The Canadian journal of cardiology · 2010
Patient-prosthesis mismatch in the mitral position affects midterm survival and functional status.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Bouchard Denis, Vanden Eynden Frédéric, Demers Philippe, Perrault Louis P, Carrier Michel, Cartier Raymond, Basmadjian Arsène J, Pellerin Michel
Аннотация
BACKGROUND: The definition and incidence of patient-prosthesis mismatch (PPM) in the mitral position are unclear.
OBJECTIVES: To determine the impact of PPM on late survival and functional status after mitral valve replacement with a mechanical valve.
METHODS: Between 1992 and 2005, 714 patients (mean [± SD] age 60±10 years) underwent valve replacement with either St Jude (St Jude Medical Inc, USA) (n=295) or Carbomedics (Sulzer Carbomedics Inc, USA) (n=419) valves. There were 52 concomitant procedures (50 tricuspid annuloplasties, 25 foramen oval closures and 20 radiofrequency mazes). The mean clinical follow-up period was 4.4±3.3 years. The severity of PPM was established with cut-off values for an indexed effective orifice area (EOAi) of lower than 1.2 cm(2)⁄m(2), lower than 1.3 cm(2)⁄m(2) and lower than 1.4 cm(2)⁄m(2). Parametric and nonparametric tests were used to determine predictors of outcome.
RESULTS: The prevalence of PPM was 3.7%, 10.1% and 23.5% when considering values of lower than 1.2 cm(2)⁄m(2), lower than 1.3 cm(2)⁄m(2) and lower than 1.4 cm(2)⁄m(2), respectively. When considering functional improvement, patients with an EOAi of 1.4 cm(2)⁄m(2) or greater had a better outcome than those with an EOAi of lower than 1.4 cm(2)⁄m(2) (OR 1.98; P=0.03). When building a Cox-proportional hazard model, PPM with an EOAi of less than 1.3 cm(2)⁄m(2) was an independent predictive factor for midterm survival (HR 2.24, P=0.007). Other factors affecting survival were age (HR 1.039), preoperative New York Heart Association class (HR 1.96) and body surface area (HR 0.31).
CONCLUSIONS: In a large cohort of patients undergoing mitral valve replacement with mechanical prostheses, PPM defined as an EOAi of lower than 1.3 cm(2)⁄m(2) significantly decreased midterm survival. This level of PPM was observed in 10.2% of patients. Patients with an EOAi of 1.4 cm(2)⁄m(2) or greater had greater improvement of their functional status.
OBJECTIVES: To determine the impact of PPM on late survival and functional status after mitral valve replacement with a mechanical valve.
METHODS: Between 1992 and 2005, 714 patients (mean [± SD] age 60±10 years) underwent valve replacement with either St Jude (St Jude Medical Inc, USA) (n=295) or Carbomedics (Sulzer Carbomedics Inc, USA) (n=419) valves. There were 52 concomitant procedures (50 tricuspid annuloplasties, 25 foramen oval closures and 20 radiofrequency mazes). The mean clinical follow-up period was 4.4±3.3 years. The severity of PPM was established with cut-off values for an indexed effective orifice area (EOAi) of lower than 1.2 cm(2)⁄m(2), lower than 1.3 cm(2)⁄m(2) and lower than 1.4 cm(2)⁄m(2). Parametric and nonparametric tests were used to determine predictors of outcome.
RESULTS: The prevalence of PPM was 3.7%, 10.1% and 23.5% when considering values of lower than 1.2 cm(2)⁄m(2), lower than 1.3 cm(2)⁄m(2) and lower than 1.4 cm(2)⁄m(2), respectively. When considering functional improvement, patients with an EOAi of 1.4 cm(2)⁄m(2) or greater had a better outcome than those with an EOAi of lower than 1.4 cm(2)⁄m(2) (OR 1.98; P=0.03). When building a Cox-proportional hazard model, PPM with an EOAi of less than 1.3 cm(2)⁄m(2) was an independent predictive factor for midterm survival (HR 2.24, P=0.007). Other factors affecting survival were age (HR 1.039), preoperative New York Heart Association class (HR 1.96) and body surface area (HR 0.31).
CONCLUSIONS: In a large cohort of patients undergoing mitral valve replacement with mechanical prostheses, PPM defined as an EOAi of lower than 1.3 cm(2)⁄m(2) significantly decreased midterm survival. This level of PPM was observed in 10.2% of patients. Patients with an EOAi of 1.4 cm(2)⁄m(2) or greater had greater improvement of their functional status.