Impact of Sex on Long-Term Outcomes Following Surgical Aortic Valve Replacement.

BACKGROUND: The impact of sex on outcomes following surgical aortic valve replacement (SAVR) remains unclear. It has been proposed that females experience inferior outcomes, but this has yet to be conclusively established, particularly in the long term. The objective of this study is to identify discrepancies in postoperative outcomes between males and females following SAVR to better inform consideration for surgical intervention. METHOD: We retrospectively reviewed the outcomes of 4,927 patients who underwent SAVR from 2004 to 2018 at our centre. In total, 531 propensity-matched males and females were included in the final analysis. The primary outcome was mortality at any point during the follow-up period. Secondary outcomes included various measures of postoperative morbidity. Follow-up duration was 15 years. RESULTS: In SAVR all-comers, females experienced inferior short-term mortality, but equivalent mid-term and long-term mortality. Rates of mediastinal bleeding, sternal wound infections, sepsis, heart failure, and pacemaker insertion were all equivalent between the sexes; however, males experienced a higher rate of acute kidney injury and readmission for stroke at the longest follow-up while females experienced a longer intensive care unit and hospital length of stay. In a sub-analysis of isolated SAVR, males and females experienced equivalent early, mid, and late mortality. Of note, a trend towards increased aortic valve reoperation was noted in females at the longest follow-up. CONCLUSIONS: Males and females experience equivalent long-term mortality following isolated SAVR. Sex is not an independent risk factor of poor outcomes post-SAVR; however, the increased preoperative risk profile of females requires diligent consideration.

Outcomes Following Surgical Repair of Sinus Venosus Atrial Septal Defects: A Systematic Review and Meta-Analysis.

BACKGROUND: Sinus venosus atrial septal defect (SVASD) is a rare congenital cardiac anomaly comprising 5% to 10% of all atrial septal defects. Although surgical closure is the standard treatment for SVASD, data on outcomes have been confined to small cohorts. Thus, we conducted a systematic review of the outcomes of SVASD repair. METHODS AND RESULTS: The primary outcome was death. Secondary outcomes encompassed atrial fibrillation, sinus node dysfunction, pacemaker insertion, cerebrovascular accident, reoperation, residual septal defect, superior vena cava obstruction, and reimplanted pulmonary vein obstruction. Pooled incidences of outcomes were calculated using a random-effects model. Forty studies involving 1320 patients who underwent SVASD repair were included. The majority were male patients (55.4%), with 88.0% presenting with associated anomalous pulmonary venous connection. The weighted mean age was 18.6±12.5 years, and the overall weighted mean follow-up period was 8.6±10.4 years. The in-hospital mortality rate was 0.24%, with a 30-day mortality rate of 0.5% reported in 780 patients. Incidences of atrial fibrillation, sinus node dysfunction, pacemaker insertion, and cerebrovascular accident over the long-term follow-up were 3.3% (2.18%-4.93%), 6.5% (5.09%-8.2%), 2.23% (1.34%-3.57%), and 2.03% (0.89%-2.46%) respectively. Reoperation occurred in 1.36% (0.68%-2.42%) of surgeries, residual septal defect in 1.34% (0.69%-2.42%), superior vena cava obstruction in 1.76% (1.02%-2.9%), and reimplanted pulmonary vein obstruction in 1.4% (0.7%-2.49%). CONCLUSIONS: This is the first comprehensive analysis of outcomes following surgical repair of SVASD. The findings affirm the safety and effectiveness of surgery, establishing a reference point for evaluating emerging transcatheter therapies. Safety and efficacy profiles comparable to surgical repair are essential for widespread adoption of transcatheter treatments.

Aortic remodelling based on false lumen communications in patients undergoing acute type I dissection repair with AMDS hybrid prosthesis: a substudy of the DARTS trial.

