Search Results (46)

Coronary artery bypass grafting is frequently performed in combination with valve surgery; however, minimally invasive approaches for such combined procedures remain limited due to challenges in exposure and access. While bilateral minimally invasive strategies have been described in selected cases, standardized access concepts for concomitant procedures are not well defined. This study aimed to assess the anatomical accessibility and procedural workflow of a minimally invasive biaxillary access strategy for combined coronary and valve surgery in a human cadaver model. Combined coronary artery bypass grafting and valve procedures were performed in nine Thiel/ethanol-fixed human cadavers using a biaxillary access approach. Anatomical exposure, conduit length, graft harvesting and anastomosis times, and valve positioning were evaluated by macroscopic inspection and postprocedural three-dimensional computed tomography imaging. All planned procedural steps were completed in all nine cadavers. The mean left and right internal thoracic artery lengths were 18.1 ± 1.8 cm and 18.9 ± 1.9 cm, respectively. The average bilateral internal thoracic artery harvest and anastomosis times were 52.0 ± 17.6 min and 46.6 ± 12.6 min, respectively. Postprocedural three-dimensional computed tomography imaging and macroscopic inspection demonstrated consistent graft positioning and anatomical valve seating across all specimens. This cadaveric study demonstrates that a minimally invasive biaxillary access strategy allows anatomical exposure and supports a conceptual procedural workflow for combined coronary and valve interventions. These findings represent an early-stage technical proof-of-concept and require further validation before clinical application can be considered. Full article

Postoperative pleural effusion (PE) is a common finding after endoscopic-assisted, minimally invasive coronary bypass surgery (Endo-CAB). This study evaluated its postoperative course, defined a threshold for clinically significant PE, and identified associated risk factors. Between May 2021 and January 2026, 727 patients were retrospectively analyzed. A total of 3141 postoperative chest X-rays obtained during hospitalization and follow-up were reviewed to quantify PE. Clinically significant PE was defined as ≥25% on radiographic assessment. Baseline characteristics and postoperative outcomes were analyzed, and logistic regression was used to identify independent risk factors. All patients received oral diuretics for two weeks after discharge as standard protocol. PE occurred in 86.1% of patients, typically developing within the first two postoperative days, with a median maximum of 13% [5–21%]. By the third postoperative week, PE had resolved to 0% [0–0%] in most cases. Adjustment of diuretic therapy was required in 18.3%, while 5.1% underwent thoracocentesis. Clinically significant PE occurred in 15.4% and was associated with longer hospital stay and increased blood transfusion rates. Independent risk factors included age, body mass index, continuation of dual antiplatelet therapy, and blood transfusion. Overall, PE is frequent but usually self-limiting after Endo-CAB. Full article

Background: No consensus guideline exists for double-lumen tube (DLT) size selection, which conventionally relies on height, sex, and chest radiography. Computed tomography (CT) has been proposed to refine sizing, particularly in women and patients of small stature. We examined whether high-resolution CT (HRCT) measurement of the trachea and main bronchi improves DLT size selection beyond a height- and sex-based estimate in patients undergoing minimally invasive coronary artery bypass (MICS-CABG). The aim of this study was to determine whether HRCT measurement of the trachea and main bronchi improves DLT size selection beyond a height- and sex-based estimate in patients undergoing MICS-CABG. Methods: A total of 140 patients were retrospectively analyzed who had undergone MICS-CABG and had HRCT within 30 days of surgery. Tracheal anteroposterior and transverse diameters and left and right main bronchus diameters were measured in lung, mediastinal, and bronchial windows (mean of six readings by two observers). The DLT size used was related to each parameter through Spearman correlation; the agreement between the height/sex estimate and the size used was determined using Cohen’s kappa; discrimination for a larger tube (≥39 Fr) was evaluated through receiver operating characteristic analysis; and the incremental value of imaging was assessed using leave-one-out cross-validation. Results: In total, 82.1% of patients were male (mean age 59.7 ± 10 years; height 171.7 ± 7.3 cm). The height- and sex-based estimates correlated most strongly with the size used (ρ = 0.885, p < 0.001), followed by height alone (ρ = 0.844, p < 0.001); the best imaging measure, the lung-window left main bronchus diameter, was weaker (ρ = 0.503, p < 0.001), and body mass index showed no association (ρ = −0.008, p = 0.926). The estimate matched the size used exactly in 85.7% of patients and was within one size for all patients (linear-weighted κ = 0.831). Height best discriminated a larger tube (AUC = 0.969). Adding the bronchial diameter to height and sex did not improve cross-validated prediction (exact match 80.7% with and without; AUC 0.972 versus 0.973). The mediastinal window yielded systematically larger calibers than the lung and bronchial windows. Conclusions: HRCT airway measurement did not improve the prediction of the double-lumen tube size selected in routine practice beyond a simple height- and sex-based formula. Because the reference standard was the size clinicians actually placed rather than an independently validated optimum, these data argue against routine preoperative HRCT undertaken solely to predict tube size; they do not exclude a benefit of HRCT when selection is judged against clinical outcomes. CT remains valuable when abnormal airway anatomy is suspected. Full article

