1
|
ACR Appropriateness Criteria® Preprocedural Planning for Transcatheter Aortic Valve Replacement: 2023 Update. J Am Coll Radiol 2023; 20:S501-S512. [PMID: 38040467 DOI: 10.1016/j.jacr.2023.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 08/22/2023] [Indexed: 12/03/2023]
Abstract
This document discusses preprocedural planning for transcatheter aortic valve replacement, evaluating the imaging modalities used in initial imaging for preprocedure planning under two variants 1) Preintervention planning for transcatheter aortic valve replacement: assessment of aortic root; and 2) Preintervention planning for transcatheter aortic valve replacement: assessment of supravalvular aorta and vascular access. US echocardiography transesophageal, MRI heart function and morphology without and with IV contrast, MRI heart function and morphology without IV contrast and CT heart function and morphology with IV contrast are usually appropriate for assessment of aortic root. CTA chest with IV contrast, CTA abdomen and pelvis with IV contrast, CTA chest abdomen pelvis with IV contrast are usually appropriate for assessment of supravalvular aorta and vascular access. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision process support the systematic analysis of the medical literature from peer reviewed journals. Established methodology principles such as Grading of Recommendations Assessment, Development, and Evaluation or GRADE are adapted to evaluate the evidence. The RAND/UCLA Appropriateness Method User Manual provides the methodology to determine the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where peer reviewed literature is lacking or equivocal, experts may be the primary evidentiary source available to formulate a recommendation.
Collapse
|
2
|
Discussion. J Thorac Cardiovasc Surg 2023; 166:764-766. [PMID: 35027215 DOI: 10.1016/j.jtcvs.2021.10.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Association of STS database variables with repair durability in ischemic mitral regurgitation using machine learning. J Card Surg 2021; 37:76-83. [PMID: 34634155 DOI: 10.1111/jocs.16060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/29/2021] [Accepted: 09/09/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Machine learning (ML) can identify nonintuitive clinical variable combinations that predict clinical outcomes. To assess the potential predictive contribution of standardized Society of Thoracic Surgeons (STS) Database clinical variables, we used ML to detect their association with repair durability in ischemic mitral regurgitation (IMR) patients in a single institution study. METHODS STS Database variables (n = 53) served as predictors of repair durability in ML modeling of 224 patients who underwent surgical revascularization and mitral valve repair for IMR. Follow-up mortality and echocardiography data allowed 1-year outcome analysis in 173 patients. Supervised ML analyses were performed using recurrence (≥3+ IMR) or death versus nonrecurrence (<3+ IMR) as the binary outcome classification. RESULTS We tested standard ML and deep learning algorithms, including support vector machines, logistic regression, and deep neural networks. Following training, final models were utilized to predict class labels for the patients in the test set, producing receiver operating characteristic (ROC) curves. The three models produced similar area under the curve (AUC), and predicted class labels with promising accuracy (AUC = 0.72-0.75). CONCLUSIONS Readily-available STS Database variables have potential to play a significant role in the development of ML models to direct durable surgical therapy in IMR patients.
