42 consecutive patients with infective endocarditis on native valves , according to pelletier and petersdorf 's criteria of definite ( 13 pts ) , probable ( 12 pts . ) and possible ( 17 pts ) endocarditis , were identified and prospectively followed-up with m-mode and two-dimensional echocardiography , since 1980 .
C0014121
infective endocarditis
C0014118
endocarditis