Direct relationship between transvalvular velocity and cardiac dysfunction, morbidity, and mortality in patients with aortic stenosis.

OBJECTIVE: Current guidelines recommend intervention in subjects with severe symptomatic aortic stenosis (AS), even though any degree of AS is associated with a higher risk of mortality. We investigated the association between the degree of AS, delineated by transvalvular flow velocity, and patient morbidity and mortality. METHODS: Medically managed patients aged 40-95 years with maximum flow velocity (Vmax ) by echocardiography between 2013 and 2018 were stratified into five groups (A-E) based on the 75th, 90th, 97.5th, and the 99th percentiles of Vmax distribution. Patient characteristics, cardiac structural changes, and end-organ disease were compared using Kruskal-Wallis and Cochran-Armitage tests. Mortality over a median of 2.8 (1.52-4.8) years was compared using Kaplan-Meier curves and risk estimates were derived from the Cox model. RESULTS: The Vmax was reported in 37,131 patients. There was a steady increase (from Group A towards E) in age, Caucasian race, structural cardiac changes, end-organ morbidities, and all-cause mortality. In reference to Group A, there as an increased risk of mortality in Groups B (hazard ratio [HR] = 1.3; confidence interval [CI]: 1.2-1.35; p < .0001), C (HR = 1.5; CI: 1.4-1.6; p < .0001), and D (HR = 1.8; CI: 1.6-2; p < .0001), with an exponential increase in Group E (HR = 2.5; CI: 2.2-2.8; p < .0001). CONCLUSIONS: A direct, strong correlation exists between the degree of AS and cardiac structural changes and mortality. Patients with Vmax ≥ 97.5th percentile (≥3.2 m/s) might benefit from early intervention.

Bidirectional transfer of Anelloviridae lineages between graft and host during lung transplantation.

Solid organ transplantation disrupts virus-host relationships, potentially resulting in viral transfer from donor to recipient, reactivation of latent viruses, and new viral infections. Viral transfer, colonization, and reactivation are typically monitored using assays for specific viruses, leaving the behavior of full viral populations (the "virome") understudied. Here we sought to investigate the temporal behavior of viruses from donor lungs and transplant recipients comprehensively. We interrogated the bronchoalveolar lavage and blood viromes during the peritransplant period and 6-16 months posttransplant in 13 donor-recipient pairs using shotgun metagenomic sequencing. Anelloviridae, ubiquitous human commensal viruses, were the most abundant human viruses identified. Herpesviruses, parvoviruses, polyomaviruses, and bacteriophages were also detected. Anelloviridae populations were complex, with some donor organs and hosts harboring multiple contemporaneous lineages. We identified transfer of Anelloviridae lineages from donor organ to recipient serum in 4 of 7 cases that could be queried, and immigration of lineages from recipient serum into the allograft in 6 of 10 such cases. Thus, metagenomic analyses revealed that viral populations move between graft and host in both directions, showing that organ transplantation involves implantation of both the allograft and commensal viral communities.

Venovenous Extracorporeal Membrane Oxygenation for Patients With Return of Spontaneous Circulation After Cardiac Arrest Owing to Acute Respiratory Distress Syndrome.

OBJECTIVE: The primary objective of this study was to determine the survival to hospital discharge of patients who were treated with venovenous (VV) extracorporeal membrane oxygenation (ECMO) for respiratory failure after cardiac arrest. DESIGN: Retrospective chart review. SETTING: University-affiliated tertiary care hospitals. PARTICIPANTS: The study comprised 21 patients. INTERVENTIONS: Implementation of VV ECMO in patients with return of spontaneous circulation after cardiac arrest owing to respiratory insufficiency. MEASUREMENTS AND MAIN RESULTS: The most common etiology of arrest was pneumonia-associated acute respiratory distress syndrome (8/21 [38%]). Overall, 12/21(57%) patients survived to hospital discharge. Two of 12 (17%) patients required hemodialysis upon discharge. CONCLUSION: VV ECMO may be an appropriate alternative to venoarterial ECMO in select patients with return of spontaneous circulation after cardiac arrest owing to profound respiratory failure.

Concomitant antegrade stent grafting of the descending thoracic aorta during transverse hemiarch reconstruction for acute DeBakey I aortic dissection repair improves aortic remodeling.

