ObjectiveTo analyze risk factors and long-term outcomes of surgical treatment for isolated tricuspid regurgitation (TR) after left-sided valve replacement. MethodsWe retrospectively analyzed clinical data of 65 patients who underwent surgical treatment for severe isolated TR after left-sided valve replacement in Guangdong Cardiovascular Institute from January 2000 to June 2013. There were 12 male and 53 female patients with their age of 37-72 (52.3±8.0) years. Fifty-nine patients had atrial fibrillation (AF). There were 61 patients with functional TR and 4 patients with rheumatic TR. Six patients were in New York Heart Association (NYHA) functional class Ⅱ,40 patients were in NYHA class Ⅲ,and 19 patients were in NYHA class Ⅳ.The duration between the first and second cardiac operation was 1-26 (11.2±4.7) years. Fifty-five patients received tricuspid valve replacement (TVR) and 10 patients received tricuspid valvuloplasty (TVP). ResultsEleven patients (16.9%) died postoperatively. Univariate analysis showed that male gender,right ventricular internal dimension,preoperative serum albumin level (ALB) direct bilirubin (DBil) level,cardiopulmonary bypass (CPB) time and preoperative NYHA functional class Ⅳ were significantly correlated with postoperative death. Preoperative cardiothoracic ratio(C/T) TR area,left ventricular ejection fraction (LVEF) pulmonary arterial systolic pressure (PAs) preoperative hemoglobin(HGB) level,creatinine (Cr) level,total bilirubin (TBil) level,alanine aminotransferase (ALT) level and the duration between the first and second cardiac operation were not significantly related with surgical mortality. Multivariate logistic regression analysis showed that preoperative NYHA functional class Ⅳ was an independent risk factor of in-hospital death (OR=7.23,95% CI:1.57-33.25,P=0.01). Among the 54 survivors,50 patients (92.6%) were followed up for 1-160(47.2±43.3) months. Five patients died during follow-up including 3 TVR patients with heart failure,1 TVR patient with aortic valve obstruction and 1 TVP patient with sudden cardiac arrest. One-year and 5-year survival rates of TVR patients were 95%±3% and 89%±7% respectively,and 1-year and 5-year survival rates of TVP patients were 100% and 80%±18% respectively(P=0.92). Cox regression analysis showed that preoperative Cr level was an independent risk factor of long-term mortality (HR=1.10,95% CI:1.03-1.17,P<0.01). ConclusionIn-hospital mortality of patients with isolated TR after left-sided valve replacement who undergo surgical treatment is significantly related with preoperative overall condition and heart function. Surgical therapy should be performed before severe heart failure occurs. Postoperative 5-year survival rate is good,and long-term mortality is related with preoperative Cr level.