OBJECTIVES: The Dissected Aorta Repair Through Stent (DARTS) Implantation trial demonstrated positive proximal aortic remodelling following aortic dissection repair with the AMDS hybrid prosthesis. In this study, we look to identify predictors of aortic remodelling following aortic dissection repair with AMDS including whether communications between branch vessels and the false lumen (FL) predict aortic growth. METHODS: The DARTS implantation trial included patients who underwent acute DeBakey type I aortic dissection (ATAD I) repair with the AMDS from March 2017 to January 2019. Anatomic measurements were collected from original computerized tomography scans. Measurements were taken at zones 2, 3, 6 and 9. Patients were grouped based on the number of FL communications with the supra-aortic branch vessels or visceral branch vessels. RESULTS: Forty-seven patients were included in the original DARTS implantation trial. Patients with FL communications with the supra-aortic branch vessels tended to have significant growth at zone 3 (P = 0.02-0.0018), while greater numbers of visceral FL communications tended to predict aortic growth at zones 3 (P = 0.003), 6 (P = 0.017-0.0087) and 9 (P = 0.0016-0.0003). CONCLUSIONS: Aortic remodelling following ATAD I repair using the AMDS may be predicted by local FL communications with branch vessels. Patients undergoing ATAD I repair were more likely to experience significant aortic growth in zone 3 with more head vessel communications and in zones 3, 6 and 9 with more visceral FL communications. Predictors of aortic remodelling may help to guide initial surgical management for aortic dissection patients.

Systematic review and meta-analysis of the impact of sex on outcomes after aortic valve replacement.

AIMS: In recent years, extensive literature has been produced demonstrating inferior outcomes for women when compared with men undergoing heart valve interventions. Herein, we seek to analyze the literature comparing outcomes between men and women undergoing surgical aortic valve replacement (SAVR). METHODS: A systematic literature search of PubMed, MEDLINE, and Embase was conducted for articles comparing differences in outcomes between adult men and women undergoing SAVR. One thousand nine hundred and ninety titles were screened, of which 75 full texts were reviewed, and a total of 19 manuscripts met the inclusion criteria and were included in this review. RESULTS: Pooled estimates of mortality demonstrated that women tended to have lower rates of survival within the first 30 days post-SAVR, although mid-term and long-term mortality did not differ significantly up to 10 years postoperatively. Pooled estimates of postoperative data indicated no difference in the rates of stroke and postoperative bleeding. Rates of aortic valve reoperation and acute kidney injury favored women. CONCLUSION: Despite the inferior outcomes for women post-SAVR that have been reported in recent years, the results of this meta-analysis demonstrate comparable results between the sexes with comparable mid- to long-term mortality in data pooled from the literature. Although mortality favored men in the short term, rates of aortic valve reoperation and acute kidney injury favored women. Future investigation into this field should focus on identifying discrepancies in diagnosis and initial surgical management in order to address any potential factors contributing to discrepant short-term outcomes. GRAPHICAL ABSTRACT: http://links.lww.com/JCM/A651.

Minimally Invasive Approaches to Mitral Valve Surgery: Where Are We Now? A Narrative Review.

Minimally invasive mitral valve surgery (MiMVS) has been increasing in prevalence. This review focuses on the approaches, clinical outcomes, and patient selection for MiMVS. There are 4 minimally invasive approaches to the mitral valve: right mini-thoracotomy (including video-assisted and fully endoscopic), robotic mitral surgery, and transapical beating heart off-pump neochordal repair. Advantages over conventional surgery include less blood loss and transfusion, improved postoperative mobility, shorter length of stay, less postoperative atrial fibrillation, fewer surgical site infections, and improved cosmesis. This range of minimally invasive techniques will continue to evolve, providing options that are tailored for different patient populations.

Relation of body mass index to long-term survival and cardiac remodelling for patients undergoing mitral valve replacement surgery.

BACKGROUND AND AIMS: Studies have demonstrated that obesity is paradoxically associated with reduced mortality following cardiac surgery. However, these studies have treated various types of cardiac surgery as a single entity. With mitral valve (MV) surgeries being the fastest-growing cardiac surgical interventions in North America, the purpose of this study was to identify the impact of body mass index (BMI) on long-term survival and cardiac remodelling of patients undergoing MV replacement (MVR). METHODS AND RESULTS: In this retrospective, single-center study, 1071 adult patients who underwent an MVR between 2004 and 2018 were stratified into five BMI groups (<20, 20-24.9, 25-29.9, 30-34.9, >35). Cox proportional hazard regression models were used to determine the association between BMI and all-cause mortality. Patients who were underweight had significantly higher all-cause mortality rates at the longest follow-up (median 8.2 years) than patients with normal weight (p = 0.01). Patients who were in the obese group had significantly higher readmission rates due to myocardial infarction (MI) at the longest follow-up (p = 0.017). Subgroup analysis revealed a significant increase in long-term all-cause mortality for female patients who were underweight. Significant changes in left atrial size, mitral valve peak and mean gradients were seen in all BMI groups. CONCLUSIONS: For patients undergoing mitral valve replacement, BMI is unrelated to operative outcomes except for patients who are underweight.

