Fibrilación auricular: enfoque para el médico no cardiólogo / Atrial fibrillation: non cardiologist physicians approach

RESUMEN La fibrilación auricular es la arritmia más frecuente. Su clasificación según el patrón y tipo clínico permiten decidir el tratamiento a emplear que debe incluir control de síntomas y prevención de cardioembolismo. La elección del tratamiento depende de la presencia de fenómenos desencadenantes de la arritmia, factores de riesgo para tromboembolismo, factores de riesgo para sangrado, función cardiaca, funcionalidad del paciente, costo efectividad de los medicamentos y facilidades para acceder al sistema de salud. El anticoagulante a usar deberá elegirse con base en el tipo de fibrilación auricular y la presencia de contraindicaciones, documentación de anticoagulación inefectiva o alto riesgo de falla al tratamiento con warfarina. En presencia de contraindicaciones para la anticoagulación esta puede emplearse en pacientes con alto riesgo de sangrado cuando los factores de riesgo son controlables o corregibles, pudiéndose ofrecer como alternativa la oclusión de la orejuela auricular en pacientes que persisten con alto riesgo de sangrado.

SUMMARY Atrial fibrillation is the most frequent arrhythmia. Its classification according to pattern and clinical type allows to decide the therapeutic strategy to use, that most include control of symptoms and prevention of cardioembolic events. The election of the treatment depends on the presence of triggering events, risk factors for thromboembolism, risk factors for bleeding, cardiac function, patient funcionality, medication costo efectiveness and health care access. The type of anticoagulant has to be supported on the type of atrial fibrillation and the presence of contraindications, documented ineffective anticoagulation or high risk of failure to warfarin. In case of contraindications for anticoagulation this could still be used in high bleeding risk patients, when risk factors are controllable or corrected; leaving left atrial appendage closure as an option for patients that remain in high risk for bleeding events.

Prevalence of Trypanosoma cruzi and Leishmania chagasi infection and risk factors in a Colombian indigenous population

This study was carried out in order to obtain base-line data concerning the epidemiology of American Visceral Leishmaniasis and Chagas's Disease in an indigenous population with whom the government is starting a dwelling improvement programme. Information was collected from 242 dwellings (1,440 people), by means of house to house interviews about socio-economic and environmental factors associated with Leishmania chagasi and Trypanosoma cruzi transmission risk. A leishmanin skin test was applied to 385 people and 454 blood samples were collected on filter paper in order to detect L. chagasi antibodies by ELISA and IFAT and T. cruzi antibodies by ELISA. T. cruzi seroprevalence was 8.7 percent by ELISA, L. chagasi was 4.6 percent and 5.1 pecent by IFAT and ELISA, respectively. ELISA sensitivity and specificity for L. chagasi antibodies were 57 percent and 97.5 percent respectively, as compared to the IFAT. Leishmanin skin test positivity was 19 percent. L. chagasi infection prevalence, being defined as a positive result in the three-immunodiagnostic tests, was 17.1 percent. Additionally, 2.7 percent of the population studied was positive to both L. chagasi and T. cruzi, showing a possible cross-reaction. L. chagasi and T. cruzi seropositivity increased with age, while no association with gender was observed. Age (p<0.007), number of inhabitants (p<0.05), floor material (p<0.03) and recognition of vector (p<0.01) were associated with T. cruzi infection, whilst age ( p<0.007) and dwelling improvement (p<0.02) were associated with L. chagasi infection. It is necessary to evaluate the long-term impact of the dwelling improvement programme on these parasitic infections in this community