ABSTRACT
Patients with ischaemic cardiomyopathy and left ventricular (LV) systolic dysfunction represent the highest-risk population with heart failure (HF). The cornerstone of treatment remains guideline-driven medical therapy, which is associated with significant improvement in survival and quality of life. The most commonly considered surgical interventions are coronary artery bypass graft surgery, at times combined with surgical ventricular reconstruction (SVR) and surgery for mitral valve regurgitation. Surgical ventricular reconstruction has been introduced as an optional therapeutic strategy aimed to reduce LV volumes through the exclusion of the scar tissue, thereby restoring the physiological volume and shape and improving cardiac function and clinical status. This review will briefly discuss the rationale to surgically reverse LV remodelling, the technique, and the indications, to the best of our knowledge, coming from the Center with the largest worldwide experience. The evolving data on the role of SVR for the treatment of ischaemic HF will be addressed as well.
ABSTRACT
BACKGROUND: The present study was aimed at determining the impact of type 2 diabetes mellitus (DM) on postoperative bioprosthetic structural valve degeneration. METHODS AND RESULTS: Twelve Italian centers participated in the study. Patient data refer to bioprosthetic implantations performed from November 1988 to December 2009, which resulted in 6184 patients (mean age 71.3±5.4 years, 60.1% male) being enrolled. Of these patients, 1731 (27.9%) had type 2 DM. The propensity score-matching algorithm successfully matched 1113 patients with type 2 DM with the same number of no-DM patients. The postmatching standard differences were less than 0.1 for each of the covariates, and 64.2% of DM patients were matched. The early (30 days) mortality rate was 7.8% (n=87) versus 2.9% (n=33) in patients with or without type 2 DM (P<0.001), respectively. Seven-year freedom from valve deterioration was significantly lower in patients with DM (73.2% [95% confidence interval, 61.6-85.5] versus 95.4% [95% confidence interval, 83.9-100], P<0.001). In Cox regression models with robust SEs that accounted for the clustering of matched pairs, DM was the strongest predictor of structural valve degeneration (hazard ratio 2.39 [95% confidence interval 2.28-3.52]). When we allowed for interaction between type 2 DM and other key risk factors, DM remained a significant predictor beyond any potentially associated variable. CONCLUSIONS: Patients with type 2 DM undergoing bioprosthetic valve implantation are at high risk of early and long-term mortality, as well as of structural valve degeneration.