The Use of Sodium-Glucose Cotransporter-2 Inhibitors in Coronary Revascularization: Where Are We Now? A Systematic Review.

INTRODUCTION: Diabetes and coronary artery disease are two common conditions that often co-exist. In recent years, sodium-glucose cotransporter 2 inhibitors (SGLT2i) have been demonstrated to provide significant cardioprotective benefits, especially among patients with heart failure. OBJECTIVE: In this systematic review, we look to identify the outcomes SGLT2i use in patients undergoing coronary revascularization. METHODS: Pubmed and Embase were systematically searched for articles describing the outcomes of patients taking SGLT2i and undergoing coronary revascularization. 834 titles and abstracts were screened, 42 full texts were reviewed, and 18 studies were found to meet the inclusion criteria and were included in this review. RESULTS: For patients undergoing coronary artery bypass grafting and percutaneous coronary intervention, the use of SGLT2i resulted in reductions in mortality, hospitalization for heart failure, and improved blood glucose; however, these benefits were not consistently reported in the literature. Reduced inflammatory markers and positive cardiac remodeling were identified among patients taking SGLT2i. CONCLUSIONS: Sodium-glucose cotransporter 2 inhibitors (SGLT2i) have been demonstrated to provide benefits for patients with heart failure along with a host of positive modulatory effects on the cardiovascular system, including reductions in inflammatory properties, hypertension, and left ventricular volume load. Given the clear benefit provided by SGLT2i to patients with cardiovascular disease and a host of positive properties that are expected to be protective for patients with ischemic heart disease, future investigation into the relationship between SGLT2i and outcomes for patients undergoing revascularization is imperative.

Transannular rupture during transcatheter aortic valve replacement: management in a patient with prior cardiac surgery.

Annular rupture occurs in approximately 1% of transcatheter aortic valve replacement cases. Annular rupture often requires surgical management and is associated with high mortality. Repair of annular rupture in patients with previous coronary artery bypass grafting (CABG) is undercharacterized and poses a unique challenge given the increased difficulty and complexity from both an emergent and reoperative case. An 80-year-old male with previous CABG experienced annular rupture post-transcatheter aortic valve replacement requiring urgent surgical management. This case illustrates the successful repair of a rare and high-risk complication describing the approach utilized in correcting annular rupture in a patient with previous CABG.

Damage to the base of the main blood vessel supplying blood to the body (the aortic annulus) after transcatheter aortic valve replacement (TAVR), a minimally invasive procedure to replace a narrowed aortic valve that fails to open properly, is rare. Annular rupture, a term used for injuries that occur in the region of the base of the aorta during TAVR, often needs surgical management. It also carries a high risk of death. Repair of annular rupture in patients with previous coronary bypass surgery, a surgery used to treat coronary heart disease, a condition where blood vessels of the heart become narrowed due to a buildup of fatty material within their walls, is not well described and poses a unique challenge. An 80-year-old male with previous bypass surgery had an annular rupture after TAVR requiring urgent surgery. This case illustrates the successful repair of a rare and high-risk complication. This case report also describes the approach for correcting this complication in a patient with previous bypass surgery.

Comparing the Effectiveness of 2 Cardiac Rehabilitation Exercise Therapy Programs.

