Evaluation of the NNECDSG Score in a Brazilian public hospital.

OBJECTIVE: To compare the observed incidence of mediastinitis and strokes versus the expected incidence according to the NNECDSG score (Northern New England Cardiovascular Disease Study Group) in a population submitted to coronary artery bypass graft surgery. METHODS: A retrospective consultation was made of medical records of all patients submitted to isolated CABG from January 1st, 2000 to December 31st, 2004, at the Cardiac Surgery Service of the Triângulo Mineiro Federal University (UFTM). Data regarding the incidences of observed mediastinitis and strokes and those estimated by the NNECDSG score were submitted to the Kolmogorov-Smirnov normality test. A comparison was achieved using the paired Student t test, with the level of significance determined as p=0.05. RESULTS: A group of 230 patients were analyzed, including 144 (62.60%) men and 86 (37.39%) women. Sixty-one (26.52%) presented with diabetes, 30 (13.04%) with chronic obstructive pulmonary disease (COPD) and 23 (10%) had peripheral vascular disease (PVD). Emergency surgery occurred in 34 (14.78 %) cases. In 37 (16.08%) patients an ejection fraction (EF) of less than 40% was identified. Mediastinitis occurred in 12 (5.21%) patients and despite the greater general incidence in the sample studied, no statistical significance was found. Strokes occurred in 12 patients (5.21%) and in spite of the higher mean percentage incidence of observed strokes for all scores, a level of statistical significance was not found. CONCLUSIONS: Although the incidences of mediastinitis and strokes were greater in the population studied, these values showed no statistical significance, confirming the score recommended by the NNECDSG as a safe and efficient method for predicting postoperative mediastinitis and strokes in patients submitted to myocardial revascularization surgery in the UFTM.

Avaliação do Escore NNECDSG em um hospital público brasileiro / Evaluation of the NNECDSG Score in a Brazilian public hospital

OBJETIVO: Comparar as incidências observadas de mediastinite e acidente vascular cerebral (AVC) versus as incidências esperadas pelo escore NNECDSG (Northern New England Cardiovascular Disease Study Group), em população submetida à cirurgia de revascularização do miocárdio. MÉTODO: Foram analisados, retrospectivamente, os prontuários de todos os pacientes submetidos à CRVM isolada, no período de 1/1/2000 a 31/12/2004, no Serviço de Cirurgia Cardíaca da Universidade Federal do Triângulo Mineiro (UFTM). Foi aplicado o escore proposto pelo NNECDSG e calculadas as incidências esperadas de mediastinite e AVC para cada paciente. Os dados de incidência observados e a incidência estimada pelo escore do NNECDSG foram submetidos ao teste de normalidade de Kolmogorov-Smirnov. A comparação foi realizada pelo teste t-Student pareado. O nível de significância foi de alfa=0,05. RESULTADOS: Foram analisados 230 pacientes, sendo 144 (62,60 por cento) homens e 86 (37,39 por cento) mulheres. Sessenta e um (26,52 por cento) doentes apresentavam diabetes, 30 (13,04 por cento), doença pulmonar obstrutiva crônica (DPOC) e 23 (10 por cento), doença vascular periférica (DVP). Cirurgia de urgência aconteceu em 34 (14,78 por cento) casos. Trinta e sete (16,08 por cento) pacientes tinham uma fração de ejeção (FE) menor que 40 por cento. Mediastinite ocorreu em 12 (5,21 por cento) pacientes. Apesar da incidência geral de mediastinite ter sido maior nesta amostra, não houve significância estatística. AVC ocorreu em 12 (5,21 por cento) pacientes. Apesar da incidência percentual média de AVC observada ter sido maior, não atingiu nível de significância estatística. CONCLUSÃO: Apesar das incidências de mediastinite e AVC terem sido maiores na população estudada, estes valores não atingiram significância estatística, sendo o escore preconizado pela NNECDSG um método seguro e eficaz na predição de mediastinite e AVC pós-operatórios nos pacientes submetidos à CRVM na UFTM.

OBJECTIVE: To compare the observed incidence of mediastinitis and strokes versus the expected incidence according to the NNECDSG score (Northern New England Cardiovascular Disease Study Group) in a population submitted to coronary artery bypass graft surgery. METHODS:A retrospective consultation was made of medical records of all patients submitted to isolated CABG from January 1st, 2000 to December 31st, 2004, at the Cardiac Surgery Service of the Triângulo Mineiro Federal University (UFTM). Data regarding the incidences of observed mediastinitis and strokes and those estimated by the NNECDSG score were submitted to the Kolmogorov-Smirnov normality test. A comparison was achieved using the paired Student t test, with the level of significance determined as p=0.05. RESULTS:A group of 230 patients were analyzed, including 144 (62.60 percent) men and 86 (37.39 percent) women. Sixty-one (26.52 percent) presented with diabetes, 30 (13.04 percent) with chronic obstructive pulmonary disease (COPD) and 23 (10 percent) had peripheral vascular disease (PVD). Emergency surgery occurred in 34 (14.78 percent) cases. In 37 (16.08 percent) patients an ejection fraction (EF) of less than 40 percent was identified. Mediastinitis occurred in 12 (5.21 percent) patients and despite the greater general incidence in the sample studied, no statistical significance was found. Strokes occurred in 12 patients (5.21 percent) and in spite of the higher mean percentage incidence of observed strokes for all scores, a level of statistical significance was not found. CONCLUSIONS: Although the incidences of mediastinitis and strokes were greater in the population studied, these values showed no statistical significance, confirming the score recommended by the NNECDSG as a safe and efficient method for predicting postoperative mediastinitis and strokes in patients submitted to myocardial revascularization surgery in the UFTM.