BACKGROUND AND AIM: Concomitant endovascular stent grafting of the descending thoracic aorta during open repair for acute DeBakey I aortic dissection can be performed in patients with extensive dissection and malperfusion. We analyzed the effects of this strategy on distal aortic remodeling. METHODS: From 2006-2014, acute DeBakey I dissection patients without primary aortic arch tear undergoing open distal hemiarch reconstruction (Standard group) versus those undergoing hemiarch with descending thoracic aorta (DTA) thoracic endovascular aortic repair (TEVAR group) were retrospectively reviewed. We studied aortic remodeling only in patients with three-dimensional computed tomography scans available at 1 and 12 months following surgery (Standard group n = 26; Stent group n = 21). RESULTS: At 1 month, abdominal aortic diameters were similar, but true lumen (TL) and true lumen to total diameter ratios (TL index [TLI]) in the DTA were significantly improved in the TEVAR group (P < 0.05). Mean number of fenestrations were similar (1.8 ± 1.5 vs. 2.4 ± 1.9, P = 0.32). At 12 months, DTA true lumen and TLI remained significantly improved in the TEVAR group at all locations (P < 0.01). This translated to increased complete false lumen thrombosis rates in the thoracic aorta (83% vs. 32%, P = 0.01) in the TEVAR group. In the Standard group, DTA true lumen diameter and TL index were significantly decreased at 12 months compared to 1 month time period (P < 0.05). In the TEVAR group, DTA true lumen diameters and TLI were significantly improved at 12 months (P < 0.05). CONCLUSIONS: Antegrade TEVAR during open repair for DeBakey I dissection improves DTA remodeling by increasing true lumen diameter without enlargement of the total aortic diameter and by promoting false lumen thrombosis.

Type A aortic dissection in Marfan syndrome: extent of initial surgery determines long-term outcome.

BACKGROUND: Data on outcomes after Stanford type A aortic dissection in patients with Marfan syndrome are limited. We investigated the primary surgery and long-term results in patients with Marfan syndrome who suffered aortic dissection. METHODS AND RESULTS: Among 1324 consecutive patients with aortic dissection type A, 74 with Marfan syndrome (58% men; median age, 37 years [first and third quartiles, 29 and 48 years]) underwent surgical repair (85% acute dissections; 68% DeBakey I; 55% composite valved graft, 30% supracoronary ascending replacement, 15% valve-sparing aortic root replacement; 12% total arch replacement; 3% in-hospital mortality) at 2 tertiary centers in the United States and Europe over the past 25 years. The rate of aortic reintervention with resternotomy was 24% (18 of 74) and of descending aorta (thoracic+abdominal) intervention was 30% (22 of 74) at a median follow-up of 8.4 years (first and third quartiles, 2.2 and 12.7 years). Freedom from need for aortic root reoperation in patients who underwent primarily a composite valved graft or valve-sparing aortic root replacement procedure was 95±3%, 88±5%, and 79±5% and in patients who underwent supracoronary ascending replacement was 83±9%, 60±13%, 20±16% at 5, 10, and 20 years. Secondary aortic arch surgery was necessary only in patients with initial hemi-arch replacement. CONCLUSIONS: Emergency surgery for type A dissection in patients with Marfan syndrome is associated with low in-hospital mortality. Failure to extend the primary surgery to aortic root or arch repair leads to a highly complex clinical course. Aortic root replacement or repair is highly recommended because supracoronary ascending replacement is associated with a high need (>40%) for root reintervention.

Valve-sparing aortic root replacement in patients with Marfan syndrome enrolled in the National Registry of Genetically Triggered Thoracic Aortic Aneurysms and Cardiovascular Conditions.

