201
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Knappich C, Spin JM, Eckstein HH, Tsao PS, Maegdefessel L. Involvement of Myeloid Cells and Noncoding RNA in Abdominal Aortic Aneurysm Disease. Antioxid Redox Signal 2020; 33:602-620. [PMID: 31989839 PMCID: PMC7455479 DOI: 10.1089/ars.2020.8035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Significance: Abdominal aortic aneurysm (AAA) is a potentially fatal condition, featuring the possibility of high-mortality rupture. To date, prophylactic surgery by means of open surgical repair or endovascular aortic repair at specific thresholds is considered standard therapy. Both surgical options hold different risk profiles of short- and long-term morbidity and mortality. Targeting early stages of AAA development to decelerate disease progression is desirable. Recent Advances: Understanding the pathomechanisms that initiate formation, maintain growth, and promote rupture of AAA is crucial to developing new medical therapeutic options. Inflammatory cells, in particular macrophages, have been investigated for their contribution to AAA disease for decades, whereas evidence on lymphocytes, mast cells, and neutrophils is sparse. Recently, there has been increasing interest in noncoding RNAs (ncRNAs) and their involvement in disease development, including AAA. Critical Issues: The current evidence on myeloid cells and ncRNAs in AAA largely originates from small animal models, making clinical extrapolation difficult. Although it is feasible to collect surgical human AAA samples, these tissues reflect end-stage disease, preventing examination of critical mechanisms behind early AAA formation. Future Directions: Gaining more insight into how myeloid cells and ncRNAs contribute to AAA disease, particularly in early stages, might suggest nonsurgical AAA treatment options. The utilization of large animal models might be helpful in this context to help bridge translational results to humans.
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Affiliation(s)
- Christoph Knappich
- Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Joshua M Spin
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Hans-Henning Eckstein
- Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Philip S Tsao
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Lars Maegdefessel
- Department for Vascular and Endovascular Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.,Department of Medicine, Karolinska Institute, Stockholm, Sweden
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202
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Jensen R, Lane JS, Owens E, Bandyk D, Malas M, Covarrubias A, Levine M, Barleben A. Common Iliac Artery Aneurysm Repair with Hypogastric Preservation via Balloon-Expandable Covered Stents Using the Eyelet Technique-Iliac Branched Devices Still Inappropriate in Many Patients. Ann Vasc Surg 2020; 71:513-522. [PMID: 32950623 DOI: 10.1016/j.avsg.2020.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 07/06/2020] [Accepted: 09/01/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Common iliac artery aneurysms (CIAAs) are seen in 20-40% of patients with abdominal aortic aneurysms. Historically treated with sacrifice of the hypogastric artery, which can result in significant morbidity related to pelvic ischemia, new devices have made hypogastric artery preservation more feasible but are only applicable to a small subset of aneurysm anatomy. We sought to assess the safety and efficacy or a novel technique for hypogastric artery preservation applicable to a wider variety of patients with CIAAs. METHODS We conducted a retrospective review of a prospectively maintained database of all patients with CIAAs treated with a novel endovascular technique at the UC San Diego Sulpizio Cardiovascular Center or the San Diego Veterans Affairs Hospital between March 2016 and December 2017. The endovascular technique involved stent placement in both the internal and external iliac arteries, with balloon expansion to minimize gutters between the endografts. Primary end points included technical success, limb patency, and presence of endoleaks (ELs). RESULTS A total of 14 limbs (12 patients) were treated for CIAAs with 100% technical success and limb patency at an average of 6.8 months of follow-up. No patients experienced type I or type III ELs or evidence of pelvic ischemia. Two patients required reintervention, and one patient died of causes unrelated to the procedure. CONCLUSIONS This technique was performed with excellent short- and mid-term safety in patients with varying aneurysm anatomy. The high rates of technical success and low rate pelvic ischemia represent improvement over conventional techniques that sacrifice the hypogastric artery and warrant further testing in a larger patient series with longer term follow-up.
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Affiliation(s)
- Rachel Jensen
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | - John S Lane
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | - Erik Owens
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | - Dennis Bandyk
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | - Mahmoud Malas
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | | | - Michael Levine
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA
| | - Andrew Barleben
- University of California San Diego Sulpizio Cardiovascular Center, La Jolla, CA.
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203
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Zoethout AC, Sheriff A, Zeebregts CJ, Reijnen MMPJ, Hill A, Holden A. Migration After Endovasclar Aneurysm Sealing in Conjunction With Chimney Grafts. J Endovasc Ther 2020; 28:165-172. [PMID: 32909531 PMCID: PMC7816544 DOI: 10.1177/1526602820957279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Purpose To assess the incidence of migration after endovascular aneurysm sealing (EVAS) in conjunction with chimney grafts (chEVAS) for repair of abdominal aortic aneurysms (AAAs). Materials and Methods A retrospective, observational cohort study was conducted of 31 patients (mean age 75.7 years; 27 men) treated for juxtarenal AAA between April 2013 and December 2018 at single centers in New Zealand and the Netherlands. The majority of patients received >1 chimney graft (13 single, 13 double, and 5 triple) during chEVAS. Six patients had only the first postoperative scan, so the migration analysis was based on 25 patients. Results Median seal length assessed on the first postoperative computed tomography scan was 36.5 mm. The assisted technical success rate was 93.5% with 2 technical failures. Median time to final imaging follow-up was 17 months in 25 patients. At the latest follow-up, there were no cases of caudal migration >10 mm. Freedom from caudal movement of 5 to 9 mm was estimated as 86.1% at 1 year and 73.9% at 2 years; freedom from clinically relevant migration (movement requiring reintervention) was 100% at both time intervals. However, at 3 years there were 2 cases of caudal movement of 5 to 9 mm and a type Ia endoleak warranting reintervention. No correlation between migration and aneurysm growth (p=0.851), endoleak (p=0.562), or the number of chimney grafts (p=0.728) was found. During follow-up, 2 patients (7%) had aneurysm rupture and 10 (33%) had reinterventions. Eight patients (27%) died; 2 were aneurysm-related (7%) and due to the consequences of a reintervention. Conclusion In the 2 years following chEVAS, there was no caudal migration >10 mm, but nearly a quarter of patients had caudal movement of 5 to 9 mm. A trend was observed toward ongoing migration that required intervention at 3-year follow-up. chEVAS is technically challenging and should be considered only for patients with no viable alternative treatment option.
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Affiliation(s)
- Aleksandra C Zoethout
- Department of Interventional Radiology and Vascular Surgery, Auckland City Hospital, Auckland, New Zealand.,Department of Surgery, Division of Vascular Surgery, University Medical Center Groningen, University of Groningen, the Netherlands.,Department of Vascular Surgery, Rijnstate Hospital, Arnhem, the Netherlands
| | - Arshad Sheriff
- Department of Interventional Radiology and Vascular Surgery, Auckland City Hospital, Auckland, New Zealand
| | - Clark J Zeebregts
- Department of Surgery, Division of Vascular Surgery, University Medical Center Groningen, University of Groningen, the Netherlands
| | - Michel M P J Reijnen
- Department of Vascular Surgery, Rijnstate Hospital, Arnhem, the Netherlands.,MultiModality Medical Imaging Group, TechMed Centre, University of Twente, Enschede, the Netherlands
| | - Andrew Hill
- Department of Interventional Radiology and Vascular Surgery, Auckland City Hospital, Auckland, New Zealand
| | - Andrew Holden
- Department of Interventional Radiology and Vascular Surgery, Auckland City Hospital, Auckland, New Zealand
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204
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Zarkowsky DS, Nejim B, Hubara I, Hicks CW, Goodney PP, Malas MB. Deep Learning and Multivariable Models Select EVAR Patients for Short-Stay Discharge. Vasc Endovascular Surg 2020; 55:18-25. [PMID: 32909908 DOI: 10.1177/1538574420954299] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES We sought to develop a prediction score with data from the Vascular Quality Initiative (VQI) EVAR in efforts to assist endovascular specialists in deciding whether or not a patient is appropriate for short-stay discharge. BACKGROUND Small series describe short-stay discharge following elective EVAR. Our study aims to quantify characteristics associated with this decision. METHODS The VQI EVAR and NSQIP datasets were queried. Patients who underwent elective EVAR recorded in VQI, between 1/2010-5/2017 were split 2:1 into test and analytic cohorts via random number assignment. Cross-reference with the Medicare claims database confirmed all-cause mortality data. Bootstrap sampling was employed in model. Deep learning algorithms independently evaluated each dataset as a sensitivity test. RESULTS Univariate outcomes, including 30-day survival, were statistically worse in the DD group when compared to the SD group (all P < 0.05). A prediction score, SD-EVAR, derived from the VQI EVAR dataset including pre- and intra-op variables that discriminate between SD and DD was externally validated in NSQIP (Pearson correlation coefficient = 0.79, P < 0.001); deep learning analysis concurred. This score suggests 66% of EVAR patients may be appropriate for short-stay discharge. A free smart phone app calculating short-stay discharge potential is available through QxMD Calculate https://qxcalc.app.link/vqidis. CONCLUSIONS Selecting patients for short-stay discharge after EVAR is possible without increasing harm. The majority of infrarenal AAA patients treated with EVAR in the United States fit a risk profile consistent with short-stay discharge, representing a significant cost-savings potential to the healthcare system.