Cardiovascular diseases are among the leading causes of morbidity and mortality in Canada, highlighting the critical role of disease prevention and risk reduction programs. Cardiac rehabilitation (CR) is a key component of comprehensive cardiovascular care. Currently, more than 200 CR programs are established across the country, varying in duration, number of in-person supervised exercise sessions, and recommendations for exercise frequency at-home. In an increasingly cost-conscious healthcare environment, the effectiveness of healthcare services must be consistently reevaluated. This study evaluates the impact of 2 CR programs implemented by the Northern Alberta Cardiac Rehabilitation Program, by comparing peak metabolic equivalents achieved by study participants in each program. We hypothesize that our "hybrid" CR program, which is structured as an 8-week program with weekly in-person exercise sessions and a prescribed home exercise program, has patient outcomes similar to those of our "traditional" CR program, which required biweekly in-person exercise sessions over the course of 5 weeks. The results of this study may have implications for evaluating how to minimize barriers to both rehabilitation participation and long-term effectiveness of CR programs. The results may help inform the structuring and funding of future rehabilitation programs.

Les maladies cardiovasculaires (MCV) sont parmi les premières causes de morbidité et de mortalité au Canada d'où l'importance des programmes de prévention des MCV et de réduction du risque cardiovasculaire. La réadaptation cardiaque est un élément clé du continuum de soins cardiovasculaires. À l'heure actuelle, il existe plus de 200 programmes de réadaptation cardiaque au pays, qui diffèrent tant par leur durée, par le nombre de séances d'exercice supervisées en personne que par leurs recommandations sur la fréquence des exercices à domicile. Dans un contexte où le coût des soins de santé est de plus en plus préoccupant, l'efficience des services de santé doit constamment être réévaluée. Cette étude évalue les effets de deux programmes de réadaptation cardiaque instaurés par le Cardiac Rehabilitation Program du nord de l'Alberta en comparant l'équivalent métabolique maximal obtenu par les participants à l'étude pour chaque programme. L'hypothèse de départ était que notre programme de réadaptation cardiaque « hybride ¼, qui consiste d'une part en un programme de huit semaines de séances hebdomadaires d'exercices en personne et d'autre part en un programme d'exercices à domicile, donnerait des résultats semblables à ceux de notre programme « traditionnel ¼ de réadaptation cardiaque. Celui-ci se compose de deux séances d'exercices en personne par semaine, pendant cinq semaines. Les résultats de cette étude pourraient nous aider à réduire les obstacles qui nuisent à la participation aux programmes de réadaptation et à l'efficience à long terme de ces programmes. Nous espérons apporter un éclairage sur la structure et le financement des futurs programmes de réadaptation.

Surgical vs transcatheter aortic valve replacement in bicuspid aortic valve stenosis: A systematic review and meta-analysis.

This systematic review and meta-analysis aim to provide a comprehensive analysis of the literature directly comparing the outcomes of surgical aortic valve replacement (SAVR) and TAVR in patients with BAV stenosis. Medline, PubMed, and Scopus were systematically searched for articles published between 2000 and 2023, 1862 studies were screened, and 6 retrospective studies met the inclusion criteria. We included 6550 patients in the final analyses: 3,292 and 3,258 in the SAVR and TAVR groups, respectively. Both groups have similar rates of in-hospital mortality (odds ratio (OR) 1.11; 95% CI 0.59-2.10; p = 0.75) and stroke (OR 1.25; 95% CI 0.85-1.86; p = 0.26. Patients who underwent SAVR experienced lower rates of permanent pacemaker implantation (OR 0.54; 95% CI 0.35-0.83; p = 0.005) and paravalvular leak (OR 0.47; 95% CI 0.26-0.86; p = 0.02). On the other hand, patients who underwent TAVR displayed lower rates of acute kidney injury (OR 1.81; 95% CI 1.15-2.84; p = 0.010), major bleeding (OR 3.76; 95% CI 2.18-6.49; p < 0.00001), and pulmonary complications (OR 7.68; 95% CI 1.21-48.84; p = 0.03). Despite the early mortality data suggesting that TAVR may be a reasonable strategy for patients with bicuspid AS with low to intermediate surgical risk, the increased risk of PPI and PVL is concerning. A prospective, randomized, controlled trial reporting long-term outcomes with pre-defined subgroup analyses based on BAV morphology is paramount. In the interim, caution should be exercised in the widespread adoption of TAVR in lower surgical-risk patients.

Effect of glucagon-like peptide-1 receptor agonists administration during coronary artery bypass grafting: a systematic review and meta-analysis of randomized control trials.

