Plasma brain natriuretic peptide values after ventricular septal defect repair : a potential predictor of negative outcomes

ÖZ Amaç: Bu çalışmada ventriküler septal defekt tamiri sonrası plazma beyin natriüretik peptid değerleri ile klinik sonuçlar arasında doğrusal bir ilişki olup olmadığı araştırıldı. Ça­lış­ma­pla­nı:­Hastanemiz çocuk kalp cerrahisi kliniğinde prospektif bir kohort çalışması planlandı. Bu kesitsel çalışmaya Şubat 2012 Ekim 2012 tarihleri arasında ventriküler septal defekt tamiri uygulanan 20 hasta (13 erkek, 7 kız; ort. yaş 9.2±4.3 ay; dağılım 4-18 ay) alındı. Hastalardan cerrahi öncesinde başlangıçta ve cerrahi sonrası dönemde altı farklı zaman noktasında kan örneklemesi yapıldı. Bul gu lar: Hastane mortalitesi 5% idi. Ortalama B-tip natriüretik peptid düzeylerinin cerrahi öncesi değeri, cerrahi öncesi pulmoner arter basıncı ile anlamlı bir ilişki gösteriyordu (p<0.001). Ortalama B-tip natriüretik peptid değerleri cerrahi sonrası oldukça geniş dağılım gösteriyordu (ort±SS: 980.05±1125.38). B-tip natriüretik peptid düzeylerinin cerrahi öncesi değeri, cerrahi sonrası herhangi bir zaman noktasındaki B-tip natriüretik peptid değerleri ile ilişki gösteriyordu. B-tip natriüretik peptid düzeylerinin bireyler içi ortalaması ile artan inotrop skoru, uzamış ekstübasyon zamanı ve yoğun bakımda kalış süresi arasındaki ilişki istatistik olarak anlamlı bulunmazken (p>0.05), bireyler içi dağılımın standart sapması daha uzun yoğun bakım kalış süresi ile ilişkili bulundu (p<0.003). So­nuç:­ Ventriküler septal defekt tamiri sonrası, ardışık B-tip natriüretik peptid ölçümlerinin geniş birey içi dağılım göstermesi, olumsuz sonuçların muhtemel bir belirteci olabilir. Anah­tar­ söz­cük­ler: B-tip natriüretik peptid; doğuştan kalp defekti; cerrahi. ABSTRACT Background:­This study aims to investigate whether there is a linear relationship between clinical outcomes and plasma brain natriuretic peptide levels following ventricular septal defect repair. Methods: A prospective cohort study was designed at the pediatric cardiac surgery clinic of our institution. This cross-sectional study included 20 patients (13 boys, 7 girls; mean age 9.2±4.3 months; range, 4 to 18 months) who underwent ventricular septal defect repair between February 2012 and September 2012. Blood samples were taken at baseline before surgery, followed by six sampling at different time points during the postoperative course. Results:­In-hospital mortality was 5%. The mean preoperative B-type natriuretic peptide levels were significantly correlated with the preoperative mean pulmonary artery pressure (p<0.001). The mean B-type natriuretic peptide levels showed a great postoperative variation (mean±SD: 980.05±1125.38). The preoperative B-type natriuretic peptide values were significantly correlated with postoperative values at each time point. The correlation between intra-individual B-type natriuretic peptide, the mean and increased inotrope scores, prolonged time to extubation, and prolonged intensive care unit stay was under the limit of significance (p>0.05), whereas intra-individual B-type natriuretic peptide standard deviation was correlated with longer times of intensive care unit stay (p<0.003). Conclusion:­ High intra-individual variability in serial measurements of B-type natriuretic peptide may be potentially a predictor of adverse outcomes following ventricular septal repair.

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