BACKGROUND AND AIM OF THE STUDY: The long-term outcomes of aortic valve-sparing (AVS) root replacement in Marfan syndrome (MFS) patients remain uncertain. The study aim was to determine the utilization and outcomes of AVS root replacement in MFS patients enrolled in the Registry of Genetically Triggered Thoracic Aortic Aneurysms and Cardiovascular Conditions (GenTAC). METHODS: At the time of this analysis, 788 patients with MFS were enrolled in the GenTAC Registry, of whom 288 had undergone aortic root replacement. Patients who had undergone AVS procedures were compared to those who had undergone aortic valve replacement (AVR). RESULTS: AVS root replacement was performed in 43.5% of MFS patients, and the frequency of AVS was increased over the past five years. AVS patients were younger at the time of surgery (31.0 versus 36.3 years, p = 0.006) and more likely to have had elective rather than emergency surgery compared to AVR patients, in whom aortic valve dysfunction and aortic dissection was the more likely primary indication for surgery. After a mean follow up of 6.2 +/- 3.6 years, none of the 87 AVS patients had required reoperation; in contrast, after a mean follow up of 10.5 +/- 7.6 years, 11.5% of AVR patients required aortic root reoperation. Aortic valve function has been durable, with 95.8% of AVS patients having aortic insufficiency that was graded as mild or less. CONCLUSION: AVS root replacement is performed commonly among the MFS population, and the durability of the aortic repair and aortic valve function have been excellent to date. These results justify a continued use of the procedure in an elective setting. The GenTAC Registry will be a useful resource to assess the long-term durability of AVS root replacement in the future.

Development of a single endovascular device for aortic valve replacement and ascending aortic repair.

BACKGROUND AND AIM OF THE STUDY: Transcatheter aortic valve implantation (TAVI) is contraindicated in the presence of an ascending aortic aneurysm. Our aim was to design a composite endovascular device enabling ascending aortic repair and TAVI. METHODS: From 2007 to 2013, among 1196 patients with severe aortic stenosis screened for TAVI, 79 nonbicuspid patients had ascending aortic diameter >45 mm. Proximal aortic geometry was assessed in those with computed tomography angiography. RESULTS: All together, 51 patients (35 males, aged 85 ± 8 years; 19 TAVI, 10 open Wheat procedures, 22 managed conservatively) were included. The required annular diameter for implantation of currently available TAVI prostheses was met in 41% (21/51). Novel prosthetic valves appropriate for annular range up to 30 mm would extend device applicability to 78% (40/51). Proximal and distal diameters of the graft-covering portion ranging between 30 and 46 mm would enable 10% graft oversizing in all but six patients. In 88% (45/51) the required minimum 10 mm distance between aortic valve annulus and coronary artery ostia was found. Mean distance between left and right coronary artery ostia and sinotubular junction was 2.6 ± 1.5 and 3.2 ± 1.7 mm, respectively. CONCLUSIONS: Novel composite endovascular valved grafts may extend the application of transcatheter techniques to patients denied TAVI due to a concomitant ascending aneurysm. The location of coronary arteries in relation to the sinotubular junction must be addressed in designing these composite valve grafts.

2022: Perioperative and critical care year in review for the cardiothoracic surgery team.

This year, we have again assembled an expert opinion on several key topics that pertain to the perioperative and critical care management of the cardiac surgery patient and for patients requiring extracorporeal membrane oxygenation. Approximately 1 in 3 patients undergoing cardiac surgery have diabetes mellitus; contemporary glycemic control management of these patients to minimize perioperative complications are reviewed. Goal directed fluid therapy remains an area on interest and controversy; the use of albumin as a resuscitation fluid and recent clinical trial data is reviewed. Delirium is characterized as an acute confusional state occurring in 20-25% of patients after cardiac surgery. Insights on integrating the whole interdisciplinary team, including the family, with the DELirium Team Approach (DELTA) program are discussed. Optimal management for refractory hypoxemia with venovenous extracorporeal membrane oxygenation (VV-ECMO) and the role of prone positioning remain a question. Data supporting this technique during VV-ECMO is reviewed-lastly, the contemporary management and supporting evidence for refractory postoperative vasoplegic shock after cardiopulmonary bypass is provided.

Gender Representation Trends in Cardiothoracic Surgery Journal Editorial Boards.