Collapse
|
4
|
Effect of Aortic Valve Type on Patients Who Undergo Type A Aortic Dissection Repair. Semin Thorac Cardiovasc Surg 2021; 34:479-487. [PMID: 33984483 DOI: 10.1053/j.semtcvs.2021.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 04/06/2021] [Indexed: 11/11/2022]
Abstract
Aortic valve replacement (AVR) is common in the setting of type A aortic dissection (TAAD) repair. Here, we evaluated the association between prosthesis choice and patient outcomes in an international patient cohort. We reviewed data from the International Registry of Acute Aortic Dissection (IRAD) interventional cohort to examine the relationship between valve choice and short- and mid-term patient outcomes. Between January 1996 and March 2016, 1290 surgically treated patients with TAAD were entered into the IRAD interventional cohort. Of those, 364 patients undergoing TAAD repair underwent aortic valve replacement (AVR; mean age, 57 years). The mechanical valve cohort consisted of 189 patients, of which 151 (79.9%) had a root replacement. The nonmechanical valve cohort consisted of 5 patients who received homografts and 160 patients who received a biologic AVR, with a total of 118 (71.5%) patients who underwent root replacements. The mean follow-up time was 2.92 ± 1.75 years overall (2.46 ± 1.69 years for the mechanical valve cohort and 3.48 ± 1.8 years for the nonmechanical valve cohort). After propensity matching, Kaplan-Meier estimates of 4-year survival rates after surgery were 64.8% in the mechanical valve group compared with 74.7% in the nonmechanical valve group (p = 0.921). A stratified Cox model for 4-year mortality showed no difference in hazard between valve types after adjusting for the propensity score (p = 0.854). A biologic valve is a reasonable option in patients with TAAD who require AVR. Although this option avoids the potential risks of anticoagulation, long-term follow up is necessary to assess the effect of reoperations or transcatheter interventions for structural valve degeneration.
Collapse
|
5
|
CORONARY ARTERY BYPASS GRAFTING IN HIGH-RISK MYELODYSPLASTIC SYNDROME. J Am Coll Cardiol 2019. [DOI: 10.1016/s0735-1097(19)33294-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
6
|
OUTCOMES ASSOCIATED WITH PERCUTANEOUS CORONARY INTERVENTION PRIOR TO TRANSCATHETER AORTIC VALVE IMPLANTATION. J Am Coll Cardiol 2019. [DOI: 10.1016/s0735-1097(19)31922-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
7
|
ACR Appropriateness Criteria® Imaging for Transcatheter Aortic Valve Replacement. J Am Coll Radiol 2017; 14:S449-S455. [DOI: 10.1016/j.jacr.2017.08.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 08/23/2017] [Indexed: 10/18/2022]
|
8
|
Building a collaborative culture in cardiothoracic operating rooms: pre and postintervention study protocol for evaluation of the implementation of teamSTEPPS training and the impact on perceived psychological safety. BMJ Open 2017; 7:e017389. [PMID: 28963302 PMCID: PMC5623545 DOI: 10.1136/bmjopen-2017-017389] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
INTRODUCTION The importance of effective communication, a key component of teamwork, is well recognised in the healthcare setting. Establishing a culture that encourages and empowers team members to speak openly in the cardiothoracic (CT) operating room (OR) is necessary to improve patient safety in this high-risk environment. METHODS AND ANALYSIS This study will take place at Barnes-Jewish Hospital, an academic hospital in affiliation with Washington University School of Medicine located in the USA. All team members participating in cardiac and thoracic OR cases during this 17-month study period will be identified by the primary surgical staff attending on the OR schedule.TeamSTEPPS (Team Strategies and Tools to Enhance Performance and Patient Safety) training course will be taught to all CT OR staff. Before TeamSTEPPS training, staff will respond to a 39-item questionnaire that includes constructs from the Agency for Healthcare Research and Quality Hospital Survey on Patient Safety Culture, Edmondson's 'Measure of psychological safety' questionnaire, and questionnaires on turnover intentions, job satisfaction and 'burnout'. The questionnaires will be readministered at 6 and 12 months.The primary outcomes to be assessed include the perceived psychological safety of CT OR team members, the overall effect of TeamSTEPPS on burnout and job satisfaction, and observed turnover rate among the OR nurses. As secondary outcomes, we will be assessing self-reported rates of medical error and near misses in the ORs with a questionnaire at the end of each case. ETHICS AND DISSEMINATION Ethics approval is not indicated as this project does not meet the federal definitions of research requiring the oversight of the Institutional Review Board (IRB). Patient health information (PHI) will not be generated during the implementation of this project. Results of the trial will be made accessible to the public when published in a peer-reviewed journal following the completion of the study.