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Affiliation(s)
- Devin S Zarkowsky
- Division of Vascular and Endovascular Surgery, 1878University of Colorado, Aurora, CO, USA
| | - Besma Nejim
- Division of Vascular Surgery and Endovascular Therapy, 1466The Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Itay Hubara
- Department of Mechanical Engineering and Computer Science, Technion, Haifa, Israel
| | - Caitlin W Hicks
- Division of Vascular Surgery and Endovascular Therapy, 1466The Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Philip P Goodney
- The Division of Vascular and Endovascular Surgery, 22916Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Mahmoud B Malas
- The Division of Vascular and Endovascular Surgery, 8784University of California San Diego, La Jolla, CA, USA
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205
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Sousa J, Rocha-Neves J, Oliveira-Pinto J, Mansilha A. Myocardial injury after non-cardiac surgery (MINS) in EVAR patients: a retrospective single-centered study. THE JOURNAL OF CARDIOVASCULAR SURGERY 2020; 62:130-135. [PMID: 32885923 DOI: 10.23736/s0021-9509.20.11205-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Myocardial injury after non-cardiac surgery (MINS) stands for myocardial injury due to ischemia that occurs during or within 30-days after non-cardiac surgery. Although MINS is known to be independently associated with 30-day mortality after intervention, little is described about the impact of MINS after vascular procedures, particularly after endovascular aneurysm repair (EVAR). METHODS This is an observational, retrospective, single-centered study. All patients underwent elective standard EVAR between January 2008 and June 2017, and them with at least one postoperative measurement of troponin I in the first 48 h after surgery, were retrospectively included. MINS was defined as the value exceeding the 99th percentile of a normal reference population with a coefficient of variation <10%. Primary outcomes include the prevalence of MINS in this subset of EVAR patients, as well as its impact in mid-term all-cause mortality. As secondary aim, the preoperative predictors of MINS were also assessed. RESULTS One-hundred and thirty-six patients with postoperative troponin measurements were included (95.6% male; mean age 75.51years). MINS was diagnosed in 16.2% (N.=22) of the patients, and in 86.4% of the cases (N.=19) it was completely asymptomatic. Heart failure (31.8% vs. 10.5%, P=0.016), ASA Score ≥3 (95.5% vs. 67.5%, P=0.004), pre-operative (P=0.036) and postoperative (P=0.04) hemoglobin concentrations ≤12 g/dL were found to be significantly associated with MINS. Regarding remaining baseline characteristics, anesthesia and femoral access, no further differences were observed. Survival at 1, 3 and 5 years was 92% (95% CI: 4.6-6.9, standard error [SE] 0.023), 81% (95% CI: 5.6-7.6, SE=0.034) and 71% (95% CI: 6.9-8.7, SE=0.04), with two deaths reported at 30 days follow-up. MINS was found to be significantly associated with increased mid-term all-cause mortality after EVAR at 24 months follow-up (84.2±3.4% vs. 63.6±10.3%, P=0.001), with a 2.12-fold risk increase of death. CONCLUSIONS MINS is a common complication after EVAR and negatively impacts the mid-term prognosis of such interventions. In the majority of cases, it is asymptomatic and, therefore, not detectable unless routine postoperative troponin measurements are performed.
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Affiliation(s)
- Joel Sousa
- Department of Angiology and Vascular Surgery, CHU de S. João, Porto, Portugal - .,Department of Physiology and Surgery, Faculty of Medicine, University of Porto, Porto, Portugal -
| | - João Rocha-Neves
- Department of Angiology and Vascular Surgery, CHU de S. João, Porto, Portugal.,Department of Physiology and Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
| | - José Oliveira-Pinto
- Department of Angiology and Vascular Surgery, CHU de S. João, Porto, Portugal.,Department of Physiology and Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Armando Mansilha
- Department of Angiology and Vascular Surgery, CHU de S. João, Porto, Portugal.,Department of Physiology and Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
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206
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Duong WQ, Fujitani RM, Grigorian A, Kabutey NK, Kuo I, de Virgilio C, Lekawa M, Nahmias J. Evolving Utility of Endovascular Treatment of Juxtarenal, Pararenal, and Suprarenal Abdominal Aortic Aneurysms Associated With Increased Risk of Mortality Over Time. Ann Vasc Surg 2020; 71:428-436. [PMID: 32889159 DOI: 10.1016/j.avsg.2020.08.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/19/2020] [Accepted: 08/10/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND Continued advances in endovascular technologies are resulting in fewer open abdominal aortic aneurysm (AAA) repairs. In addition, more complex juxtarenal, pararenal, and suprarenal (JPS) AAAs are being managed with various endovascular techniques. This study sought to evaluate the evolving trends in endovascular aneurysm repair (EVAR) of AAAs, hypothesizing increased rate of JPS AAA repair by EVAR. We also sought to evaluate the risk for morbidity and mortality for EVAR and open aneurysm repair (OAR) of JPS AAAs over time. METHODS The 2011-2017 American College of Surgeons National Surgical Quality Improvement Program Procedure-Targeted Vascular database was queried for patients undergoing OAR or EVAR for AAAs. A multivariable logistic regression analysis was performed for both infrarenal and JPS AAA repairs. RESULTS Of 18,661 patients who underwent AAA repair, 3,941 (21.1%) were OAR and 14,720 (78.9%) were EVAR. The rate of OAR decreased from 29.5% in 2011 to 21.3% in 2017 (P < 0.001) with a geometric-mean-annual decrease of 27.8%. The rate of EVAR increased from 70.5% to 78.7% during the same time period (P < 0.001) with a geometric-mean-annual increase of 11.6%. These trends remained true for both infrarenal and JPS AAAs. After adjusting for covariates, there was no difference in associated risk of 30-day mortality, renal complications, or ischemic colitis for either OAR or EVAR over each incremental year for infrarenal AAAs (P > 0.05). However, in patients undergoing EVAR for JPS AAAs, the associated risk of mortality increased with each incremental year (odds ratio [OR]: 1.30, confidence interval [CI]: 1.01-1.69, P = 0.039), whereas there was no difference in the risk of mortality for OAR of JPS AAAs with each incremental year (OR: 1.11, CI: 0.99-1.23, P = 0.067). CONCLUSIONS The rate of OAR for AAA has decreased over the past seven years with an increase in EVAR, particularly for more complex JPS AAAs. The associated risk for morbidity and mortality for treatment of infrarenal AAAs was not significantly affected by this increased utility of EVAR. The associated risk of mortality for JPS AAAs treated by EVAR increased over time, whereas this trend for associated risk of mortality was not seen for OAR of JPS AAAs. These findings, especially the increased associated risk of mortality over time with EVAR for JPS AAAs, warrant careful prospective analysis.
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Affiliation(s)
- William Q Duong
- University of California, Irvine, Department of Surgery, Orange, CA.
| | - Roy M Fujitani
- University of California, Irvine, Department of Surgery, Orange, CA
| | - Areg Grigorian
- University of California, Irvine, Department of Surgery, Orange, CA
| | - Nii-Kabu Kabutey
- University of California, Irvine, Department of Surgery, Orange, CA
| | - Isabella Kuo
- University of California, Irvine, Department of Surgery, Orange, CA
| | | | - Michael Lekawa
- University of California, Irvine, Department of Surgery, Orange, CA
| | - Jeffry Nahmias
- University of California, Irvine, Department of Surgery, Orange, CA
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207
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Boutrous ML, Peterson BG, Smeds MR. Predictors of Aneurysm Sac Shrinkage Utilizing a Global Registry. Ann Vasc Surg 2020; 71:40-47. [PMID: 32889165 DOI: 10.1016/j.avsg.2020.08.110] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 05/17/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Aneurysm sac remodeling is a complex multifactorial process with unknown factors influencing sac regression after endovascular aortic aneurysm repair (EVAR). We sought to identify factors associated with this process by analyzing data obtained from patients treated with the GORE EXCLUDER endovascular aneurysm repair (EVAR) endoprosthesis from December 2010 to October 2016 enrolled in the Global Registry for Endovascular Aortic Treatment (GREAT). METHODS All patients enrolled in GREAT with three years CT angiography (CTA) follow-up in each of the three successive years after EVAR were included. The percentage of sac size reduction toward device diameter was calculated and used as a surrogate for sac regression with the formula used being: sac size reduction = ((AAA baseline diameter - AAA diameter at follow-up)/(AAA baseline diameter - device diameter))∗100. The cohort was divided into two groups in accordance with the percentage of aneurysm sac reduction at three years; one with the top quartile of patients and the other with the lowest three quartiles. Demographic and procedural variables were analyzed using univariate and regression modeling to determine factors predictive of sac regression. RESULTS There were 3265 subjects enrolled with follow-up as of May 2018 of which 526 (16.2%) had three years of CTA surveillance. Overall aneurysm sac size decreased from a mean of 58.0 mm (Std Dev: 10.4, range: 34.2, 100.0) to a mean of 49.3 mm (Std Dev: 14.1, range: 0, 140) for a percentage reduction toward device diameter of a mean 28.2% (Std Dev: 39.0, range: -103.7, 183.9). On multivariate logistic regression model; two factors proved to be statistically significant contributors to a larger percentage reduction in aneurysm sac: a conical neck (odds ratio [OR] = 1.64, P-value = 0.023) and a larger proximal device diameter (OR = 1.09, P-value = 0.023). On the other hand, two factors were negative predictors of sac shrinkage, namely: old age (OR = 0.96, P-value = 0.002) and larger baseline aneurysm sac diameter (OR = 0.98, P-value = 0.028). CONCLUSIONS Aneurysms with conical necks and larger proximal device neck diameters have an increased percentage change in sac size over time after EVAR. Older age and larger initial diameters of aneurysms were negatively associated with percentage change in sac size as well as sac regression. Further study is needed to determine the clinical utility of these observations and applicability across multiple endoprosthesis platforms.
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Affiliation(s)
- Mina L Boutrous
- Division of Vascular and Endovascular Surgery, Saint Louis University, Saint Louis, MO
| | - Brian G Peterson
- Department of Vascular Surgery, Mercy South Hospital, Saint Louis, MO
| | - Matthew R Smeds
- Division of Vascular and Endovascular Surgery, Saint Louis University, Saint Louis, MO.