OBJECTIVE: We aimed to characterize chronologic trends of gender composition of major cardiothoracic surgery journal editorial boards in the current era. METHODS: A cross-sectional analysis was performed of gender representation in editorial board members of two North American cardiothoracic surgery journals from 2008 to 2023. Member names and roles were collected from available monthly issues. Validated software programming was used to classify gender. The annual proportion of women representation was compared to the thoracic surgery workforce. RESULTS: During the study period, 558 individuals (3,641 names) were identified, 14.3% of whom were women. The total number of editorial board women increased for both journals. The proportion of women also increased from 2.5% (3/118) in 2008 to 17.8% (71/399) in 2023 (P < .001), exceeding the percentage of women in the thoracic surgery workforce which increased from 3.8% in 2007 to 8.3% in 2021 (P < .001). The average duration of participation was longer for men than for women (53.8 vs 44.5 months, P = .01). Women in editorial board senior roles also increased from 3.3% (1/30) in 2008 to 28.6% (42/147) in 2023 (P < .001), almost triple the increase in non-designated roles from 2.3% (2/88) in 2008 to 11.5% (29/252) in 2023 (P < .001). CONCLUSIONS: In recent years, the appointment of women to high-impact cardiothoracic surgery journal editorial boards and senior roles have proportionally exceeded the overall representation of women in cardiothoracic surgery. These findings indicate progress in inclusive efforts and offer insight towards reducing academic gender disparities.

Living in disadvantaged neighborhoods linked to less intervention for severe aortic stenosis.

To investigate the association between area deprivation index (ADI) and aortic valve replacement (AVR) in patients with severe aortic stenosis (AS). Patients aged 40-95 years with severe AS confirmed by echocardiography were included. The 9-digit zip code of patient residence address was used to identify the ADI ranking, based on which patients were divided into 5 groups (with Group E being most deprived). The rates of AV intervention were compared among 5 groups using competing risks analysis, with death as a competing event. We included 1751 patients with severe AS from 2013 to 2018 followed for a median 2.8 (interquartile range, 1.5-4.8) years. The more distressed ADI groups tended to be younger (P = 0.002), female (P < 0.001), and of African American race (P < 0.001), have higher presentation of sepsis (P = 0.031), arrhythmia (P = 0.022), less likely to have previous diagnosis of AS (P < 0.001); and were less likely to undergo AVR (52.5% vs 46.9% vs 46.1% vs 48.9% vs 39.7%, P = 0.023). Using competing risk analysis, the highest ADI group (E) were the least and the lowest ADI group (A) the most likely to undergo AVR (Gray's test, P = 0.025). The association between ADI ranking and AVR rates was influenced by sex and race. Within group analysis, there was significant association between race and AVR (Gray's test, P < 0.001), and between sex and AVR (Gray's test, P < 0.001). Patients with severe AS living in more deprived neighborhoods were less likely to undergo aortic valve interventions, which was influenced by female gender, and African American race.

Exeporfinium chloride (XF-73) nasal gel dosed over 24 hours prior to surgery significantly reduced Staphylococcus aureus nasal carriage in cardiac surgery patients: Safety and efficacy results from a randomized placebo-controlled phase 2 study.

We studied 83 cardiac-surgery patients with nasal S. aureus carriage who received 4 intranasal administrations of XF-73 nasal gel or placebo <24 hours before surgery. One hour before surgery, patients exhibited a S. aureus nasal carriage reduction of 2.5 log10 with XF-73 compared to 0.4 log10 CFU/mL for those who received placebo (95% CI, -2.7 to -1.5; P < .0001).

ECMO During COVID-19: A Society of Thoracic Surgeons/Extracorporeal Life Support Organization Survey.

Background: The Society of Thoracic Surgeons Workforce on Critical Care and the Extracorporeal Life Support Organization sought to identify how the coronavirus disease 2019 (COVID-19) pandemic has changed the practice of venoarterial (VA) and venovenous (VV) extracorporeal membrane oxygenation (ECMO) programs across North America. Methods: A 26-question survey covering 6 categories (ECMO initiation, cannulation, management, anticoagulation, triage/protocols, and credentialing) was emailed to 276 North American Extracorporeal Life Support Organization centers. ECMO practices before and during the COVID-19 pandemic were compared. Results: Responses were received from 93 (34%) programs. The percentage of high-volume (>20 cases per year) VV ECMO programs increased during the pandemic from 29% to 41% (P < .001), as did institutions requiring multiple clinicians for determining initiation of ECMO (VV ECMO, 25% to 43% [P = .001]; VA ECMO, 20% to 32% [P = .012]). During the pandemic, more institutions developed their own protocols for resource allocation (23% before to 51%; P < .001), and more programs created sharing arrangements to triage patients and equipment with other centers (31% to 57%; P < .001). Direct thrombin inhibitor use increased for both VA ECMO (13% to 18%; P = .025) and VV ECMO (12% to 24%; P = .005). Although cardiothoracic surgeons remained the primary cannulating proceduralists, VV ECMO cannulations performed by pulmonary and critical care physicians increased (13% to 17%; P = .046). Conclusions: The Society of Thoracic Surgeons/Extracorporeal Life Support Organization collaborative survey indicated that the pandemic has affected ECMO practice. Further research on these ECMO strategies and lessons learned during the COVID-19 pandemic may be useful in future global situations.