Aim: To determine if glucagon-like peptide-1 receptor agonists (GLP-1 RAs) can benefit patients receiving coronary artery bypass graft (CABG), GLP-1 RAs administration alongside standard insulin was compared with perioperative insulin alone. Materials & methods: All articles from Pubmed and Scopus databases that compared GLP-1 RA administration to insulin alone during CABG were included for meta-analysis. Short-term postoperative outcomes were analyzed between groups. Results: Average postoperative blood glucose levels significantly favored GLP-1 RA with a mean difference of -0.72 (p < 0.001). No other variables were significantly different between GLP-1 RA and insulin alone. Conclusion: GLP-1 RA is a safe option for perioperative care of CABG patients that can potentially improve postoperative outcomes of CABG patients by improving glycemic control and reducing hyperglycemic episodes.

What is this article about? Coronary artery bypass graft (CABG) is a common surgery for patients who have blocked blood vessels in their heart preventing their heart from functioning properly. Compared with other treatment options, CABG has better long-term outcomes and chances of survival, especially for patients with diabetes. Some medications that lower blood sugar levels in patients with diabetes, are also well known to improve heart health in this population. Because of these benefits, the specific medication called GLP-1 RA, has been proposed as an option to improve outcomes of people receiving CABG surgery. What were the results? By taking a systematic approach, 1375 articles were screened to find seven trials that tested the comparison of GLP-1 RA versus a control of just insulin in CABG patients. Analyzing this data, CABG patients receiving GLP-1 RA had significantly lower blood sugar levels compared with patients getting the control. The GLP-1 RA group also, on average, had similar or lower levels of heart rate arrhythmias, events of critically low blood sugar and the need of serious interventions compared with the control group. What do the results of the study mean? These results demonstrate that GLP-1 RA have similar or improved outcomes compared with standard therapy alone, suggesting it as a safe option for CABG patients. By lowering blood sugar levels, GLP-1 RA could also decrease complication rates and improve patient management compared with standard therapy alone, since high blood sugar levels are correlated with increased complications and worse postoperation outcomes.

Teaching heart valve surgery techniques using simulators: a systematic review.

The apprentice model has traditionally been the primary method of teaching cardiac surgery trainees. Limitations of this model include insufficient time to learn all necessary skills, minimal exposure to rare cases and to complex repair techniques, small number of patients in small centres, high cost and absence of objective measures of feedback. In recent years, simulation-based training (SBT) has been used in order to address the gaps left by the apprentice model. We performed a systematic review of PubMed and Embase for articles investigating the use of SBT in teaching surgical valve techniques published in 2022 or earlier in order to summarize the current literature regarding the use of SBT for trainees learning surgical valve repair and replacement techniques. We compiled data on the impact of SBT on time to completion of tasks, proportion of trainees who committed technical errors, skills scores and theoretical knowledge. Studies in which outcomes were evaluated showed significant improvement in these measures after participation in SBT. Simulation-based training has been shown to improve the surgical skills of trainees in a rela-tively short period. As hands-on experience in the field of cardiac surgery is invaluable and often difficult to reproduce effectively, it is likely that a combination of hands-on training and SBT will be adopted moving forward to provide optimal exposure for surgical trainees.

Quantifying the immune response to a tissue-engineered porcine extracellular matrix.

Aim: Structural valvular deterioration of xenogenic heart valve replacements is thought to be due to a chronic immune response. We sought to engineer porcine extracellular matrix that elicits minimal inflammatory immune response. Materials & methods: Whole blood, bone marrow and pericardium were collected from patients undergoing elective cardiac surgery. Porcine extracellular matrix was decellularized, reseeded with homologous mesenchymal stem cells and exposed to whole blood. Results: DAPI stain confirmed the absence of cells after decellularization, and presence of mesenchymal stem cells after recellularization. There was a significant reduction in IL-1ß and TNF-α production in the recellularized matrix. Conclusion: Recellularization of porcine matrix is successful at attenuating the xenogenic immune response and may provide a suitable scaffold to address the current limitations of prosthetic heart valve replacements.