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208
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Wanken ZJ, Barnes JA, Trooboff SW, Columbo JA, Jella TK, Kim DJ, Khoshgowari A, Riblet NB, Goodney PP. A systematic review and meta-analysis of long-term reintervention after endovascular abdominal aortic aneurysm repair. J Vasc Surg 2020; 72:1122-1131. [DOI: 10.1016/j.jvs.2020.02.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 02/03/2020] [Indexed: 01/12/2023]
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209
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Harbron RW, Abdelhalim M, Ainsbury EA, Eakins JS, Alam A, Lee C, Modarai B. Patient radiation dose from x-ray guided endovascular aneurysm repair: a Monte Carlo approach using voxel phantoms and detailed exposure information. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2020; 40:704-726. [PMID: 32428884 DOI: 10.1088/1361-6498/ab944e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Endovascular aneurysm repair (EVAR) is a well-established minimally invasive technique that relies on x-ray guidance to introduce a stent through the femoral artery and manipulate it into place. The aim of this study was to estimate patient organ and effective doses from EVAR procedures using anatomically realistic computational phantoms and detailed exposure information from radiation dose structured reports (RDSR). Methods: Lookup tables of conversion factors relating kerma area product (PKA) to organ doses for 49 different beam angles were produced using Monte Carlo simulations (MCNPX2.7) with International Commission on Radiological Protection (ICRP) adult male and female voxel phantoms for EVAR procedures of varying complexity (infra-renal, fenestrated/branched and thoracic EVAR). Beam angle specific correction factors were calculated to adjust doses according to x-ray energy. A MATLAB function was written to find the appropriate conversion factor in the lookup table for each exposure described in the RDSR, perform energy corrections and multiply by the respective exposure PKA. Using this approach, organ doses were estimated for 183 EVAR procedures in which RDSRs were available. A number of simplified dose estimation methodologies were also investigated for situations in which RDSR data are not available. Results: Mean estimated bone marrow doses were 57 (range: 2-247), 86 (2-328) and 54 (8-250) mGy for infra-renal, fenestrated/branched and thoracic EVAR, respectively. Respective effective doses were 27 (1-208), 54 (1-180) and 37 (5-167) mSv. Dose estimates using non-individualised, average conversion factors, along with those produced using the alternative Monte Carlo code PCXMC, yielded reasonably similar results overall, though variation for individual procedures could exceed 100% for some organs. In conclusion, radiation doses from x-ray guided endovascular aneurysm repairs are potentially high, though this must be placed in the context of the life sparing nature and high success rate for this procedure.
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Affiliation(s)
- Richard W Harbron
- Population Health Sciences Institute, Newcastle University, Royal Victoria Infirmary, Queen Victoria Road, Newcastle-upon-Tyne NE1 4LP, United Kingdom. NIHR Health Protection Research Unit in Chemical and Radiation Threats and Hazards, Newcastle University, Newcastle-upon-Tyne United Kingdom
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210
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Effect of obesity on radiation exposure, quality of life scores, and outcomes of fenestrated-branched endovascular aortic repair of pararenal and thoracoabdominal aortic aneurysms. J Vasc Surg 2020; 73:1156-1166.e2. [PMID: 32853700 DOI: 10.1016/j.jvs.2020.07.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/16/2020] [Indexed: 01/20/2023]
Abstract
BACKGROUND The aim of the present study was to assess the effect of obesity on procedural metrics, radiation exposure, quality of life (QOL), and clinical outcomes of fenestrated-branched endovascular aortic repair (FB-EVAR) of pararenal and thoracoabdominal aortic aneurysms. METHODS We reviewed the clinical data from 334 patients (236 men; mean age, 75 ± 8 years) enrolled in a prospective nonrandomized study to evaluate FB-EVAR from 2013 to 2019. The patients were classified using the body mass index (BMI) as obese (BMI ≥30 kg/m2) or nonobese (BMI <30 kg/m2). QOL questionnaires (short-form 36-item questionnaire) and imaging studies were obtained preoperatively and at 2 months and 6 months postoperatively, and annually thereafter. The procedures were performed using two different fixed imaging systems. The end points included procedural metrics (ie, total operative time, fluoroscopic time, contrast volume), radiation exposure, technical success, 30-day mortality, and major adverse events, QOL changes, freedom from target vessel instability, freedom from reintervention, and patient survival. RESULTS The aneurysm extent was a pararenal aortic aneurysm in 117 patients (35%) and a thoracoabdominal aortic aneurysm in 217 patients (65%). Both groups had similar demographics, cardiovascular risk factors, and aneurysm extent, except for a greater incidence of hyperlipidemia and diabetes among the obese patients (P < .05). No significant differences were found in the procedural metrics or intraprocedural complications between the groups, except that the obese patients had greater radiation exposure than the nonobese patients (mean, 2.5 vs 1.6 Gy; P < .001), with the highest radiation exposure in those obese patients who had undergone the procedure using system 1 (fusion alone) instead of system 2 (fusion and digital zoom; mean, 4.1 vs 1.5 Gy; P < .001). Three patients had died within 30 days (0.8%), with no difference in mortality or major adverse events between the groups. The mental QOL scores had improved in the obese group at 2 and 12 months compared with the nonobese patients, with persistently higher scores up to 3 years. At 3 years, the obese and nonobese patients had a similar incidence of freedom from target vessel instability (74% ± 6% vs 80% ± 3%; P = .99, log-rank test), freedom from reintervention (66% ± 6% vs 73% ± 4%; P = .77, log-rank test), and patient survival (83% ± 5% vs 75% ± 4%; P = .16, log-rank test). CONCLUSIONS FB-EVAR was performed with high technical success and low mortality and morbidity, with no significant differences between the obese and nonobese patients. The procedural metrics and outcomes were similar, with the exception of greater radiation exposure among obese patients, especially for the procedures performed using system 1 with fusion alone compared with system 2 (fusion and digital zoom). Obese patients had higher QOL mental scores at 2 and 12 months, with a similar reintervention rate, target vessel outcomes, and survival compared with nonobese patients.
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211
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Spanos K, Nana P, Behrendt CA, Kouvelos G, Panuccio G, Heidemann F, Matsagkas M, Debus S, Giannoukas A, Kölbel T. Management of Abdominal Aortic Aneurysm Disease: Similarities and Differences Among Cardiovascular Guidelines and NICE Guidance. J Endovasc Ther 2020; 27:889-901. [PMID: 32813590 DOI: 10.1177/1526602820951265] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The development of endovascular techniques has improved abdominal aortic aneurysm (AAA) management over the past 2 decades. Different cardiovascular societies worldwide have recommended the endovascular approach as the standard of care in their currently available guidelines. While endovascular treatment has established its role in daily clinical practice, a new debate has arisen regarding the indications, appropriateness, limitations, and role of open surgery. To inform this debate, the MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials databases were searched from 2010 to May 2020; the systematic search identified 5 articles published between 2011 and 2020 by 4 cardiovascular societies and the National Institute of Health and Care Excellence (NICE). Four debatable domains were assessed and analyzed: diagnostic methods and screening, preoperative management, indications and treatment modalities, and postoperative follow-up and endoleak management. The review addresses controversial proposals as well as widely accepted recommendations and "gray zone" issues that need to be further investigated and analyzed, such as screening in women, medical management, and follow-up imaging. While the recommendations for AAA management have significant overlap and agreement among international cardiovascular societies, the NICE guidelines diverge regarding the role of open repair in aortic disease, recommending conventional surgery in most elective cases.
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Affiliation(s)
- Konstantinos Spanos
- Department of Vascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece.,German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
| | - Petroula Nana
- Department of Vascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Christian-Alexander Behrendt
- German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
| | - George Kouvelos
- Department of Vascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Giuseppe Panuccio
- German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
| | - Franziska Heidemann
- German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
| | - Miltiadis Matsagkas
- Department of Vascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Sebastian Debus
- German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
| | - Athanasios Giannoukas
- Department of Vascular Surgery, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Tilo Kölbel
- German Aortic Center Hamburg, Department of Vascular Medicine, University Heart & Vascular Center, Hamburg, Germany
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AlOthman O, Bobat S. Comparison of the Short and Long-Term Outcomes of Endovascular Repair and Open Surgical Repair in the Treatment of Unruptured Abdominal Aortic Aneurysms: Meta-Analysis and Systematic Review. Cureus 2020; 12:e9683. [PMID: 32923276 PMCID: PMC7486022 DOI: 10.7759/cureus.9683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background Although the initial results of endovascular repair (EVAR) were promising, a comparison of its long-term efficacy against open surgical repair (OSR) remains largely elusive, and late-onset adverse events have not been systematically evaluated. Since OSR and EVAR are currently the only treatment options available in the management of abdominal aortic aneurysms (AAAs), the main question arising in clinical practice is whether EVAR or OSR confers more favourable short and long-term outcomes for patients presenting with unruptured AAAs. Aims The present meta-analysis aims to draw a head-to-head comparison between EVAR and OSR and facilitate the formulation of an evidence-based approach to the clinical management of unruptured AAAs. Methods A systematic review was conducted using three databases to identify all relevant studies with comparative data on EVAR vs. OSR. All-cause mortality was the primary outcome. Procedural outcomes, such as stroke, myocardial infarction, renal complications, rupture, and reintervention rates, were determined as secondary outcomes. Results Sixteen studies were included for comparative analysis, including four randomised-controlled trials and six non-randomised comparative clinical trials. EVAR conferred a clear perioperative survival advantage as compared to OSR (P < 0.00001). However, this survival advantage did not persist beyond two years post-procedure; all-cause mortality rates were comparable between the two treatment groups at two years (P = 0.09), four years (P = 0.58), and six years (P = 0.88) post-procedure. Although no statistically significant differences in aneurysm-related mortality, postoperative stroke, or myocardial infarction were identified, the OSR group had a statistically significant higher rate of postoperative renal complications. On the other hand, there was a statistically significant higher rate of rupture and reintervention following EVAR. Conclusion Whether the initial survival advantage afforded by EVAR is sufficient to justify the long-term risk of rupture, reintervention, and long-term mortality should be determined on a case-by-case basis by the multidisciplinary team overseeing the clinical care of the patient. Currently, it is reasonable to conclude that EVAR is as efficacious as OSR, but it would be invalid to claim it as superior. Ultimately, longer follow-up data must be presented before any definitive conclusions can be established for this potentially revolutionary technique. Presently, one can neither advocate nor refute EVAR over OSR.