Collapse
|
9
|
|
10
|
Transatlantic Editorial on transcatheter aortic valve replacement. Eur J Cardiothorac Surg 2017; 52:1-13. [PMID: 28874024 DOI: 10.1093/ejcts/ezx196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/11/2017] [Indexed: 11/14/2022] Open
|
11
|
|
12
|
Changes in operative strategy for patients enrolled in the International Registry of Acute Aortic Dissection interventional cohort program. J Thorac Cardiovasc Surg 2017; 153:S74-S79. [DOI: 10.1016/j.jtcvs.2016.12.029] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 12/12/2016] [Accepted: 12/28/2016] [Indexed: 01/12/2023]
|
13
|
TCT-679 Diabetes and Clinical Outcomes in Intermediate Risk Patients Randomized to Transcatheter Versus Surgical Aortic Valve Replacement: An Analysis of the PARTNER 2A Trial. J Am Coll Cardiol 2016. [DOI: 10.1016/j.jacc.2016.09.092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
A Randomized Evaluation of the SAPIEN XT Transcatheter Heart Valve System in Patients With Aortic Stenosis Who Are Not Candidates for Surgery. JACC Cardiovasc Interv 2016; 8:1797-806. [PMID: 26718510 DOI: 10.1016/j.jcin.2015.08.017] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 08/19/2015] [Accepted: 08/19/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVES The purpose of this study was to determine the safety and effectiveness of the SAPIEN XT versus SAPIEN systems (Edwards Lifesciences, Irvine, California) in patients with symptomatic, severe aortic stenosis (AS) who were not candidates for surgery. BACKGROUND Transcatheter aortic valve replacement (TAVR) has become the standard of care for inoperable patients with severe, symptomatic AS. In the PARTNER (Placement of Aortic Transcatheter Valves) IB trial, a reduction in all-cause mortality was observed in patients undergoing TAVR with the balloon-expandable SAPIEN transcatheter heart valve compared with standard therapy, but the SAPIEN valve was associated with adverse periprocedural complications, including vascular complications, major bleeding, and paravalvular regurgitation. The newer, low-profile SAPIEN XT system was developed to reduce these adverse events. METHODS A total of 560 patients were enrolled at 28 sites in the United States from April 2011 to February 2012. Patients were randomized to receive the SAPIEN or SAPIEN XT systems. The primary endpoint was a nonhierarchical composite of all-cause mortality, major stroke, and rehospitalization at 1 year in the intention-to-treat population, assessed by noninferiority testing. Pre-specified secondary endpoints included cardiovascular death, New York Heart Association functional class, myocardial infarction, stroke, acute kidney injury, vascular complications, bleeding, 6-min walk distance, and valve performance (by echocardiography). RESULTS Both overall and major vascular complications were higher at 30 days in patients undergoing TAVR with SAPIEN compared with SAPIEN XT (overall: 22.1% vs. 15.5%; p = 0.04; major: 15.2% vs. 9.5%; p = 0.04). Bleeding requiring blood transfusions was also more frequent with SAPIEN compared with SAPIEN XT (10.6% vs. 5.3%; p = 0.02). At 1-year follow-up, the nonhierarchical composite of all-cause mortality, major stroke, or rehospitalization was similar (37.7% SAPIEN vs. 37.2% SAPIEN XT; noninferiority p value <0.002); no differences in the other major pre-specified endpoints were found. CONCLUSIONS In inoperable patients with severe, symptomatic AS, the lower-profile SAPIEN XT is noninferior to SAPIEN with fewer vascular complications and a lesser need for blood transfusion. (The PARTNER II Trial: Placement of AoRTic TraNscathetER Valves; NCT01314313).
