We retrospectively analyzed early results of coronary artery bypass grafting (CABG) surgery using two different types of cardioplegia for myocardial protection: antegrade intermittent warm blood or cold crystalloid cardioplegia. From January 2015 to October 2016, 330 consecutive patients underwent isolated on-pump CABG. Cardiac arrest was obtained with use of warm blood cardioplegia (WBC group, n = 297) or cold crystalloid cardioplegia (CCC group, n = 33), according to the choice of the surgeon. Euroscore II and preoperative characteristics were similar in both groups, except for the creatinine clearance, slightly lower in WBC group (77.33 ± 27.86 mL/min versus 88.77 ± 51.02 mL/min) (P < 0.05). Complete revascularization was achieved in both groups. In-hospital mortality was 2.0% (n = 6) in WBC group, absent in CCC group. The required mean number of cardioplegia’s doses per patient was higher in WBC group (2.3 ± 0.8) versus CCC group (2.0 ± 0.7) (P = 0.045), despite a lower number of distal coronary artery anastomoses (2.7 ± 0.8 versus 3.2 ± 0.9) (P = 0.0001). Cardiopulmonary and aortic cross-clamp times were similar in both groups. The incidence of perioperative myocardial infarction (WBC group 3.4% versus CCC group 3.0%) and low cardiac output syndrome (4.4% versus 3.0%) were similar in both groups. As compared with WBC group, in CCC group CK-MB/CK ratio >10% was lower during each time points of evaluation, with a statistical significant difference at time 0 (4% ± 1.6% versus 5% ± 2.5%) (P = 0.021). In presence of complete revascularization, despite the value of CK-MB/CK ratio >10% was less in the CCC group, clinical results were not affected by both types of cardioplegia adopted to myocardial protection. As compared with cold crystalloid, warm blood cardioplegia requires a shorter interval of administration to achieve better myocardial protection.

Background: Despite advanced diagnosis and treatment, infective endocarditis (IE) is a potentially life-threatening condition. The impact of COVID-19 on the diagnosis and outcome of the surgical treatment of IE is uncertain. The aim of this study was to analyze the incidence, characteristics, and outcomes of surgically treated IE before and after the COVID-19 pandemic. Methods: This study retrospectively analyzed the data of 535 patients who underwent valve surgical procedures for IE between January 2010 and December 2022 in a single cardiac surgery center. Patients were divided into two groups depending on the date of their operation: before (n = 393) and after (n = 142) COVID-19 onset. In order to balance the groups, inverse probability of treatment weighting (IPTW) calculated from the propensity score (PS) was applied. Weighted univariate logistic regressions were reported for outcomes; weights were derived from IPTW. Interrupted time series analysis (ITSA) according to Linden’s method was used to evaluate the changes in the manifestation of IE after 11 March 2020. Results: Patients from the post-COVID-19 cohort (after 11 March 2020) had a greater number of comorbidities such as diabetes (29.6% vs. 16.3% p = 0.001), hypertension (71.1% vs. 59.5% p = 0.015), and preoperative kidney injury requiring dialysis (9.2% vs. 2.5% p = 0.002), but the median additive and logistic EuroSCORE were not statistically different. In the post-COVID-19 group, we observed a greater prevalence of Staphylococcus aureus-related endocarditis (24.5% vs. 15.4% p = 0.026), a consequent reduction in Staphylococcus non aureus-related endocarditis (12.2% vs. 20.1% p = 0.048), and a decrease in aortic valve replacements (43.0% vs. 53.9%), while the number of mitral valve replacements and repair was greater (21.1% vs. 15.0% and 6.3% vs. 4.3%, respectively). No differences were found in the two groups concerning early death, death, or relapse at 1 year after surgery. Data obtained by multivariable analysis identified preoperative renal dysfunction requiring dialysis as the only common risk factor for early mortality via stratifying by time periods in analysis. Conclusions: The incidence of surgically treated IE significantly increases after the COVID-19 pandemic with a higher incidence of mitral valve involvement with respect to the aortic valve. Although a delay in surgical timing occurred during the COVID-19 pandemic, data in terms of mortality and outcomes were largely unaffected.