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Affiliation(s)
- Othman AlOthman
- Surgery, School of Medicine, University of Nottingham, Nottingham, GBR
| | - Suleiman Bobat
- Vascular Surgery, Queen's Medical Centre, Nottingham, GBR
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213
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Çekmecelioglu D, Orozco-Sevilla V, Coselli JS. Open vs. endovascular thoracoabdominal aortic aneurysm repair: tale of the tape. Asian Cardiovasc Thorac Ann 2020; 29:643-653. [PMID: 32772547 DOI: 10.1177/0218492320949073] [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] [Indexed: 11/16/2022]
Abstract
Open surgical repair persists as the gold-standard operation for thoracoabdominal aortic aneurysm; however, endovascular repair has become commonplace. Technical considerations in thoracoabdominal aortic aneurysm treatment are particularly complex, insofar as it involves critical branching arteries feeding the visceral organs. Newer, low-profile devices make total endovascular thoracoabdominal aortic aneurysm repair more feasible and, thus, appealing. For younger and low-risk patients, the choice between open and endovascular therapy remains controversial. Despite the advantages of a minimally invasive procedure, data suggest that endovascular aortic repair incurs a greater risk of spinal cord deficit, and the durability of endovascular aortic repair remains unclear. It is difficult to compare outcomes between endovascular and open thoracoabdominal aortic aneurysm repair, primarily because of the current investigational status of endovascular devices, the variety of approaches to endovascular repair, differing patient populations, lack of prospective randomized studies, and minimal medium- and long-tern follow-up data on endovascular repair. When deciding between open and endovascular approaches, one should consider which is more suitable for each patient. Older patients generally benefit from a less invasive approach. Open repair should be considered for young patients and those with heritable thoracic aortic disease. Infection and fistulae are best treated by open repair, although endovascular intervention as a lifesaving bridge to definitive repair has evolved to become a critical component of initial treatment. It is crucial to have technical expertise in both open and endovascular procedures to provide the best aortic repair for the patient. This may require dedicated aortic programs at tertiary institutions.
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Affiliation(s)
- Davut Çekmecelioglu
- Department of Cardiovascular Surgery, Texas Heart Institute, Houston, Texas, USA.,Division of Cardiothoracic Surgery, Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, USA.,Department of Cardiovascular Surgery, CHI St. Luke's Health, Baylor St. Luke's Medical Center, Houston, Texas, USA
| | - Vicente Orozco-Sevilla
- Department of Cardiovascular Surgery, Texas Heart Institute, Houston, Texas, USA.,Division of Cardiothoracic Surgery, Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, USA.,Department of Cardiovascular Surgery, CHI St. Luke's Health, Baylor St. Luke's Medical Center, Houston, Texas, USA
| | - Joseph S Coselli
- Department of Cardiovascular Surgery, Texas Heart Institute, Houston, Texas, USA.,Division of Cardiothoracic Surgery, Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, USA.,Department of Cardiovascular Surgery, CHI St. Luke's Health, Baylor St. Luke's Medical Center, Houston, Texas, USA.,Cardiovascular Research Institute, Baylor College of Medicine, Houston, Texas, USA
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214
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Kobayashi M, Hoshina K, Nemoto Y, Takagi S, Shojima M, Hayakawa M, Yamada S, Oshima M. A penalized spline fitting method to optimize geometric parameters of arterial centerlines extracted from medical images. Comput Med Imaging Graph 2020; 84:101746. [PMID: 32745635 DOI: 10.1016/j.compmedimag.2020.101746] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 04/21/2020] [Accepted: 06/04/2020] [Indexed: 10/23/2022]
Abstract
In order to grasp the spatial and temporal evolution of vascular geometry, three-dimensional (3D) arterial bending structure and geometrical changes of arteries and stent grafts (SG) must be quantified using geometrical parameters such as curvature and torsion along the vasculature centerlines extracted from medical images. Here, we develop a robust method for constructing smooth centerlines based on a spline fitting method (SFM) such that the optimized geometric parameters of curvature and torsion can be obtained independently of digitization noise in the images. Conventional SFM consists of the 3rd degree spline basis function and 2nd derivative penalty term. In contrast, the present SFM uses the 5th degree spline basis function and 3rd and 4th derivative penalty terms, the coefficients of which are derived by the Akaike information criterion. The results show that the developed SFM can reduce the errors of curvature and torsion compared to conventional SFM. We then apply the present SFM to the centerline of the SG in an abdominal aortic aneurysm (AAA), and those of bilateral internal carotid arteries (ICA) in 6 cases: 3 cases with aneurysms and 3 cases without any aneurysm. The SG centerlines were obtained from temporal medical images at three scan times. The strong peak of the curvature could be clearly observed in the distal area of the SG, the inversion of the torsion at 0 months in the middle area of SG disappeared over time, and the torsions around the SG bifurcation at the three time periods were inverted. The curvature-torsion graphs along the ICA centerlines superimposing five aneurysmal positions were useful for investigating the relationship between arterial bending structure and aneurysmal positions. Both ICAs had curvature peak values higher than 0.4 within the ICA syphons. The ICA torsion graphs indicated that left and right ICA tended to be a right- and left-handed helix, respectively. In the left ICA syphon, the biggest aneurysm could be observed downstream of the salient torsion inversion. All aneurysms for 3 cases were positioned at the downstream of the inverted torsion.
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Affiliation(s)
- Masaharu Kobayashi
- Graduate School of Interdisciplinary Information Studies, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
| | - Katsuyuki Hoshina
- Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Youkou Nemoto
- Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Shu Takagi
- Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan.
| | - Masaaki Shojima
- Department of Neurosurgery, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
| | - Motoharu Hayakawa
- Department of Neurosurgery, Fujita Health University, 1-98 Kengakugakubo, Kutsukake-cho, Toyoake, Aichi 470-1192, Japan.
| | - Shigeki Yamada
- Department of Neurosurgery, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga 520-2192, Japan.
| | - Marie Oshima
- Interfaculty in Information Studies/Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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215
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Varkevisser RRB, Swerdlow NJ, de Guerre LEMV, Dansey K, Zarkowsky DS, Goodney PP, Verhagen HJM, Schermerhorn ML. Midterm survival after endovascular repair of intact abdominal aortic aneurysms is improving over time. J Vasc Surg 2020; 72:556-565.e6. [PMID: 32093912 PMCID: PMC8025309 DOI: 10.1016/j.jvs.2019.10.082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/16/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE There is a growing body of literature raising concerns about the long-term durability of endovascular aneurysm repair (EVAR) for abdominal aortic aneurysms (AAAs), suggesting that long-term outcomes may be better after open AAA repair. However, the data investigating these long-term outcomes largely originate from early in the endovascular era and therefore do not account for increasing clinical experience and technologic improvements. We investigated whether 4-year outcomes after EVAR and open repair have improved over time. METHODS We identified all EVARs and open repairs for intact infrarenal AAA within the Vascular Quality Initiative database (2003-2018). We then stratified patients by procedure year into treatment cohorts of four years: 2003-2006, 2007-2010, 2011-2014, and 2015-2018. We used Kaplan-Meier analysis and Cox proportional hazards models to assess whether the survival after EVAR or open repair changed over time. In addition, we propensity matched EVAR and open repairs for each time cohort to investigate whether the relative survival benefit of EVAR over open repair changed over time. RESULTS We included 42,293 EVARs (increasing from 549 performed between 2003 and 2006 to 25,433 between 2015 and 2018) and 5189 open AAA repairs (increasing from 561 to 2306). Four-year survival increased for the periods 2003-2006, 2007-2010, 2011-2014, and 2015-2018 after both EVAR (76.6% vs 79.7% vs 83.5% vs 87.3%; P < .001) and open repair (82.2% vs 85.8% vs 87.7% vs 88.9%; P = .026). After risk adjustment, compared with 2003-2006, hazard of mortality up to 4 years after EVAR was lower for those performed between 2011 and 2014 (hazard ratio [HR], 0.72; 95% confidence interval [CI], 0.59-0.87; P = .001) and for those performed between 2015 and 2018 (HR, 0.56; 95% CI, 0.46-0.68; P < .001). In contrast, the risk-adjusted hazard of mortality was similar between open repair cohorts (2011-2014: HR, 0.81 [95% CI, 0.61-1.08; P = .15]; and 2015-2018: HR, 0.86 [95% CI, 0.64-1.17; P = .34]). Finally, in matched EVAR and open repairs, there was no difference in mortality in the first three cohorts, whereas the hazard of mortality was lower for the 2015-2018 cohort (HR, 0.65; 95% CI, 0.51-0.84; P = .001). CONCLUSIONS Four-year survival improved in more recent years after EVAR but not after open repair. This finding suggests that midterm outcomes after EVAR are improving, perhaps because of technologic improvements and increased experience, information that should be considered by surgeons and policymakers alike in evaluating the value of contemporary EVAR and open AAA repair.
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Affiliation(s)
- Rens R B Varkevisser
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass; Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Nicholas J Swerdlow
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass
| | - Livia E M V de Guerre
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass
| | - Kirsten Dansey
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass
| | - Devin S Zarkowsky
- Division of Vascular and Endovascular Surgery, University of California San Francisco, San Francisco, Calif
| | - Philip P Goodney
- Division of Vascular and Endovascular Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH
| | - Hence J M Verhagen
- Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Marc L Schermerhorn
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass.