Total coronary revascularization via anterior thoracotomy (TCRAT) enables complete anatomical revascularization without sternotomy; however, data on its impact on left ventricular function remain limited. This study compared left ventricular functional outcomes between TCRAT and median sternotomy coronary artery bypass grafting (MS-CABG) in 554 patients undergoing elective isolated CABG at four centers (January 2020–January 2025) with preoperative and ≥3-month follow-up echocardiography. Patients were grouped as TCRAT (n = 241) or MS-CABG (n = 313). Stabilized inverse probability of treatment weighting was applied to reduce selection bias, achieving adequate covariate balance (all standardized mean differences < 0.10). The primary endpoint was follow-up left ventricular ejection fraction, assessed using IPTW-weighted analysis of covariance adjusted for preoperative values. No significant difference was observed between groups (β = 0.13; 95% CI, −0.63 to 0.90; p = 0.734). Adjusted left ventricular end-diastolic diameter was modestly higher in the MS-CABG group (β = 0.57 mm; 95% CI, 0.17–0.98; p = 0.006), while end-systolic diameter was similar. TCRAT was associated with longer operative times but shorter intensive care unit and hospital stays, along with lower transfusion requirements. These findings suggest that there was no statistically significant difference in follow-up systolic function between the surgical approaches. Although a modest difference in LVEDD was identified, its clinical significance remains uncertain. Full article

Background and Objectives: Overt perioperative stroke remains a feared complication of adult cardiac surgery. Diffusion-weighted magnetic resonance imaging (DWI-MRI) has revealed a more prevalent form of cerebral injury, termed silent stroke or silent brain injury (SBI). Covert ischemic lesions occur without focal neurological deficits but are increasingly associated with postoperative delirium, cognitive decline, and elevated long-term cerebrovascular risk. Despite growing recognition, the true burden, mechanisms, and clinical relevance of SBI remain incompletely integrated into perioperative practice. Materials and Methods: We performed a narrative review of the literature published between January 2000 and December 2025, identified through PubMed/MEDLINE and Scopus. Eligible studies included prospective and retrospective cohorts, randomized trials, systematic reviews, and meta-analyses involving adult patients undergoing coronary artery bypass grafting, valve surgery, or minimally invasive cardiac procedures, with or without cardiopulmonary bypass, and reporting MRI-detected ischemic lesions or validated surrogate markers of cerebral injury. Pediatric studies, transcatheter interventions, case reports, and non-English publications were excluded. Sixty studies met the inclusion criteria. Results: Silent stroke occurred more frequently than clinically apparent stroke, with new DWI-MRI lesions detected in approximately 20–60% of patients following cardiac surgery. Lesions were typically small, multifocal, and embolic in distribution, predominantly affecting cortical and watershed regions. Cardiopulmonary bypass-related factors, including aortic manipulation, cerebral microembolization, hemodilution, hypoperfusion, and impaired oxygen delivery, emerged as key contributors. Several studies demonstrated associations between SBI burden and postoperative delirium, early cognitive dysfunction, and functional decline. Perfusion-based neuroprotective strategies showed mechanistic benefit, although no single intervention conclusively prevented SBI. Conclusions: Silent stroke represents the most frequent form of neurological injury in adult cardiac surgery. Evidence suggests that these covert lesions reflect clinically meaningful cerebral injury, with potential short- and long-term consequences. Recognition of silent stroke as a relevant neurological endpoint supports a shift toward multimodal, perfusion-driven neuroprotective strategies and the routine incorporation of MRI-based outcomes in future cardiac surgical research. Full article