Background: The benefits of mitral repair versus replacement for endocarditis are inconclusive. This study compares outcomes of patients with infective endocarditis undergoing mitral valve repair versus replacement and investigates the impact of microbial etiology. Methods: All 251 patients undergoing mitral valve surgery for active endocarditis between 2010 and 2023 were enrolled, 180 (71.7%) replacement and 71 (28.3%) repair. To adjust for imbalances, inverse probability of treatment weighting was applied and 187 patients were obtained. Results: The analysis between groups, following the application of inverse probability of treatment weighting, showed no statistically significant differences across all considered outcomes. Early and late death was observed respectively in 6 (8.5%) and 11 (15.5%) patients in the repair group versus 24 (13.3%) and 45 (25.0%) in the replacement group without statistical significance (p = 0.221 and p = 0.446). Relapse occurred in six patients (8.5%) in the repair group after a median time of 4.0 months and in six (3.3%) in the replacement after 6.9 months (p = 0.071). Conclusions: Surgical strategy in mitral endocarditis has no effect on major postoperative complications, mortality, or medium/long-term survival. Staphylococcus aureus and Coagulase-negative Staphylococci represent a risk for early mortality and relapse. However, mitral valve repair for endocarditis can be pursued when it ensures the complete eradication of all infected tissue, particularly in cases caused by Streptococcus infection, in young patients, and after a minimum of 18 days of antibiotic therapy.

Background: This study evaluates the outcomes of isolated mitral valve surgery for infective endocarditis performed via conventional full sternotomy or minimally invasive right minithoracotomy. While minimally invasive surgery (MIS) is well-established for elective mitral procedures, its role in infective endocarditis remains less explored due to the complexity of the disease. Methods: A retrospective analysis of 134 patients who underwent isolated mitral valve surgery for infective endocarditis between January 2010 and March 2024 was conducted. Patients were divided into two groups based on the surgical approach: full sternotomy (n = 94) and MIS via right minithoracotomy (n = 40). Variables analyzed included preoperative characteristics, intraoperative details, and postoperative outcomes, such as mortality, complications, and hospital stay duration. Given significant baseline differences, inverse probability weighting was applied for comparability. Results: Mitral valve replacement was performed in 77% of cases. After adjustment, the MIS group demonstrated shorter intensive care unit stays (p = 0.018), with no significant differences in in-hospital mortality (p = 0.145) or total hospitalization length (p = 0.151). Conclusions: Minimally invasive mitral valve surgery is a safe and effective alternative to sternotomy in infective endocarditis, offering comparable outcomes with shorter ICU stays. Further research is needed to refine patient selection and validate these findings.

Background: This study examines the impact of Body Mass Index (BMI) on outcomes after mitral valve surgery via right minithoracotomy, an approach that may reduce wound complications in obese patients. Methods: Between January 2010 and December 2024, 1773 adult patients underwent minimally invasive mitral valve surgery at our institution. They were categorized into three groups: normal weight (BMI < 25, n = 942), overweight (BMI 25–30, n = 661), and obese (BMI > 30, n = 170). Results: The three groups exhibited significant differences, with a higher prevalence of hypertension, dyslipidemia, and diabetes (p < 0.001) in overweight and obese patients. Further-more, they had a greater incidence of preoperative atrial fibrillation (p < 0.001), prior stroke (p = 0.023), chronic obstructive pulmonary disease (p = 0.002), and elevated preoperative creatinine levels (p < 0.001). and their euroscore II was significantly higher (p = 0.040). In-hospital mortality and major complications were similar across groups, except for drainage output in the first 24 h (p = 0.002) and ICU stay (p = 0.022), both resulting higher in the overweight and obese patients. We employed inverse probability of treatment weighting (IPTW) to create three well-matched groups. Following IPTW, postoperative outcomes remained comparable across groups. However, obese patients exhibited a higher incidence of postoperative atrial fibrillation (p = 0.037) and required pacemaker implantation more frequently (p < 0.001). Conclusions: Our findings suggest that obesity does not increase the risk of mortality or major adverse events after minimally in-vasive mitral valve surgery. This approach may offer a less invasive alternative for obese patients, potentially reducing the risk of wound complications associated with conventional surgery.

Background: Infective endocarditis (IE) is a serious public health concern due to its high morbidity and lethality. This study investigates epidemiological trends in aortic valve endocarditis, focusing on sex-related differences in microbial etiology and surgical outcomes over a 15-year period. Methods: From January 2010 to January 2024, 608 patients underwent cardiac surgery for IE at our center. Of these, 274 patients received isolated aortic valve replacement. This retrospective, single-center study analyzes these cases. Results: Despite a decline in overall aortic valve replacement surgeries, a significant increase in surgeries due to aortic valve endocarditis was observed (p < 0.001). Both sexes showed a rising incidence of aortic valve endocarditis, with females undergoing surgery at an older age, particularly in native valve cases (p = 0.008). In prosthetic valve cases, this age difference was less pronounced (p = 0.050). While sex did not influence microbial etiology in native valve endocarditis, females with prosthetic valves were more frequently infected by Streptococcus (p = 0.033). Staphylococcus aureus infections increased in native valves (p = 0.016). Conclusions: Over 15 years, surgical aortic valve endocarditis has risen in both sexes. Males are more often affected by native valve cases, while females develop it later. Neither gender nor microbial etiology independently predicts death.