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216
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Benveniste GL, Tjahjono R, Chen O, Verhagen HJ, Böckler D, Varcoe RL. Long-term Results of 180 Consecutive Patients with Abdominal Aortic Aneurysm Treated with the Endurant Stent Graft System. Ann Vasc Surg 2020; 67:265-273. [DOI: 10.1016/j.avsg.2020.02.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 02/04/2020] [Accepted: 02/16/2020] [Indexed: 10/24/2022]
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217
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Miller K, Mufty H, Catlin A, Rogers C, Saunders B, Sciarrone R, Fourneau I, Meuris B, Tavner A, Joldes GR, Wittek A. Is There a Relationship Between Stress in Walls of Abdominal Aortic Aneurysm and Symptoms? J Surg Res 2020; 252:37-46. [DOI: 10.1016/j.jss.2020.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 01/17/2020] [Accepted: 01/31/2020] [Indexed: 10/24/2022]
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218
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Böckler D, Geisbüsch P, Hatzl J, Uhl C. Erste Anwendungsoptionen von künstlicher Intelligenz und digitalen Systemen im gefäßchirurgischen Hybridoperationssaal der nahen Zukunft. GEFÄSSCHIRURGIE 2020. [DOI: 10.1007/s00772-020-00666-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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219
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Rubero J, Stead TS, Ganti L. A Case Report on Endovascular Aortic Repair Rupture. Cureus 2020; 12:e9209. [PMID: 32821562 PMCID: PMC7430348 DOI: 10.7759/cureus.9209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Endovascular repair of an abdominal aortic aneurysm (AAA) is a widely accepted alternative to open surgical AAA repair. A ruptured AAA is among the emergency surgeries with the highest risk of death, with an overall mortality rate close to90%. However, the classic symptom triad for ruptured AAAs of hypotension, a pulsatile mass, and abdominal/back pain is seen in only in 25% to 50% of affected patients. Thus, many present with symptoms and signs that suggest adifferent diagnosis. Recognizing uncommon presentations and limitations of imaging and interpretation, in addition to clinical gestalt, can save many lives. This report discusses an unusual case involving a previously repaired AAA presenting with acute rupture at the endograft site.
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220
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Valentine EA, Gold AK, Ochroch EA. The Year in Vascular Anesthesia: Selected Highlights From 2019. J Cardiothorac Vasc Anesth 2020; 34:2906-2912. [PMID: 32826135 DOI: 10.1053/j.jvca.2020.07.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Elizabeth A Valentine
- Department of Anesthesiology and Critical Care, Division of Cardiovascular and Thoracic Anesthesiology, Perelman School of Medicine at the University of Pennsylvania, Hospital of the University of Pennsylvania, Philadelphia, PA.
| | - Andrew K Gold
- Department of Anesthesiology and Critical Care, Division of Cardiovascular and Thoracic Anesthesiology, Perelman School of Medicine at the University of Pennsylvania, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - E Andrew Ochroch
- Department of Anesthesiology and Critical Care, Division of Cardiovascular and Thoracic Anesthesiology, Perelman School of Medicine at the University of Pennsylvania, Hospital of the University of Pennsylvania, Philadelphia, PA
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221
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Use of intravascular ultrasound in endovascular repair of abdominal aortic aneurysm. ADVANCES IN INTERVENTIONAL CARDIOLOGY 2020; 16:202-205. [PMID: 32636907 PMCID: PMC7333188 DOI: 10.5114/aic.2020.96065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 03/17/2020] [Indexed: 11/17/2022] Open
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222
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Morisaki K, Furuyama T, Yoshiya K, Kurose S, Yoshino S, Nakayama K, Yamashita S, Kawakubo E, Matsumoto T, Mori M. Frailty in patients with abdominal aortic aneurysm predicts prognosis after elective endovascular aneurysm repair. J Vasc Surg 2020; 72:138-143. [DOI: 10.1016/j.jvs.2019.09.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 09/23/2019] [Indexed: 12/21/2022]
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223
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Midy D, Bastrot L, Belhomme D, Faroy F, Frisch N, Bouillanne PJ, Delaunay T, Aguilar P, Francis-Oliviero F, Caradu C, Belhomme D, Faroy F, Frisch N, Midy D, Bouillanne PJ, Delaunay T, Aguilar P, Hoehne M, Gheysens B, Gardet E, Maillard P, Chakfe N, Mugnier B, Rossi A, Malikov S, El Douaihy M, Grognet A, Nicolini P, Moumouni Y, Magne JL, Gayet P, Calen S. Five Year Results of the French EPI-ANA-01 Registry of AnacondaTM Endografts in the Treatment of Infrarenal Abdominal Aortic Aneurysms. Eur J Vasc Endovasc Surg 2020; 60:16-25. [DOI: 10.1016/j.ejvs.2020.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/12/2020] [Accepted: 02/05/2020] [Indexed: 10/24/2022]
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224
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Impact of Gradual Adoption of EVAR in Elective Repair of Abdominal Aortic Aneurysm: A Retrospective Cohort Study from 2009 to 2015. Ann Vasc Surg 2020; 70:411-424. [PMID: 32615203 DOI: 10.1016/j.avsg.2020.06.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/04/2020] [Accepted: 06/12/2020] [Indexed: 11/23/2022]
Abstract
INTRODUCTION The recommendations about the preferred type of elective repair of abdominal aortic aneurysm (AAA) still divides guidelines committees, even nowadays. The aim is to assess outcomes after AAA repair focusing on differences between endovascular aneurysm repair (EVAR) and open surgical repair (OSR). METHODS The observational retrospective cohort study of consecutive patients submitted to elective AAA repair at a tertiary center, 2009-2015. Exclusion criteria were as follows: nonelective cases or complex aortic aneurysms. Primary outcomes were postoperative complications, length of hospital stay, survival, freedom from aortic-related mortality, and vascular reintervention. Time trends were assessed along the period under analysis. RESULTS From a total of 211 included patients, those submitted to EVAR were older (74 ± 7 vs. 67 ± 9 years; P < 0.001), presented a higher prevalence of hypertension (83.5% vs. 68.5%, P = 0.004), obesity (28.7% vs. 14.3%, P = 0.029), previous cardiac revascularization (30.5% vs. 14.7%, P = 0.005), heart failure (17.2% vs. 5.2%, P = 0.013), and chronic obstructive pulmonary disease (32.8% vs. 13.3%, P = 0.002). Patients were followed during a median of 49 months. EVAR resulted in a significantly shorter length of hospital stay (median 4 and interquartile range 3 vs. 8 (9); P < 0.001), lower 30-day complications (10.6% vs. 22.8%, P = 0.017), lower aortic-related mortality, and similar reintervention after adjustment with a propensity score. Along the time under analysis, EVAR became the predominate type of repair (P = 0.024), the proportion of complications decreased (P = 0.014), and the 30-day mortality (P = 0.035). CONCLUSIONS Although EVAR was offered to patients with more comorbidities, better and durable outcomes were achieved after EVAR, favoring its adoption for elective AAA repair.
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225
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Lee JH, Park KH, Kwak SG. Changes in Neck Angle, Neck Length, Maximum Diameter, Maximum Area and Thrombus after Endovascular Aneurysm Repair. Vasc Specialist Int 2020; 36:82-88. [PMID: 32611840 PMCID: PMC7333090 DOI: 10.5758/vsi.190054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 03/16/2020] [Accepted: 05/22/2020] [Indexed: 11/20/2022] Open
Abstract
Purpose The correlation of initial anatomy of the aneurysm, aneurysmal remodeling and endoleaks is controversial. We performed a retrospective study to measure aneurysmal remodeling with time, and to assess the structural changes in the aneurysm neck after endovascular aneurysm repair (EVAR). Materials and Methods From January 2013 to February 2018, 108 patients with abdominal aortic aneurysms (AAA) underwent EVAR. Follow-up computed tomography images were available for 90 patients. Anatomic variables, including the neck angle, neck length, maximal diameter, maximal area, and thrombus volume were measured. Temporal changes were measured preoperatively, immediate postoperatively (within 1 week after EVAR), and at 6 months, 1 year, and 2 years post-EVAR. Correlation between the variables according to the temporal changes and presence of type Ia endoleaks (T1aE) was analyzed. Results The mean follow-up period was 10.63±20.34 months. Significant decreases in neck angle and length occurred immediately postoperative (P<0.001 and 0.036). Maximum diameter decreased at 6 months post-EVAR (P=0.003), but no significant changes in the maximal area occurred over time (P=0.142). Thrombus volume in the aneurysm sac increased immediately post-EVAR (P=0.008). There was no significant relationship between T1aE and neck changes in the group and time comparison (P=0.815 and 0.970). Conclusion Changes in neck angle, length and thrombus volume occurred immediately after EVAR, whereas a change in the maximum diameter of the AAA was noted 6 months after EVAR. Preoperative anatomic variables related with T1aE were not found.
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Affiliation(s)
- Jae Hoon Lee
- Division of Vascular and Endovascular Surgery, Department of Surgery, College of Medicine, Daegu Catholic University, Daegu, Korea
| | - Ki Hyuk Park
- Division of Vascular and Endovascular Surgery, Department of Surgery, College of Medicine, Daegu Catholic University, Daegu, Korea
| | - Sang Gyu Kwak
- Department of Medical Statistics, College of Medicine, Daegu Catholic University, Daegu, Korea
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226
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Reporting standards for endovascular aortic repair of aneurysms involving the renal-mesenteric arteries. J Vasc Surg 2020; 73:4S-52S. [PMID: 32615285 DOI: 10.1016/j.jvs.2020.06.011] [Citation(s) in RCA: 242] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 06/05/2020] [Indexed: 12/14/2022]
Abstract
Endovascular aortic aneurysm repair of complex aortic aneurysms requires incorporation of side branches using specially designed aortic stent grafts with fenestrations, directional branches, or parallel stent grafts. These techniques have been increasingly used and reported in the literature. The purpose of this document is to clarify and to update terminology, classification systems, measurement techniques, and end point definitions that are recommended for reports dealing with endovascular repair of complex abdominal and thoracoabdominal aortic aneurysms involving the renal and mesenteric arteries.
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227
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Abstract
Endovascular aneurysm repair (EVAR) is now the preferred procedure for abdominal aortic aneurysm repair. As a result of the need for fluoroscopy during EVAR, radiation exposure is a potential hazard. We studied the quantity of radiation delivered during EVAR to identify risks for excessive exposure. Fluoroscopy time, contrast volume used, and procedural details were recorded prospectively during EVARs. Using data collected from similar EVARs, an equation was derived to calculate approximate dose-area product (DAP) from fluoroscopy time. DAP values were then compared between procedures in which a relevant postdeployment procedure (PDP) was necessary intraoperatively with those without. Clinical data on 17 patients were collected. The mean age of patients was 68 (±9) years. Fluoroscopy times and approximate DAP values were found to be significantly higher in the seven patients with a PDP compared with the 10 patients without an intraoperative PDP (31.2 [±9.6] vs 22.7 [±6.0] minutes, P = 0.033 and 537 [±165] vs 390 [±103] Gy-cm2, P = 0.033, respectively). The average amount of contrast volume used was not significantly different between groups. Radiation emitted during EVARs with PDPs was significantly greater relative to those without PDPs. Device design and operators should thus aim to decrease PDPs and to minimize fluoroscopy time.