Patterns of Surveillance Imaging for Incidentally Detected Ascending Aortic Aneurysms.

BACKGROUND: Ascending aortic aneurysms (AsAA) remain a silent killer for which timely intervention and surveillance intervals are critical. Despite this, little is known about the follow-up care patients receive after incidental detection of an AsAA. We examined the pattern of surveillance and follow-up care for these high-risk patients. METHODS: We identified patients at our institution with incidentally detected AsAAs (≥37 mm) between 2013 and 2016. We collected information on patients' aneurysms and clinical follow-up. Logistic regression models related aneurysm size and demographics to whether patients received follow-up imaging or referral. RESULTS: From 2013 to 2016, 261 patients were identified to have incidentally detected AsAAs among the 21,336 computed tomography scans performed at our institution. The median aneurysm size was 4.2 cm (interquartile range, 4 to 4.4). Only 18 (6.9%) of the identified patients were referred to a cardiac surgeon for evaluation, and only 37.9% of the identified patients had a follow-up chest computed tomography scan within 1 year of detection; 34% had an echocardiogram. The median follow-up duration for the study was 5 years. Logistic regression models showed that aneurysm size and family history were significant predictors of whether a patient was referred to a cardiac surgeon (odds ratio 10.34; 95% confidence interval, 2.3 to 47.9), but not whether the patients received follow-up imaging. CONCLUSIONS: Among 261 patients with incidentally detected AsAAs, only a third received any follow-up imaging within 1 year after detection, with very low clinical penetrance for expert referral. Surveillance of this high-risk patient population appears insufficient and may require standardization.

One and Five-Year Mortality Risk Prediction in Patients with Moderate and Severe Aortic Stenosis.

(1) Background: Our goal was to develop a risk prediction model for mortality in patients with moderate and severe aortic stenosis (AS). (2) Methods: All patients aged 40−95 years, with echocardiographic evidence of moderate and severe AS at a single institution, were studied over a median of 2.8 (1.5−4.8) years, between 2013−2018. Patient characteristics and mortality were compared using Chi-squares, t-tests, and Kaplan−Meier (KM) curves, as appropriate. The risk calculation for mortality was derived using the Cox proportional hazards model. A risk score was calculated for each parameter, and the total sum of scores predicted the individualized risks of 1-and 5-year mortality. (3) Results: A total of 1991 patients with severe and 2212 with moderate AS were included. Severe AS patients were older, had a lower ejection fraction %, were more likely to be Caucasian, and had lower rates of obesity and smoking, but had higher rates of cardiac comorbidities and AVR (49.3% vs. 2.8%, p < 0.0001). The unadjusted overall mortality was 41.7% vs. 41%, p = 0.6530, and was not different using KM curves (log rank, p = 0.0853). The models included only patients with complete follow-up (3966 in the 1-year, and 816 in the 5-year model) and included 13 variables related to patient characteristics, degree of AS, and AVR. The C-statistic was 0.75 and 0.72 for the 1-year and the 5-year models, respectively. (4) Conclusions: Patients with moderate and severe AS experience high morbidity and mortality. The usage of a risk prediction model may provide guidance for clinical decision making in complex patients.

Midterm outcomes and durability of sinus segment preservation compared with root replacement for acute type A aortic dissection.