Introduction: Artificial intelligence (AI) and robot-assisted platforms are increasingly influencing cardiothoracic surgery. AI enhances risk prediction, imaging interpretation, and early complication detection, while robotics improves visualization, dexterity, and minimally invasive access. This systematic review evaluates the current evidence supporting these technologies and their implications for clinical practice. Methods: A systematic literature search was conducted across PubMed, Embase, Scopus, Web of Science, and Google Scholar (January 2000–May 2025) following PRISMA 2020 guidelines. After screening and eligibility assessment, 67 studies met predefined inclusion criteria and were incorporated into the qualitative synthesis. Additional high-impact reviews and consensus documents were consulted for contextual interpretation. Results: Machine learning models demonstrated modest but consistent improvements in predictive performance compared with EuroSCORE II and STS scores, particularly in high-risk cohorts. Robot-assisted mitral and coronary procedures showed reduced postoperative pain, blood loss, ICU stay, and recovery time in experienced centers, though early learning phases were associated with longer operative, cross-clamp, and bypass times. AI-enabled intraoperative tools, such as video analysis, workflow recognition, and real-time anatomical segmentation, emerged as promising adjuncts for surgical precision. Structured robotic training programs, especially simulation-based and dual-console pathways, accelerated proficiency acquisition. Conclusions: AI and robotic systems act as augmentative technologies that enhance rather than replace the surgeon’s role. Their safe and effective adoption requires standardized training, transparent AI decision pathways, and clear ethical and medico-legal governance. Full article

Off-pump coronary artery bypass grafting (OPCAB) represents one of the most significant technical innovations in contemporary cardiac surgery. Developed as an alternative to conventional on-pump coronary artery bypass grafting (ONCAB), OPCAB avoids cardiopulmonary bypass and its associated systemic inflammatory response, aiming to reduce perioperative morbidity and improve recovery. Over the past three decades, advances in stabilization devices, intracoronary shunts, anesthetic management, and surgical training have refined the procedure, making it safer and more reproducible. Despite these developments, OPCAB adoption remains inconsistent worldwide, reflecting ongoing debate about its relative benefits and limitations. Evidence from randomized controlled trials, meta-analyses, and large registries suggests that OPCAB achieves comparable early mortality to ONCAB, with potential advantages in reducing renal dysfunction, neurocognitive decline, and perioperative bleeding. These benefits appear most pronounced in high-risk subgroups, including elderly patients and those with significant comorbidities. However, concerns persist regarding long-term graft patency, completeness of revascularization, and variability in outcomes depending on surgeon experience and institutional expertise. Cost-effectiveness analyses have suggested potential resource savings, but these are offset by training requirements and the technical complexity of the procedure. Global practice variation highlights the influence of surgical culture, guideline ambiguity, and institutional resources. Barriers to universal adoption include technical challenges, inconsistent long-term outcomes, and limited exposure in training programs. In the future, robotic and minimally invasive OPCAB, as well as hybrid revascularization strategies, may expand its role. This review synthesizes current evidence, explores barriers to widespread implementation, and outlines future directions for integrating OPCAB into balanced, evidence-based clinical practice. Full article

Minimally Invasive Cardiac Surgery (MICS) was developed in the late 1990s and has taken giant strides over the last 30 years. Nowadays, it is an important part of the cardiac surgery practice, accounting for one-third of total heart surgeries globally, with remarkable results. It is mostly performed for Mitral Valve repair but also for Aortic Valve Replacement and coronary artery bypass. However, the chronological evolution that led MICS to its current status has never been properly described. The best format to share a historical journey is the state-of-the-art (SotA) review. To the best of our knowledge, there are no orthodox SotA reviews on MICS. The aim of our study is to describe the current key MICS techniques, their historical development, and to discuss their role in the future of our specialty. Full article