Collapse
|
15
|
Complete Coronary Revascularization Improves Survival in Octogenarians. Ann Thorac Surg 2016; 102:505-11. [DOI: 10.1016/j.athoracsur.2016.01.065] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 12/19/2015] [Accepted: 01/04/2016] [Indexed: 11/24/2022]
|
16
|
THE ASSOCIATION OF FRAILTY WITH MORTALITY IN HIGH RISK PATIENTS UNDERGOING TRANSCATHETER AORTIC VALVE REPLACEMENT: AN ANALYSIS OF THE PARTNER II ALTERNATIVE ACCESS COHORTS. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)30242-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
17
|
THE ASSOCIATION OF FRAILTY WITH MORTALITY IN HIGH RISK PATIENTS UNDERGOING TRANSCATHETER AORTIC VALVE REPLACEMENT: AN ANALYSIS OF THE PARTNER II B TRANSFEMORAL COHORT. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)30250-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
18
|
MULTIPLE BIOMARKERS OF CARDIOVASCULAR STRESS RISK STRATIFY PATIENTS WITH AORTIC STENOSIS AND A PRESERVED EJECTION FRACTION UNDERGOING AORTIC VALVE REPLACEMENT. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)30240-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
19
|
GDF15 AND ST2 IDENTIFY PATIENTS WITH AORTIC STENOSIS AND SEVERE LEFT VENTRICULAR HYPERTROPHY AT INCREASED RISK FOR MORTALITY AFTER AORTIC VALVE REPLACEMENT. J Am Coll Cardiol 2016. [DOI: 10.1016/s0735-1097(16)32196-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
20
|
Postoperative medication management after surgical ablation: Clarifying the role of amiodarone therapy. J Thorac Cardiovasc Surg 2016; 151:804-805. [PMID: 26896359 DOI: 10.1016/j.jtcvs.2015.10.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 10/26/2015] [Indexed: 11/24/2022]
|
21
|
Invited Commentary. Ann Thorac Surg 2015; 100:2218-9. [PMID: 26652516 DOI: 10.1016/j.athoracsur.2015.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Revised: 07/05/2015] [Accepted: 07/13/2015] [Indexed: 10/22/2022]
|
22
|
Transapical and Transaortic Transcatheter Aortic Valve Replacement in the United States. Ann Thorac Surg 2015; 100:1718-26; discussion 1726-7. [DOI: 10.1016/j.athoracsur.2015.05.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 04/24/2015] [Accepted: 05/01/2015] [Indexed: 10/23/2022]
|
23
|
Treating valvular heart disease has never been one size fits all. J Thorac Cardiovasc Surg 2015. [PMID: 26210266 DOI: 10.1016/j.jtcvs.2015.05.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
24
|
Hospital readmissions after cardiac surgery: Is it a game worth playing? J Thorac Cardiovasc Surg 2015; 149:858. [DOI: 10.1016/j.jtcvs.2014.11.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 11/25/2014] [Indexed: 10/24/2022]
|
25
|
Paravalvular regurgitation after transcatheter aortic valve replacement with the Edwards sapien valve in the PARTNER trial: characterizing patients and impact on outcomes. Eur Heart J 2014; 36:449-56. [PMID: 25273886 DOI: 10.1093/eurheartj/ehu384] [Citation(s) in RCA: 332] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIM The impact of paravalvular regurgitation (PVR) following transcatheter aortic valve replacement (TAVR) remains uncertain. In this analysis, we sought to evaluate the impact of varying degrees of PVR on both mortality and changes in ventricular geometry and function. METHODS AND RESULTS Clinical and echocardiographic outcomes of patients who underwent TAVR from the randomized cohorts and continued access registries in the PARTNER trial were analysed after stratifying by severity of post-implant PVR, which was graded as none/trace in 52.9% (n = 1288), mild in 38.0% (n = 925), and moderate/severe in 9.1% (n = 221). There were significant differences in baseline clinical and echocardiographic characteristics. After TAVR, all the patients demonstrated increase in left ventricular (LV) function and reduction in the LV mass index, although the magnitude of mass regression was lower in the moderate/severe PVR group. The 30-day mortality (3.1 vs. 3.4 vs. 4.5%, P = 0.56) and stroke (3.4 vs. 3.7 vs. 2.3%, P = 0.59) were similar in all groups (none/trace, mild, and moderate/severe). At 1 year, there was increased all-cause mortality (15.9 vs. 22.2 vs. 35.1%, P < 0.0001), cardiac mortality (6.1 vs. 7.4% vs. 16.3%, P < 0.0001) and re-hospitalization (14.4 vs. 23.0 vs. 31.3%, P < 0.0001) with worsening PVR. A multivariable analysis indicated that the presence of moderate/severe PVR (HR: 2.18, 95% CI: 1.57-3.02, P < 0.0001) or mild PVR (HR: 1.37, 95% CI: 1.14-1.90, P = 0.012) was associated with higher late mortality. CONCLUSION Differences in baseline characteristics in patients with increasing severities of PVR may increase the risk of this complication. Despite these differences, multivariable analysis demonstrated that both mild and moderate/severe PVR predicted higher 1-year mortality.
