Which of the following statements are not true?
A. Bioprosthetic valves have a relatively high incidence of hemolysis.
B. Bioprosthetic valves have a lower incidence of postoperative prosthetic valve endocarditis.
C. Mechanical valves develop structural failure after an average of 7 to 10 years.
D. Mortality attributable to warfarin therapy approaches 5% per patient-year.
Answer:A
Which of the following statements are not true?
A. Bioprosthetic valves have a relatively high incidence of hemolysis. B. Bioprosthetic valves have a lower incidence of postoperative prosthetic valve endocarditis. C. Mechanical valves develop structural failure after an average of 7 to 10 years. D. Mortality attributable to warfarin therapy approaches 5% per patient-year.