Total Coronary Revascularization via left Anterior Thoracotomy (TCRAT) represents a modern evolution of sternum-sparing, on-pump multivessel coronary artery bypass grafting. In this review, we will summarize the historical development, detail the surgical principles, and provide a comprehensive overview of the clinical outcomes of TCRAT. The technique combines cardiopulmonary bypass using peripheral arterial as well as venous cannulation and cardioplegic cardiac arrest using transthoracic aortic cross-clamping with surgical access through a left anterior minithoracotomy. By applying special slinging and rotational maneuvers, both a stable exposition of all coronary territories—in particular those of the right and the circumflex coronary artery—and a quiet, bloodless operating field enable complete anatomical revascularization and complex coronary surgery procedures, including all variations in multiarterial grafting in unselected patients. Data from all published clinical series were integrated, and a weighted analysis of a total of 2282 patients was performed. TCRAT proved to be very effective with regard to complete anatomical revascularization and modern grafting strategies, and it showed excellent perioperative safety in an all-comers population. Both the 30-day mortality and perioperative stroke incidence were distinctly below 1.0%. Data from mid-term follow-up, although rare so far, are promising and compare well to those of the important RCTs. The TCRAT approach eliminates sternal complications completely and accelerates recovery. As an on-pump arrested-heart surgery, TCRAT inherently permits the combination of minimally invasive multivessel CABG with a variety of other cardiac operations, mainly the combination with valve procedures. The integration of robotic and endoscopic assistance represents the next evolutionary step. With its reproducibility and broad applicability, TCRAT holds strong potential to become a standard routine technique in the field of minimally invasive cardiac surgery. Full article

Over the past three decades, cardiac surgery has undergone a deep transformation, shifting from full median sternotomy to minimally invasive (MICS) and micro-invasive techniques. These approaches aim to achieve equivalent therapeutic outcomes while reducing surgical trauma, postoperative pain, hospitalization time, and healthcare costs. Minimally invasive strategies are now widely applied to aortic and mitral valve surgery, coronary artery bypass grafting, atrial fibrillation ablation, and combined procedures. Key advancements such as sutureless prostheses, video- and robotic-assisted systems, and enhanced imaging technologies have improved surgical precision and clinical outcomes while promoting faster recovery and superior cosmetic results. Evidence from randomized trials and observational studies demonstrates that MICS provides mortality and morbidity rates comparable to conventional surgery, with additional benefits in high-risk, elderly, and frail patients. Micro-invasive transcatheter interventions, particularly transcatheter aortic valve implantation (TAVI) and transcatheter mitral repair or replacement, have further expanded therapeutic options for patients unsuitable for open-heart surgery. Their success has fostered debate not between conventional and minimally invasive surgery, but between minimally invasive and micro-invasive approaches. Hybrid procedures—combining surgical and percutaneous techniques—exemplify a multidisciplinary evolution aimed at tailoring treatment to patient-specific anatomy, comorbidities, and risk profiles. Despite clear advantages, these techniques present challenges, including a steep learning curve, increased procedural costs, and the requirement for specialized equipment and institutional expertise. Optimal patient selection based on clinical risk assessment and advanced imaging remains essential. Future directions include refinement of robotic platforms, artificial intelligence-based decision support, miniaturization of instruments, and broader validation of emerging technologies in younger and low-risk populations. Minimally and micro-invasive cardiac surgery represent a paradigm shift toward patient-centered care, offering reduced physiological burden, improved functional recovery, and long-term outcomes comparable to conventional techniques. As innovation continues, these approaches are poised to become integral to modern cardiac surgical practice. Full article

Background/Objectives: Minimally invasive coronary artery bypass grafting (MICS-CABG) offers reduced access trauma compared with conventional off-pump coronary artery bypass (OPCAB) but requires more demanding surgical and anesthetic conditions, including single-lung ventilation. Enhanced Recovery After Cardiac Surgery (ERACS) pathways—particularly those incorporating early extubation in a post-anesthesia care unit (PACU) and routine ICU bypass—may harmonize postoperative recovery across different surgical approaches. This study evaluated whether a standardized early-extubation ERACS protocol could achieve comparable short-term recovery outcomes between MICS-CABG and OPCAB. Methods: This single-center retrospective study included all adult patients who underwent off-pump MICS-CABG via mini-thoracotomy or OPCAB via sternotomy between January 2020 and December 2024 within an ERACS pathway. Propensity score matching (1:1) was applied using key demographic and clinical variables. Primary outcomes were hospital length of stay (LOS), ventilation time, and unplanned ICU transfer. Secondary outcomes included postoperative complications, transfusion requirements, pain scores, and in-hospital mortality. Results: Of 144 MICS-CABG patients, 131 met inclusion criteria and 116 were propensity-matched to 116 OPCAB patients. Operative duration was longer in MICS-CABG (238.9 ± 65 vs. 175.0 ± 48 min; p < 0.001). However, ventilation time (112.2 ± 56.9 vs. 116.9 ± 64.7 min; p = 0.59), hospital LOS (8.7 ± 4.0 vs. 8.6 ± 4.1 days; p = 0.78), and unplanned ICU transfer (0.9% vs. 2.6%; p = 0.37) were comparable. Postoperative complications, transfusion rates, pain scores, and in-hospital mortality also did not differ significantly. Conclusions: Within a structured ERACS pathway incorporating early extubation and ICU bypass, MICS-CABG and OPCAB achieved similar short-term recovery outcomes despite differences in operative complexity. These findings suggest that ERACS can provide a consistent postoperative recovery framework across both revascularization strategies. Full article