OBJECTIVE: The durability of root repair for acute type A aortic dissection is not well studied in the context of aortic insufficiency and stability of the sinuses of Valsalva. We compared clinical and functional outcomes in patients undergoing root repair and replacement for acute type A aortic dissection. METHODS: Of 716 patients undergoing surgery for acute type A aortic dissection, 585 (81.7%) underwent root repair and 131 (18.3%) underwent root replacement. Survival, cumulative incidence of reoperation, aortic insufficiency, and sinuses of Valsalva dilation were compared between the 2 groups. RESULTS: Survival at 1, 5, and 10 years was 84.1% versus 77.3%, 70.8% versus 69.2%, 57.6% versus 58.0% in the root repair and replacement groups, respectively (P = .69). Cumulative incidence of reoperation at 1, 5, and 10 years was 0.0% versus 0.8%, 1.4% versus 3.8%, and 3.4% versus 8.6% in the root repair and root replacement groups, respectively (P = .011). Multivariable Cox regression identified sinuses of Valsalva diameter 45 mm or more as a risk factor for proximal aortic reoperation (hazard ratio, 9.06; 95% confidence interval, 1.26-65.24). In a repeated-measures, linear, mixed-effects model, root replacement was associated with smaller follow-up of sinuses of Valsalva dimensions (ß = -0.66, P < .001). In an ordinal longitudinal mixed model, root replacement was associated with lower severity of postoperative aortic insufficiency (ß = -3.10, P < .001). CONCLUSIONS: Survival is similar, but the incidence of aortic insufficiency and root dilation may be greater after root repair compared with root replacement for acute type A aortic dissection.

Midterm outcomes of emergency surgery for acute type A aortic dissection in octogenarians.

OBJECTIVE: The incidence of elderly patients with acute type A aortic dissection is increasing. A recent analysis of the International Registry of Acute Aortic Dissection failed to show a mortality benefit with surgery compared with medical management in octogenarians. Therefore, we compared our institutional outcomes of emergency surgery for acute type A aortic dissection in octogenarians versus septuagenarians to understand the outcomes of surgical intervention in elderly patients. METHODS: From 2002 to 2017, 70 octogenarians (aged ≥80 years) and 165 septuagenarians (70-79 years) underwent surgery for acute type A aortic dissection (N = 235, total). Quality of life was assessed by the RAND Short Form-36 quality of life survey. Midterm clinical and functional data were obtained retrospectively. RESULTS: At baseline, septuagenarians had a higher prevalence of diabetes (20.6% vs 5.7%, P = .01). The prevalence of cardiopulmonary resuscitation was 4.8% versus 10.0% (P = .24) in septuagenarians and octogenarians. The prevalence of cardiogenic shock was 18.2% versus 27.1% (P = .17). Thirty-day/in-hospital mortality was 21.2% versus 28.6% (P = .29). Multivariable logistic regression identified cardiogenic shock as an independent risk factor for in-hospital mortality (odds ratio, 10.07; 95% confidence interval, 2.30-44.03) in octogenarians. Survival at 5 years was 49.7% (42.1%-58.6%) versus 34.2% (23.9%-48.8%) in septuagenarians and octogenarians, respectively. Responses to the quality of life survey were no different between septuagenarians and octogenarians across all 8 quality of life categories. CONCLUSIONS: Clinical outcomes after surgery for acute type A aortic dissection are similar in octogenarians and septuagenarians. For discharged survivors, quality of life remains favorable and does not differ between the 2 groups.

Screening Tool to Identify Patients with Advanced Aortic Valve Stenosis.

(1) Background: The clinical burden of aortic stenosis (AS) remains high in Western countries. Yet, there are no screening algorithms for this condition. We developed a risk prediction model to guide targeted screening for patients with AS. (2) Methods: We performed a cross-sectional analysis of all echocardiographic studies performed between 2013 and 2018 at a tertiary academic care center. We included reports of unique patients aged from 40 to 95 years. A logistic regression model was fitted for the risk of moderate and severe AS, with readily available demographics and comorbidity variables. Model performance was assessed by the C-index, and its calibration was judged by a calibration plot. (3) Results: Among the 38,788 reports yielded by inclusion criteria, there were 4200 (10.8%) patients with ≥moderate AS. The multivariable model demonstrated multiple variables to be associated with AS, including age, male gender, Caucasian race, Body Mass Index ≥ 30, and cardiovascular comorbidities and medications. C-statistics of the model was 0.77 and was well calibrated according to the calibration plot. An integer point system was developed to calculate the predicted risk of ≥moderate AS, which ranged from 0.0002 to 0.7711. The lower 20% of risk was approximately 0.15 (corresponds to a score of 252), while the upper 20% of risk was about 0.60 (corresponds to a score of 332 points). (4) Conclusions: We developed a risk prediction model to predict patients' risk of having ≥moderate AS based on demographic and clinical variables from a large population cohort. This tool may guide targeted screening for patients with advanced AS in the general population.