Collapse
|
26
|
TCT-326 Utility of Fractional Flow Reserve Assessment in Aortic Stenosis. J Am Coll Cardiol 2014. [DOI: 10.1016/j.jacc.2014.07.372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
27
|
30 DAY OUTCOMES FROM THE PARTNER II TRIAL FOR TRANSAPICAL AND TRANSFEMORAL 29MM TAVR IN INOPERABLE PATIENTS WITH THE EDWARDS SAPIEN XT. J Am Coll Cardiol 2014. [DOI: 10.1016/s0735-1097(14)61690-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
28
|
AORTIC INTRAMURAL HEMATOMA: PREDICTORS AND OUTCOMES OF PROGRESSION TO DISSECTION. J Am Coll Cardiol 2014. [DOI: 10.1016/s0735-1097(14)62035-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
29
|
Racial differences in rates of aortic valve replacement in patients with severe aortic stenosis. Am J Cardiol 2013; 112:991-5. [PMID: 23791013 DOI: 10.1016/j.amjcard.2013.05.030] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/14/2013] [Accepted: 05/14/2013] [Indexed: 10/26/2022]
Abstract
Racial disparities exist in the treatment of many cardiovascular diseases. Aortic valve replacement (AVR) is the only treatment for aortic stenosis (AS) that improves patient symptoms and survival. To date, no studies have compared the rate of AVR among different races. The records of patients with an aortic valve area <1 cm(2) by echocardiography diagnosed between January 2004 and May 2010 at Barnes-Jewish Hospital were reviewed retrospectively. Patients were stratified by race. Of the 880 patients analyzed, 10% were African American (AA), and 90% were European American (EA). AA more frequently had hypertension (82% vs 67%, p <0.01), diabetes mellitus (45% vs 32%, p = 0.02), chronic kidney disease (28% vs 17%, p = 0.01), and end stage renal disease (18% vs 2%, p <0.001). AA underwent AVR less frequently than EA (39% vs 53%, p = 0.02) and refused intervention more often (33% vs 20%, p = 0.04). When treated, AA and EA had similar 3-year survival (49% [38 to 60] vs 50% [45 to 54], p = 0.31). Identification of the factors associated with treatment refusal would further our ability to counsel patients on the decision to pursue AVR.
