Prosthetic Aortic Valve Stenosis in End-Stage Renal Failure

Table 1

Summary data of serial echocardiography and serum calcium and phosphate concentration.

Test Date	Transthoracic echocardiogram			Calcium-phosphate
	Aortic valve area (cm^2)	Transvalvular gradient (mmHg)	Velocity (m/sec)	Product (calcium × phosphate) (mg/dL)
Sept. 2002	0.73	56	4.7
Oct. 2002	1st aortic valve replacement operation			35.7 (9.4×3.8)
Oct. 2004	1.78	22	3.6
Oct. 2006	*	17	2.8
July 2007	1.87	19	3.0
April 2008	1.74	16	2.7
May 2008	Commencement of dialysis			64.8 (7.9×8.2)
March 2010	0.88	40	4.3
April 2010	*	49	4.3	53.9 (9.3×5.8)
Sept. 2010	0.73	74	5.1	51.9 (9.1×5.7)
Oct. 2010	2nd aortic valve replacement operation			47.2 (8.9×5.3)
Nov. 2010	2.08	21

*: Unavailable (missing data).