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Affiliation(s)
- Michael Butler
- From the Department of Surgery, University of California, Irvine Medical Center, Orange, California; and the Surgical Service, Veterans Administration Medical Center, Long Beach, California
| | - Madhukar S. Patel
- From the Department of Surgery, University of California, Irvine Medical Center, Orange, California; and the Surgical Service, Veterans Administration Medical Center, Long Beach, California
| | - Samuel E. Wilson
- From the Department of Surgery, University of California, Irvine Medical Center, Orange, California; and the Surgical Service, Veterans Administration Medical Center, Long Beach, California
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Qiao L, Tan KT, Byrne JS. Type IA endoleak caused by interlocked suprarenal bare-metal stents after endovascular abdominal aortic aneurysm repair with successful endovascular rescue. JOURNAL OF VASCULAR SURGERY CASES INNOVATIONS AND TECHNIQUES 2020; 6:277-281. [PMID: 32510033 PMCID: PMC7265066 DOI: 10.1016/j.jvscit.2020.02.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/24/2020] [Indexed: 11/15/2022]
Abstract
A physically active 90-year-old man underwent endovascular repair of an asymptomatic but enlarging abdominal aortic aneurysm. Postoperative computed tomography demonstrated entanglement of nonadjacent proximal bare-metal stents. This was associated with graft infolding and a type IA endoleak. The patient underwent percutaneous transluminal angioplasty and placement of a Palmaz stent. Subsequent surveillance imaging showed resolution of the type I endoleak >1 year later. This report demonstrates an uncommon cause of stent graft infolding, an already rare complication of endovascular aneurysm repair, and highlights the need to carefully assess the morphologic appearance of the proximal fixation stents after graft deployment.
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Affiliation(s)
- Lyon Qiao
- Division of Vascular Surgery, Department of Surgery, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Kong Teng Tan
- Division of Interventional Radiology, Joint Department of Medical Imaging, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - John S Byrne
- Division of Vascular Surgery, Department of Surgery, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Schmid BP, Polsin LLM, Menezes FH. Dilatation of Aortic Neck and Common Iliac Arteries after Open Repair of Abdominal Aortic Aneurysms: Long-Term Follow-Up According to Aortic Reconstruction Configuration. Ann Vasc Surg 2020; 69:345-351. [PMID: 32504789 DOI: 10.1016/j.avsg.2020.05.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/14/2020] [Accepted: 05/16/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND Several studies in the literature report continued proximal aorta and distal iliac artery dilatation after surgical correction of an abdominal aortic aneurysm (AAA). The purpose of this study is to evaluate these findings, in a South American population, and relate them to the type of configuration of the open procedure aortic reconstruction. METHODS This is a retrospective review of ultrasonographic follow-up of patients submitted to open repair of AAA from 1989 to 2013, reporting proximal aorta dilatation (≥3 cm) and distal iliac artery dilatation (≥1.5 cm). RESULTS A total of 155 patients were included. Life-table freedom at the intervals 11 < 15 years and ≥15 years were 47% and 23% for proximal dilatation and 63% and 38% for distal iliac arteries dilatation, respectively. There were more proximal and distal dilatations in patients submitted to more extensive aortic reconstructions (aorto-aortic 13% and 22% vs aorto-bilateral common iliacs 27% and 8% vs aorto-unilateral or bilateral external iliacs 27% and 32% and aorto-femoral 67% and 0%) P < 0.0001. Juxtarenal anastomosis was also correlated with more proximal dilatations (42% vs 21%, P = 0,046). There were two proximal and three distal anastomosis pseudoaneurysms. CONCLUSIONS The presence of more extensive degenerative disease at the time of operation, requiring juxtarenal or more distal iliac reconstructions, may pose an increased risk of proximal aorta and iliac artery dilatation during follow-up. This study corroborates that significant changes are found after 7 to 10 years of the operation, reinforcing the need for long-term monitoring.
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Affiliation(s)
- Bruno Pagnin Schmid
- Discipline of Vascular Surgery, Department of Surgery, Hospital of Clinics of the Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | | | - Fábio Hüsemann Menezes
- Discipline of Vascular Surgery, Department of Surgery, Hospital of Clinics of the Faculty of Medical Sciences of the State University of Campinas (UNICAMP), Campinas, SP, Brazil
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Tenorio ER, Oderich GS, Sandri GA, Ozbek P, Kärkkäinen JM, Vrtiska T, Macedo TA, Gloviczki P. Prospective nonrandomized study to evaluate cone beam computed tomography for technical assessment of standard and complex endovascular aortic repair. J Vasc Surg 2020; 71:1982-1993.e5. [DOI: 10.1016/j.jvs.2019.07.080] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/19/2019] [Indexed: 11/27/2022]
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Jean-Baptiste E, Feugier P, Cruzel C, Sarlon-Bartoli G, Reix T, Steinmetz E, Chaufour X, Chavent B, Salomon du Mont L, Ejargue M, Maurel B, Spear R, Midy D, Thaveau F, Desgranges P, Rosset E, Hassen-Khodja R, Bureau P, Ravoux M, Bozzetto C, Sevestre-Pietri MA, Terriat B, Favier C, Degeilh M, Le Hello C, Favre JP, Rinckenbach S, Loppinet A, Goueffic Y, Connault J, Alimi Y, Barthélémy P, Magne JL, Seinturier C, Choukroun ML, Rouyer O, Bitton L, Becquemin JP. Computed Tomography-Aortography Versus Color-Duplex Ultrasound for Surveillance of Endovascular Abdominal Aortic Aneurysm Repair. Circ Cardiovasc Imaging 2020; 13:e009886. [DOI: 10.1161/circimaging.119.009886] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background
Color-duplex ultrasonography (DUS) could be an alternative to computed tomography-aortography (CTA) in the lifelong surveillance of patients after endovascular aneurysm repair (EVAR), but there is currently no level 1 evidence. The aim of this study was to assess the diagnostic accuracy of DUS as an alternative to CTA for the follow-up of post-EVAR patients.
Methods
Between December 16, 2010, and June 12, 2015, we conducted a prospective, blinded, diagnostic-accuracy study, in 15 French university hospitals where EVAR was commonly performed. Participants were followed up using both DUS and CTA in a mutually blinded setup until the end of the study or until any major aneurysm-related morphological abnormality requiring reintervention or an amendment to the follow-up policy was revealed by CTA. Database was locked on October 2, 2017. Our main outcome measures were sensitivity, specificity, positive predictive value, negative predictive value, positive and negative likelihood ratios of DUS against reference standard CTA. CIs are binomial 95% CI.
Results
This study recruited prospectively 659 post-EVAR patients of whom 539 (82%) were eligible for further analysis. Following the baseline inclusion visit, 940 additional follow-up visits were performed in the 539 patients. Major aneurysm-related morphological abnormalities were revealed by CTA in 103 patients (17.2/100 person-years [95% CI, 13.9–20.5]). DUS accurately identified 40 patients where a major aneurysm-related morphological abnormality was present (sensitivity, 39% [95% CI, 29–48]) and 403 of 436 patients with negative CTA (specificity, 92% [95% CI, 90–95]). The negative predictive value and positive predictive value of DUS were 92% (95% CI, 90–95) and 39% (95% CI, 27–50), respectively. The positive likelihood ratio was 4.87 (95% CI, 2.9–9.6). DUS sensitivity reached 73% (95% CI, 51–96) in patients requiring an effective reintervention.
Conclusions
DUS had an overall low sensitivity in the follow-up of patients after EVAR, but its performance improved meaningfully when the subset of patients requiring effective reinterventions was considered.
Registration
URL:
https://www.clinicaltrials.gov
; Unique identifier: NCT01230203.
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Affiliation(s)
- Elixène Jean-Baptiste
- Service de Chirurgie Vasculaire, INSERM U1065, CHU de Nice, Université Côte D’Azur, Nice, France (E.J.-B., R.H.-K.)
| | - Patrick Feugier
- Service de Chirurgie Vasculaire, CHU Edouard Herriot, Université Claude Bernard Lyon1, Lyon, France (P.F.)
| | - Coralie Cruzel
- Délégation à la Recherche Clinique et à l’innovation, CHU de Nice, Université Côte D’Azur, Nice, France (C.C.)
| | - Gabrielle Sarlon-Bartoli
- C2VN, APHM, CHU Timone, Service de Chirurgie Vasculaire, Aix Marseille Université, Marseille, France (G.S.-B.)
| | - Thierry Reix
- Service de Chirurgie Vasculaire, CHU Amiens-Picardie, Université de Picardie Jules Verne, Amiens, France (T.R.)
| | - Eric Steinmetz
- Service de Chirurgie Vasculaire, CHU Dijon-Bourgogne, Université de Bourgogne, Dijon, France (E.S.)
| | - Xavier Chaufour
- Service de Chirurgie Vasculaire et angiologie, CHU de Toulouse, Université Paul Sabatier, Toulouse, France (X.C.)
| | - Bertrand Chavent
- Service de Chirurgie Cardio-Vasculaire, CHU de Saint-Etienne, Université Jean Monnet, Saint-Etienne, France (B.C.)
| | - Lucie Salomon du Mont
- Service de Chirurgie Vasculaire et Endovasculaire, CHU de Besançon, Université de Franche-Comté, Besançon, France (L.S.d.M.)
| | - Meghann Ejargue
- AP-HM, Department of Vascular Surgery, University Hospital Nord, Aix-Marseille Université, Marseille, France (M.E.)
| | - Blandine Maurel
- CHU Nantes, l’institut du thorax, service de chirurgie vasculaire, Inserm-UN UMR-957, Nantes, France (B.M.)
| | - Rafaelle Spear
- Service de Chirurgie Vasculaire, CHU de Grenoble, Université Grenoble-Alpes, Grenoble, France (R.S.)
| | - Dominique Midy
- Service de Chirurgie Vasculaire, CHU de Bordeaux, Bordeaux, France (D.M.)
| | - Fabien Thaveau
- Service de Chirurgie Vasculaire, CHU de Strasbourg, Strasbourg, France (F.T.)
| | - Pascal Desgranges
- Service de Chirurgie Vasculaire, CHU Henri Mondor, Créteil, France (P.D.)
| | - Eugenio Rosset
- Service de Chirurgie Vasculaire, CHU de Clermont-Ferrand, Université d’Auvergne, Clermont-Ferrand, France (E.R.)
| | - Réda Hassen-Khodja
- Service de Chirurgie Vasculaire, INSERM U1065, CHU de Nice, Université Côte D’Azur, Nice, France (E.J.-B., R.H.-K.)