Objective: Postoperative pulmonary complications (PPCs) remain a significant source of morbidity and mortality in patients undergoing minimally invasive cardiothoracic procedures. Noninvasive ventilation (NIV) is frequently employed as adjunctive therapy to manage respiratory insufficiency. This study evaluated the implementation of prophylactic NIV immediately following extubation after minimally invasive direct coronary artery bypass (MIDCAB) surgery. Methods: A total of 454 consecutive patients undergoing MIDCAB were included. In total, 139 patients received prophylactic NIV (P-NIV)—postoperative management, 315 patients formed a historical control group treated according to the previous standard of care. Clinical outcomes assessed postoperative pulmonary complications, in-hospital mortality, and one-year survival. Results: The incidence of PPCs was significantly lower in the P-NIV group compared with the control cohort (6.5% vs. 14.9%; p = 0.012). Unadjusted analyses demonstrated a significant reduction in the odds of PPCs with P-NIV (odds ratio [OR], 0.39; 95% confidence interval [CI], 0.17–0.85). Using inverse probability of treatment weighting, prophylactic NIV was associated with an absolute reduction of 8.0 percentage points in PPC risk across the entire cohort (average treatment effect [ATE], −0.080; 95% CI, −0.136 to −0.024; z = −2.80; p = 0.005). Kaplan–Meier analysis demonstrated significantly improved one-year survival in the P-NIV group (log-rank p = 0.047). Conclusions: The implementation of prophylactic NIV following MIDCAB was associated with a greater than 50% reduction in the odds of PPCs in both unadjusted and adjusted analyses and improved one-year survival. These results support the adoption of routine prophylactic NIV in the postoperative management of patients undergoing minimally invasive coronary surgery. Full article

Background: A sternum-sparing approach of minimally invasive total coronary revascularization via left anterior thoracotomy (TCRAT) demonstrated favorable early and midterm results in unselected patients with coronary artery multivessel disease. However, safety and outcomes in elderly patients remain less well defined. Particularly in octogenarians with relevant comorbidities, data are scarce, and the role of TCRAT compared to conventional coronary artery bypass grafting (CABG) remains uncertain. This study aimed to evaluate in-hospital and midterm outcomes of TCRAT in patients aged ≥ 80 years. Method: From 11/2019 to 10/2025, CABG via left anterior minithoracotomy on cardiopulmonary bypass and cardioplegic arrest was performed as a routine procedure in 859 consecutive, nonemergency patients. Among them, 82 patients (9.5%) were octogenarians, all presenting with multivessel coronary artery disease. Results: In the group of octogenarians, mean BMI was 26.5 ± 3.1 kg/m², left ventricular ejection fraction was 49.2 ± 9.1% (range 20–55%), and mean EuroSCORE II was 5.1 ± 2.4. Comorbidities included diabetes mellitus (24.4%), chronic lung disease (7.3%), prior PCI (23.2%), and peripheral vascular disease (78.5%). The mean follow-up (100%) was 9.1 months. Left internal thoracic artery was used in 98.8% and radial artery was used in 43.9%. A mean of 3.0 ± 0.9 (range 2–5) anastomoses per patient was performed. Total operation time was 299 ± 64 min (range 164–480). In-hospital mortality was 1.2%, stroke rate was 1.2%, myocardial infarction rate was 0%, and repeat revascularization rate was 1.2%. At follow-up, all-cause mortality, myocardial infarction, repeat revascularization, and stroke were 4.9%, 0%, 2.4%, and 1.2%, respectively. The overall major adverse cardiac and cerebrovascular events rate (MACCE) was 7.3% at follow-up. Conclusion: TCRAT enables complete coronary artery revascularization in multivessel coronary artery disease without sternotomy and can be safely performed in octogenarians. Both in-hospital and midterm outcomes were favorable and comparable to reported contemporary outcomes of conventional CABG in elderly patients. Full article

