[Infective endocarditis in an internal medicine ward].
BACKGROUND
Due to the increasing number of intravenous drug users, subjects with immune deficiencies or with prosthetic valves, infective endocarditis (IE) continues to be prevalent and to have a high mortality.


OBJECTIVE
To review all cases of infective endocarditis diagnosed in an Internal Medicine Service.


METHODS
Retrospective review of medical records of all patients with infective endocarditis, hospitalized in an Internal Medicine ward, between 1989 and 2003. Dukes criteria were used to define definitive, possible and less probable cases of IE.


RESULTS
Eighty seven patients with definite IE were identified (66 males, age range 19-84 years), with a mean incidence of 5.3 per 1000 hospitalizations. IE in intravenous drugs users was usually caused by Staphylococcus aureus and presented high risk of embolism (RR: 3,21). Subjects aged over 70 years had a relative risk of mortality of 5.5. Hospital acquired IE was associated with advanced age and IV catheters appeared as the only predisposing factor. Patients with prosthetic valves were also older, their main complication was abscess formation and their mortality was higher.


CONCLUSIONS
A closer approach to differential conditions of patients, according to age, intravenous drug use or the presence of prosthetic valves, is necessary.
Hermida Ameijeiras
Alvaro
A
Servicio de Medicina Interna, Hospital Clínico, Santiago de Compostela (A Coruña), España. alvarohermida@tiscali.es
López Rodríguez
Raimundo
R
Rodríguez Framil
Montserrat
M
Lado Lado
Francisco
F
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D003428:Cross Infection / Q000453:epidemiology / Q000382:microbiology; D004697:Endocarditis, Bacterial / Q000453:epidemiology* / Q000382:microbiology; D005260:Female; D006349:Heart Valve Diseases / Q000453:epidemiology / Q000382:microbiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D016459:Prosthesis-Related Infections / Q000453:epidemiology / Q000382:microbiology; D012189:Retrospective Studies; D012307:Risk Factors; D013030:Spain / Q000453:epidemiology; D013203:Staphylococcal Infections / Q000150:complications / Q000453:epidemiology*; D013211:Staphylococcus aureus; D013290:Streptococcal Infections / Q000150:complications / Q000453:epidemiology*; D015819:Substance Abuse, Intravenous / Q000150:complications* / Q000453:epidemiology; D013923:Thromboembolism / Q000453:epidemiology / Q000382:microbiology; D034363:Viridans Streptococci