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Mathlouthi A, Locham S, Dakour-Aridi H, Black JH, Malas MB. Impact of suprarenal neck angulation on endovascular aneurysm repair outcomes. J Vasc Surg 2020; 71:1900-1906. [DOI: 10.1016/j.jvs.2019.08.250] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 08/03/2019] [Indexed: 11/30/2022]
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233
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Barleben A, Quinones-Baldrich W, Mogannam A, Archie M, Lane JS, Malas M. Midterm evaluation of perigraft arterial sac embolization in endovascular aneurysm repair. J Vasc Surg 2020; 72:1960-1967. [PMID: 32471739 DOI: 10.1016/j.jvs.2020.01.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 01/22/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Management of clinically significant endoleaks (ELs) remains costly, time-consuming, and morbid. Unresolved ELs can result in rupture and mortality after endovascular aneurysm repair (EVAR). Perigraft arterial sac embolization (PASE) has been used to treat ELs diagnosed at the time of EVAR or during surveillance. METHODS A retrospective review of prospectively maintained databases was conducted. The databases were compiled from two institutions between 2006 and 2016. PASE was performed for type I, type II, or type III EL with a thrombin, contrast medium, and Gelfoam (Pfizer, New York, NY) slurry prepared as previously described. PASE was administered either at the time of EVAR (primary) or during surveillance (secondary). Safety end points included nontarget embolization, defined as neurologic or enteric clinical sequelae from lumbar artery or visceral artery embolization, allergic reaction, peripheral embolization, or rupture. Efficacy end points included successful resolution of EL and cessation of aneurysm sac growth on computed tomography (CT) scans with contrast enhancement. RESULTS A total of 66 patients included in the study were treated with PASE. Primary PASE was performed in 38 patients (58%) and secondary in 28 (42%). Within the total cohort, the average clinical and CT scan follow-up was 1.7 years (0.1-11.6 years). Four patients required open repair for residual high-pressure ELs (one type IIIB and three type I; 6%). Of the 95% of patients who did not require open conversion, aneurysm growth did not occur during the follow-up period. In the overall cohort, PASE was successful in 88% of type I EL and 73% of patients with type II EL. There was no evidence of recanalization after thrombosis of culprit vessel for EL. No patients suffered nontarget embolization, spinal ischemia, allergic reaction, post-EVAR rupture, or colonic ischemia. CONCLUSIONS Primary and secondary PASE proved to be a safe, effective, and durable tool in sac management in conjunction with EVAR. Treating ELs during or after EVAR with PASE has minimized the incidence of EL on CT scan and halted aneurysm growth in our cohort. Further studies are needed to confirm the long-term durability of PASE in reducing secondary interventions after EVAR.
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Affiliation(s)
- Andrew Barleben
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Diego, Calif.
| | - William Quinones-Baldrich
- Division of Vascular and Endovaascular Surgery, Department of Surgery, University of California, Los Angeles, Calif
| | - Abid Mogannam
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Diego, Calif
| | - Meena Archie
- Division of Vascular and Endovaascular Surgery, Department of Surgery, University of California, Los Angeles, Calif
| | - John S Lane
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Diego, Calif
| | - Mahmoud Malas
- Division of Vascular and Endovascular Surgery, Department of Surgery, University of California, San Diego, Calif
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234
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Financial viability of endovascular aortic repair in the modern era. J Vasc Surg 2020; 73:494-501. [PMID: 32473346 DOI: 10.1016/j.jvs.2020.05.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 05/14/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND In the current era of cost containment, the financial impact of high-cost procedures such as endovascular aneurysm repair (EVAR) remains an area of intensive interest. Previous reports suggested slim to negative operating margins with EVAR, prompting widespread initiatives to reduce cost and to improve reimbursement. In 2015, the Centers for Medicare and Medicaid Services (CMS) announced the reclassification of EVAR to more specific diagnosis-related group (DRG) coding and predicted an overall increase in hospital reimbursement. The potential impact of this change has not been described. METHODS Patients undergoing elective EVAR at a single institution between January 2014 and December 2018 were identified retrospectively, then stratified by date. Group 1 patients underwent EVAR before DRG change in 2015 and were classified with DRG 237/238, major cardiovascular procedure. Group 2 patients underwent EVAR after the change and were classified as DRG 268/269, aortic/heart assist procedures. The total direct cost included implant cost, operating room (OR) labor, room and board, and other supply costs. Net revenue reflected real payer mix values without extrapolation based on standard Medicare rates. Hospital profit was defined as the contribution to indirect (CTI), subtracting total direct cost from net revenue. RESULTS A total of 188 encounters were included, 67 (36%) in group 1 and 121 (64%) in group 2. Medicare patients composed 84% of group 1 and 81% of group 2. CTI (profit) increased by $4447 (+123%) from $3615 in group 1 to $8062 in group 2. Net revenue per encounter increased by $2054 (+7.1%). In group 1, the higher reimbursement DRG code 237 was applied in 5 of 67 (7.5%) patients, whereas DRG code 268 was assigned in 19 of 121 (15.1%) patients in group 2. Total direct cost per encounter decreased by $2012 (-7.9%). This decrease in cost was driven by a reduction in implant cost, from a mean $16,914 per encounter in group 1 to a mean $15,655 in group 2 (-$1259 or -7.4% per encounter) and by a decrease in OR labor cost, $2838 in group 1 to $2361 in group 2 (-$477 or -17.0% per encounter). CONCLUSIONS A significant improvement in hospital CTI was observed for elective EVAR during the course of the study. The increased DRG reimbursement after the Centers for Medicare and Medicaid Services coding changes in 2015 was a major driver of this salutary change. Notably, efforts to reduce implant and OR cost as well as to improve coding and documentation accuracy over time had an equally important impact on financial return.
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235
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Cost-effectiveness of contrast-enhanced ultrasound for the detection of endovascular aneurysm repair-related endoleaks requiring treatment. J Vasc Surg 2020; 73:232-239.e2. [PMID: 32442612 DOI: 10.1016/j.jvs.2020.04.512] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 04/18/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Follow-up after endovascular aneurysm repair is necessary to detect potentially life-threatening complications such as endoleaks. Computed tomography angiography (CTA) or magnetic resonance angiography (MRA) is often used as standard of care for follow-up. Contrast-enhanced ultrasound (CEUS) has been shown to be a viable and fast real-time nonionizing imaging modality with equivalent diagnostic accuracy while also being superior to color Doppler ultrasound. The aim of this cost-utility analysis was to evaluate the cost-effectiveness of this imaging method in comparison to others for the evaluation of endoleaks requiring treatment. METHODS A decision model based on Markov simulations estimated lifetime costs and quality-adjusted life years (QALYs) associated with CTA, MRA, CEUS, and color Doppler ultrasound. Model input parameters were obtained from recent literature. The applied sensitivity and specificity values amounted to 90.5% and 100.0% for CTA, 96.0% and 100.0% for MRA, 94.0% and 95.0% for CEUS, and 82.0% and 93.0% for color Doppler ultrasound. Probabilistic and deterministic sensitivity analysis was performed to estimate uncertainty of model results. To evaluate cost-effectiveness, incremental cost-effectiveness ratios were reported as a measure representing the economic value of a strategy compared with an alternative. The willingness to pay was set to $100,000/QALY. RESULTS In the base-case scenario for a willingness to pay of $100,000 per QALY, CEUS was the most cost-effective of the four diagnostic strategies with estimated costs of $17,383 and effectiveness of 9.770 QALYs. CTA was estimated to result in lifetime costs of $17,679 with an expected effectiveness of 9.768 QALYs, whereas color Doppler ultrasound showed expected costs of $17,287 with 9.763 QALYs. Expected costs and effectiveness of MRA amounted to $17,945 and 9.771 QALYs each. Base-case estimates of the incremental cost-effectiveness ratios for CEUS vs color Doppler ultrasound equaled $14,173.52/QALY. CONCLUSIONS CEUS is a cost-effective imaging method for the evaluation of therapy-requiring endoleaks in endovascular aneurysm repair surveillance.