Deterioration of tissue heart valve replacements is thought to be due to a chronic immune response. We sought to remove cells from a pig derived tissue and replace those cells with human stem cells to create a scaffold that results in a reduced immune response. Whole blood, bone marrow and pericardium were collected from patients undergoing elective cardiac surgery. The pig derived tissue had the cells removed, were replaced with human stem cells and exposed to whole blood. Tissue stain confirmed the absence of cells after removal, and presence of stem cells after replacement of cells. There was a significant reduction in markers of immune response in the recellularized tissue. Removal of cells from pig derived tissue and replacement with human stem cells is successful at reducing the immune response to animal tissue and may provide a suitable scaffold to address the current limitations of heart valve replacement options.

Alternative Approaches to Coronary Artery Bypass Grafting Versus Percutaneous Coronary Intervention, How Do They Compare?: A Systematic Review and Meta-Analysis.

Coronary artery disease (CAD) is a leading cause of mortality worldwide. Severe symptomatic CAD is treated with coronary artery bypass grafting (CABG) or percutaneous coronary intervention (PCI). Alternative CABG (ACABG) approaches including thoracotomy, off-pump, total endoscopic, and robotic-assisted CABG are increasing in prevalence to address the increased early risk of CABG. This systematic review and meta-analysis aims to review the contemporary literature comparing outcomes after ACABG and PCI. Pubmed, Medline, and Embase were systematically searched by 2 authors for articles comparing the outcomes after ACABG and PCI. A total of 1154 articles were screened, and 11 were included in this review. The RevMan 5.4 software was used to perform a meta-analysis of the pooled data. Individual studies found rates of long-term survival, major adverse cardiovascular and cerebrovascular events (MACCE), myocardial infarction (MI), and repeat revascularization either favored ACABG or did not differ significantly. Pooled estimates of the compiled data identified rates of MACCE, MI, and repeat revascularization favored ACABG. The results of this review demonstrated the favorable rates of long-term mortality, MACCE, MI, and repeat revascularization for ACABG in addition to similar short-term mortality and stroke when compared with PCI. Advancement of both CABG and PCI continues to improve patient outcomes. With the increasing prevalence of ACABG, similar studies will need to be undertaken with further direct comparisons between ACABG and PCI. Finally, hybrid revascularization should continue to be explored for its combined benefits of long-term outcomes, short-term safety, and ability to achieve complete revascularization.

The influence of renal disease on outcomes and cardiac remodeling following surgical mitral valve replacement.

OBJECTIVES: Chronic kidney disease (CKD) is increasingly prevalent in patients undergoing mitral valve replacement (MVR). While CKD is known to result in suboptimal outcomes for patients with mitral valve disease, there is limited literature evaluating the long-term outcomes and cardiac remodeling of patients with CKD undergoing MVR. We present the first analysis coupling long-term outcomes of combined morbidity, mortality, and cardiac remodeling post-MVR in patients with CKD. METHODS: Patients with varying degrees of CKD undergoing MVR from 2004 to 2018 were compared. Patients were grouped by estimated glomerular filtration rate (eGFR) > 90 mL/min/1.73m2 (n = 109), 60-89 mL/min/1.73m2 (450), 30-59 mL/min/1.73m2 (449), < 30 mL/min/1.73m2 (60). The primary outcome was mortality. Secondary outcomes included measures of postoperative morbidity and cardiac remodeling. RESULTS: One-year mortality was significantly increased in patients with eGFR < 30 (p = 0.023). Mortality at 7 years was significantly increased in patients with eGFR < 30 mL/min/1.73m2 (p < 0.001). Multivariable regression analysis of 7-year all-cause mortality indicated an eGFR of 15 mL/min/1.73m2 (HR 4.03, 95% CI 2.54-6.40) and 30 mL/min/1.73m2 (HR 2.17 95% CI 1.55-3.05) were predictive of increased mortality. Reduced eGFR predicted the development of postoperative sepsis (p = 0.002), but not other morbidities. Positive cardiac remodeling of the left ventricle, left atrium, and valve gradients were identified postoperatively for patients with eGFR > 30 mL/min/1.73m2 while patients with eGFR < 30 mL/min/1.73m2 did not experience the same changes. CONCLUSIONS: CKD is predictive of inferior clinical and echocardiographic outcomes in patients undergoing MVR and consequently requires careful preoperative consideration and planning. Further investigation into optimizing the postoperative outcomes of this patient population is necessary.