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handle: 10261/71757
[Introduction and objectives]: Characteristics of isolated right-sided endocarditis in patients without a pacemaker and who are not intravenous drug users (IVDU) are poorly understood. The aim of this study was to investigate the current frequency of this entity and describe its clinical, microbiological, echocardiographic and prognostic profile. [Methods]: We have prospectively analyzed 17 consecutive cases of isolated right-sided endocarditis in non-IVDU who did not have a pacemaker, out of a total of 583 consecutive episodes of endocarditis (2.9%). [Results]: Mean age was 38±15 years; 11 of the 17 patients were men. Almost half of the patients had at least one predisposing disease. An intravascular catheter was the most frequent port of entry (35%). The most common signs and symptoms on admission were fever, dyspnea, septic pulmonary embolisms, pleural effusion and right-sided heart failure. The most frequent microorganism was Staphylococcus aureus (41%). In most cases (82%) the infection was located in the tricuspid valve. Recurrent pulmonary embolisms were the most frequent complication and the main cause for surgery, which was needed in 5 patients (29%). Two patients died during hospitalization (12%), both from septic shock. During follow-up one patient died of unknown causes 1 month after discharge, and other relapsed 3 months after discharge. [Conclusions]: Isolated right-sided endocarditis should be included in the differential diagnosis of patients with febrile syndrome, respiratory symptoms and predisposing disease, even when they do not have a pacemaker and are not IVDU. The presence of intravascular catheters and Staphylococcus bacteriemia should heighten suspicion of endocarditis.
[Introducción y objetivos]: La endocarditis derecha aislada es una entidad poco conocida cuando afecta a pacientes no portadores de marcapasos y no adictos a drogas por vía parenteral (ADVP). Nuestro objetivo es estudiar la frecuencia actual de esta entidad y describir su perfil clínico, microbiológico, ecocardiográfico y pronóstico. [Métodos]: Hemos analizado 17 casos de endocarditis derecha aislada en pacientes no ADVP y no portadores de marcapasos, de un total de 583 episodios consecutivamente diagnosticados de endocarditis infecciosa (3%). [Resultados]: La media de edad fue 38 ± 15 años y 11 pacientes eran varones. El 47% de los pacientes presentaban alguna enfermedad predisponente. El catéter intravascular fue la puerta de entrada más frecuente (35%). Los síntomas y signos más comunes al ingreso fueron fiebre, disnea, embolia pulmonar séptica, derrame pleural e insuficiencia cardiaca derecha. El microorganismo más frecuente fue Staphylococcus aureus (41%). La mayoría de los casos asentaron en la válvula tricúspide (82%). La embolia pulmonar recurrente fue la complicación más frecuente y la principal causa de cirugía, que fue precisa en 5 (29%) casos. Fallecieron 2 (12%) pacientes, ambos por shock séptico. En el seguimiento, 1 paciente falleció al mes del alta por causa desconocida y 1 presentó una recaída al tercer mes. [Conclusiones]: La endocarditis derecha aislada debe incluirse en el diagnóstico diferencial de pacientes con síndrome febril, síntomas respiratorios y alguna enfermedad predisponente, aunque no sean portadores de marcapasos o ADVP. La presencia de catéteres intravasculares y la bacteriemia por estafilococos refuerzan la sospecha de endocarditis en estos pacientes.
Este estudio fue financiado en parte por la Red Cooperativa de Investigación Cardiovascular (RECAVA) del Instituto de Salud Carlos III y por una beca de la Sociedad Castellano-Leonesa de Cardiología (SOCALEC).
Tambien publicado en: http://dx.doi.org/10.1016/S0300-8932(08)75732-4 (Elsevier España (Elsevier Doyma).-- et al.
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