Collapse
|
30
|
TCT-113 Clinical and Left Ventricular Functional Outcomes Associated with Cardiac Biomarker Elevation after Transfemoral TAVR: A Sub-analysis from the PARTNER Trial. J Am Coll Cardiol 2013. [DOI: 10.1016/j.jacc.2013.08.842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
31
|
RACIAL DIFFERENCES AND POSTOPERATIVE COMPLICATIONS IN PATIENTS UNDERGOING AORTIC VALVE REPLACEMENTS FOR AORTIC STENOSIS. J Am Coll Cardiol 2013. [DOI: 10.1016/s0735-1097(13)61985-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
32
|
SHORT–TERM AND LONG–TERM OUTCOMES IN PATIENTS WITH CHRONIC OBSTRUCTS PULMONARY DISEASE UNDERGOING ISOLATED AORTIC VALVE REPLACEMENT FOR AORTIC STENOSIS. J Am Coll Cardiol 2013. [DOI: 10.1016/s0735-1097(13)61981-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
33
|
RACIAL DIFFERENCES IN RATES OF AORTIC VALVE REPLACEMENT IN PATIENTS WITH SEVERE AORTIC STENOSIS. J Am Coll Cardiol 2012. [DOI: 10.1016/s0735-1097(12)62042-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
34
|
Abstract
BACKGROUND Complex use of arterial conduits has resurrected concerns about the adequacy of conduit flow. The T-graft is the extreme example of this trend. Our purpose was to identify the limitation of single source inflow and to compare flow capacity with completion coronary flow. METHODS Between February 1999 and November 2001, 372 patients underwent total arterial revascularization with the T-graft alone. Intraoperative flows were recorded for each limb of the T-graft before and after distal anastomoses in 204 patients. Independent predictors of T-graft flow were identified by multivariate analysis. RESULTS Free flow for the radial arterial (RA) limb was 161 +/- 81 mL/min, the internal thoracic artery (ITA) limb 137 +/- 57 mL/min (combined 298 +/- 101 mL/min) versus simultaneous limb flow of 226 +/- 84 mL/min giving a flow restriction of 24% +/- 14%. Completion coronary flow was 88 +/- 49 mL/min for the RA, 60 +/- 45 mL/min for the ITA, and 140 +/- 70 mL/min for both limbs simultaneously to give a flow reserve (vs simultaneous free flow) of 160% or 1.6. Independent predictors of completion RA limb flow are RA proximal diameter (p = 0.005), number of anastomoses (p = 0.018), and target stenosis (p = 0.005). CONCLUSIONS A flow reserve of 1.6 compares favorably with an ITA flow reserve of 1.8 at 1-month postoperatively and 1.8 for both the ITA T-graft and the ITA/RA T-graft at 1-week postoperatively as reported by others. Proximal RA diameter and competitive coronary flow influence completion T-graft flow. These data quantitate the limitation of single source inflow of the T-graft configuration and support its continued use.
Collapse
|
35
|
Spatial organization of signal transduction molecules in the NK cell immune synapses during MHC class I-regulated noncytolytic and cytolytic interactions. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:4358-67. [PMID: 11591760 DOI: 10.4049/jimmunol.167.8.4358] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The cytolytic activity of NK cells is tightly regulated by inhibitory receptors specific for MHC class I Ags. We have investigated the composition of signal transduction molecules in the supramolecular activation clusters in the MHC class I-regulated cytolytic and noncytolytic NK cell immune synapses. KIR2DL3-positive NK clones that are specifically inhibited in their cytotoxicity by HLA-Cw*0304 and polyclonal human NK cells were used for conjugate formation with target cells that are either protected or are susceptible to NK cell-mediated cytotoxicity. Polarization of talin, microtubule-organizing center, and lysosomes occurred only during cytolytic interactions. The NK immune synapses were analyzed by three-dimensional immunofluorescence microscopy, which showed two distinctly different synaptic organizations in NK cells during cytolytic and noncytolytic interactions. The center of a cytolytic synapse with MHC class I-deficient target is comprised of a complex of signaling molecules including Src homology (SH)2-containing protein tyrosine phosphatase-1 (SHP-1). Closely related molecules with overlapping functions, such as the Syk kinases, SYK, and ZAP-70, and adaptor molecules, SH2 domain-containing leukocyte protein of 76 kDa and B cell linker protein, are expressed in activated NK cells and are all recruited to the center of the cytolytic synapse. In contrast, the noncytolytic synapse contains SHP-1, but is lacking other components of the central supramolecular activation cluster. These findings indicate a functional role for SHP-1 in both the cytolytic and noncytolytic interactions. We also demonstrate, in three-cell conjugates, that a single NK cell forms a cytolytic synapse with a susceptible target cell in the presence of both susceptible and nonsusceptible target cells.
Collapse
|