressure Gradient	18.51 (17.14–19.88)	19.07 (16.49–22.01)	0.717
Mean Pressure Gradient	10.88 (9.85–11.97)	11.52 (9.89–13.41)	0. 526
Peak Velocity	1.97 (1.89–2.05)	2.02 (1.89–2.14)	0.629
Pulmonary velocity acceleration time	87.35 (84.49–89.97)	95.97 (89.82–102.37)	0.038
Doppler velocity index	0.67 (0.57–0.64)	0.56 (0.52–0.61)	0.229
Effective Orifice Area	2.98 (2.80–3.16)	2.79 (2.57–2.98)	0.397
Effective Orifice Area /Body surface area	1.81 (1.68–1.91)	1.72 (1.56–1.86)	0.559

Data represented as mean and 95%confidence interval