Background: Minimally invasive off-pump coronary artery bypass grafting (MICS-OPCAB) offers potential advantages over conventional sternotomy, including reduced trauma and faster recovery. This study evaluates the safety and feasibility of MICS-OPCAB at our centre. Methods: We retrospectively analysed 50 consecutive MICS-OPCAB procedures performed via left anterior thoracotomy at our institution between January 2023 and June 2025. Data collected included patient demographics, operative details, and postoperative outcomes. Endpoints were 30-day mortality, conversion to sternotomy, and postoperative complications. Results: The cohort included 41 males (82%) with a mean age of 63.1 ± 8.7 years (range 40–80) and mean BMI 27.8 ± 4.3 kg/m². Comorbidities included diabetes mellitus in 26%, COPD in 12%, and chronic kidney disease in 8%. Canadian Cardiovascular Society angina classes III–IV were present in 46%. The majority of patients (64%) had single-vessel CAD while 34% had two-vessel and 2% had three-vessel involvement. The mean Logistic EuroSCORE I was 2.19 ± 1.53. Left internal mammary artery (LIMA) grafting was performed in 96% of cases. Additional conduits included left radial artery in 32% and saphenous vein in 8%, with T-grafts in 26% and sequential grafting in 4%. The average number of grafts per patient was 1.35 ± 0.53 (range 1–3). The procedure was performed off-pump in 96% of cases, with two patients (4%) requiring CPB support during conversion from mini-thoracotomy. The overall conversion rate to sternotomy was 16% (eight patients), predominantly due to difficult or injurious IMA harvest or anatomical limitations. The mean operative time was 197.8 ± 76.8 min and decreased significantly after the first 25 cases (220 min vs. 175 min). Atrial fibrillation occurred in 18%, pleural effusion in 28% (10% requiring drainage), and chest infection in 8%. Wound complications arose in 4%. There was no 30-day mortality. ICU stay averaged 2 ± 2.2 days (range 1–14), and total hospital stay was 5.7 ± 2.7 days where institutional coronary bypass stay is normally 7.9 +/− 7.0 days. Conclusion: These results demonstrate that MICS-OPCAB is a safe and feasible approach for selected patients requiring multivessel coronary artery bypass grafting. There are some technical challenges during the learning curve for which conversion to open surgery can confer good outcomes. Traversing the early learning curve can confer additional benefits to later patients. Full article

Background/Objectives: Minimally invasive direct coronary artery bypass (MIDCAB) surgery, performed through a left minithoracotomy, has emerged as an alternative to conventional coronary artery bypass grafting (CABG), which requires a full sternotomy. This procedure is ideal for patients with isolated proximal left anterior descending (LAD) artery disease or high surgical risk. The aim of this study was to assess the long-term clinical outcomes of MIDCAB performed at a single center with stratification by revascularization strategy. Methods: A total of 480 patients who underwent off-pump MIDCAB between 2012 and 2024 at a single center were retrospectively analyzed and categorized into three distinct groups: complete revascularization (MIDCAB-CR), hybrid coronary revascularization (MIDCAB-HCR) and incomplete revascularization (MIDCAB-IR). Short- and long-term outcomes, including mortality, major adverse cardiac and cerebral events (MACCE) and LITA–LAD graft patency were evaluated. Median follow-up was 3.39 years. Results: In-hospital mortality was 1.4%. At a median follow-up duration of 3.39 years, the overall LITA–LAD graft patency was 94.4% with 5- and 10-year survival rates of 78% and 60%, respectively. MIDCAB-CR and MIDCAB-HCR groups showed comparable long-term survival and freedom from MACCE, both significantly better than those observed in the MIDCAB-IR groups. Conclusions: These findings support the safety and durability of MIDCAB as an effective revascularization strategy, especially when performed as complete or hybrid revascularization. Incomplete revascularization may be considered in selected high-risk patients but is associated with worse outcomes. Full article