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Eleshra A, Oderich GS, Spanos K, Panuccio G, Kärkkäinen JM, Tenorio ER, Kölbel T. Short-term outcomes of the t-Branch off-the-shelf multibranched stent graft for reintervention after previous infrarenal aortic repair. J Vasc Surg 2020; 72:1558-1566. [PMID: 32423775 DOI: 10.1016/j.jvs.2020.02.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 02/03/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The purpose of this study was to evaluate the outcome of t-Branch (Cook Medical, Bloomington, Ind) stent graft for the treatment of thoracoabdominal and pararenal aortic aneurysms in patients who had previous infrarenal aortic repair. METHODS A retrospective two-center study was undertaken. All consecutive patients who underwent endovascular repair using t-Branch stent graft after previous infrarenal aortic repair between January 2010 and August 2018 were included. Demographics, past medical history, cardiovascular risk factors, and intraoperative and perioperative details were recorded. Technical success and early (30-day) mortality, morbidity, target vessel patency, and presence of endoleak were analyzed. During the first year of follow-up, survival, freedom from reintervention, and patency rates were recorded. RESULTS There were 32 patients (mean age, 74 ± 7 years; 81% male) included in the study; 24 (75%) patients had prior open surgical repair, and 8 (25%) patients had undergone standard endovascular aneurysm repair. The index operation was performed 9 ± 5 years earlier, including 10 ± 5 years for open surgical repair and 8 ± 6 years for endovascular aortic repair. The indication was progression of the disease in 26 patients (81%) and type IA endoleak in 6 patients (19%). The total number of target vessels incorporated was 117 arteries (3.8 ± 0.6 target vessels per patient). Eleven patients had only three vessels incorporated; celiac trunk was occluded in three patients, and eight patients had one functioning kidney. Technical success rate was 97% (31/32). There was a single technical failure in one patient who had a type IA endoleak after endovascular repair with suprarenal fixation. The stenotic right renal artery was not catheterized at the initial procedure, and retrograde access was achieved through a right subcostal incision 3 days later with successful completion of the repair. Early mortality rate was 13%, and spinal cord ischemia rate was 22% (7/32); four patients had permanent and three had transient neurologic deficits. Early target vessel patency was 100%, and the rate of any endoleak was 9% (3/32); two patients had type II endoleaks and one patient had type III endoleak. The mean follow-up was 5.4 ± 5.9 months. The cumulative survival rate was 82% and 73% at 6 and 12 months, respectively. The freedom from aorta-related mortality was 92% at 6 and 12 months. The cumulative freedom from reintervention during follow-up was 90% at 6 and 12 months. The overall target vessel patency rate was 100% and 97.5% at 6 and 12 months, respectively. CONCLUSIONS The use of t-Branch off-the-shelf stent graft for the treatment of aortic disease in patients who had previous infrarenal aortic repair appears to be feasible, with acceptable early outcomes in terms of morbidity and mortality.
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Affiliation(s)
- Ahmed Eleshra
- Department of Vascular Medicine, German Aortic Center, University Heart & Vascular Center Hamburg, Hamburg, Germany.
| | - Gustavo S Oderich
- Division of Vascular and Endovascular Surgery, Advanced Endovascular Aortic Research Program, Mayo Clinic, Rochester, Minn
| | - Konstantinos Spanos
- Department of Vascular Medicine, German Aortic Center, University Heart & Vascular Center Hamburg, Hamburg, Germany
| | - Giuseppe Panuccio
- Department of Vascular Medicine, German Aortic Center, University Heart & Vascular Center Hamburg, Hamburg, Germany
| | - Jussi M Kärkkäinen
- Division of Vascular and Endovascular Surgery, Advanced Endovascular Aortic Research Program, Mayo Clinic, Rochester, Minn
| | - Emanuel R Tenorio
- Division of Vascular and Endovascular Surgery, Advanced Endovascular Aortic Research Program, Mayo Clinic, Rochester, Minn
| | - Tilo Kölbel
- Department of Vascular Medicine, German Aortic Center, University Heart & Vascular Center Hamburg, Hamburg, Germany
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237
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Chinsakchai K, Suksusilp P, Wongwanit C, Hongku K, Hahtapornsawan S, Puangpunngam N, Moll FL, Sermsathanasawadi N, Ruangsetakit C, Mutirangura P. Early and late outcomes of endovascular aneurysm repair to treat abdominal aortic aneurysm compared between severe and non-severe infrarenal neck angulation. Vascular 2020; 28:683-691. [DOI: 10.1177/1708538120924552] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Abdominal aortic aneurysm with severe infrarenal neck angle (>60°) has long been thought to be an obstacle to endovascular aneurysm repair. However, some previous studies reported endovascular aneurysm repair to be safe and efficacious for treating abdominal aortic aneurysm in patients with severe neck angulation. The aim of this study was to investigate the early and late outcomes of endovascular aneurysm repair to treat abdominal aortic aneurysm compared between patients with severe and non-severe infrarenal neck angulation. Methods Fifty-four severe and 144 non-severe neck angulation patients who were treated at Siriraj Hospital (Bangkok, Thailand) during January 2010–October 2013 were recruited. The primary endpoints were intraoperative neck complications (e.g., type 1A endoleak or proximal graft migration) and immediate adjunct aortic neck procedures. The secondary endpoints included perioperative mortality, overall survival, and the proportion of patients that were reintervention-free at five years compared between the severe and non-severe groups. Results Severe angulation patients were significantly older than non-severe angulation patients (77 ± 6.3 vs. 74 ± 7.9 years; p = 0.021). The median proximal angle was significantly greater in the severe group (82° vs. 13.5°; p < 0.001). Intraoperative proximal neck complications developed in 29.6% of patients in the severe angulation group compared with 9.0% in the non-severe group ( p < 0.001). Significantly more patients in the severe group required intraoperative adjunct procedures (29.6% vs. 7.6%; p < 0.001). There was no significant difference in perioperative mortality between groups. At the five-year follow-up, there was no significant difference between groups for overall survival or the proportion of patients that remained reintervention-free. Conclusions Endovascular aneurysm repair to treat abdominal aortic aneurysm in patients with severe proximal neck angulation is technically feasible and safe Although the severe angulation group had a higher rate of intraoperative neck complications and immediate adjunct neck procedures than the non-severe group, there was no significant difference between groups for 30-day mortality, overall survival or the proportion of patients who remained reintervention-free at five years.
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Affiliation(s)
- Khamin Chinsakchai
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pichawat Suksusilp
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chumpol Wongwanit
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kiattisak Hongku
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Suteekhanit Hahtapornsawan
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Nattawut Puangpunngam
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Frans L Moll
- Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Nuttawut Sermsathanasawadi
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chanean Ruangsetakit
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Pramook Mutirangura
- Division of Vascular Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Ahn S, Min JY, Kim HG, Mo H, Min SK, Min S, Ha J, Min KB. Outcomes after aortic aneurysm repair in patients with history of cancer: a nationwide dataset analysis. BMC Surg 2020; 20:85. [PMID: 32357930 PMCID: PMC7195758 DOI: 10.1186/s12893-020-00754-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 04/22/2020] [Indexed: 12/03/2022] Open
Abstract
Background Synchronous cancer in patients with abdominal aortic aneurysm (AAA) increases morbidity and mortality after AAA repair. However, little is known about the impact of the history of cancer on mortality after AAA repair. Methods Patients with intact AAA who were treated with endovascular aneurysm repair or open surgical repair were selected from the Health Insurance and Review Assessment data in South Korea between 2007 and 2016. Primary endpoints included the 30- and 90-day mortality and long-term mortality after AAA repair. The Cox proportional hazards models were constructed to evaluate independent predictors of mortality. Results A total of 1999 patients (17.0%, 1999/11785) were diagnosed with cancer prior to the AAA repair. History of cancer generally had no effect in short-term mortality at 30 and 90 days. However, short-term mortality rate of patients with a history of lung cancer was more than twice that of patients without it (3.07% vs. 1.06%, P = 0.0038, 6.14% vs. 2.69%, P = 0.0016). Furthermore, the mortality rate at the end of the study period was significantly higher in AAA patients with a history of cancer than in those without a history of cancer (21.21% vs. 17.08%, P < .0001, HR, 1.31, 95% CI, 1.17–1.46). Conclusions The history of cancer in AAA patients increases long-term mortality but does not affect short-term mortality after AAA repair. However, AAA repair could increase both short- and long-term mortality in patients with lung cancer history, and those cases should be more carefully selected.
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Affiliation(s)
- Sanghyun Ahn
- Division of Vascular Surgery, Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jin-Young Min
- Institute of Health and Environment, Seoul National University, Seoul, Republic of Korea
| | - Hyunyoung G Kim
- Department of Family and Community Medicine, University of Texas Health Sciences Center at San Antonio, San Antonio, TX, USA
| | - Hyejin Mo
- Division of Vascular Surgery, Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seung-Kee Min
- Division of Vascular Surgery, Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sangil Min
- Division of Vascular Surgery, Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jongwon Ha
- Division of Vascular Surgery, Department of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyoung-Bok Min
- Department of Preventive Medicine, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul, 110-799, Republic of Korea.
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Karthaus EG, Vahl A, Elsman BHP, Wouters MWJM, de Borst GJ, Hamming JF. National Numbers of Secondary Aortic Reinterventions after Primary Abdominal Aortic Aneurysm Surgery from the Dutch Surgical Aneurysm Audit. Ann Vasc Surg 2020; 68:234-244. [PMID: 32335253 DOI: 10.1016/j.avsg.2020.04.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/29/2020] [Accepted: 04/07/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Long-term secondary aortic reinterventions (SARs) can be a sign of (lack of) effectiveness of abdominal aortic aneurysm (AAA) surgery. This study provides insight into the national number of SARs after primary AAA repair by endovascular aneurysm repair (EVAR) or by open surgical repair in the Netherlands. METHODS Observational study included all patients undergoing SAR between 2016 and 2017, registered in the compulsory Dutch Surgical Aneurysm Audit (DSAA). The DSAA started in 2013, SARs are registered from 2016. Characteristics of SAR and postoperative outcomes (mortality/complications) were analyzed, stratified by urgency of SAR. Data of SARs were merged with data of their preceded primary AAA repair, registered in the DSAA after January 2013. In these patients undergoing SAR, treatment characteristics of the preceded primary AAA repair were additionally described, with focus on differences between stent grafts. RESULTS Between 2016 and 2017, 691 patients underwent SAR, this concerned 9.3% of all AAA procedures (infrarenal/juxtarenal/suprarenal) in the Netherlands (77% elective/11% acute symptomatic/12% ruptured). Endoleak (60%) was the most frequent indication for SAR. SARs were performed with EVAR in 66%. Postoperative mortalities after SAR were 3.4%, 11%, and 29% in elective, acute symptomatic, and ruptured patients, respectively. In 26% (n = 181) of the patients undergoing SAR their primary AAA repair was performed after January 2013 and data of primary and SAR procedures could be merged. In 93% (n = 136), primary AAA repair was EVAR. Endografts primarily used were nitinol/polyester (62%), nitinol/polytetrafluoroethylene (8%), endovascular sealing (21%), and others (9%), compared with their national market share of 76% (odds ratio [OR], 0.52; 95% confidence interval [CI], 0.38-0.71), 15% (OR, 0.50; CI, 0.29-0.89), 4.9% (OR, 5.04; CI, 3.44-7.38), and 4.1% (OR, 2.81; CI, 1.66-4.74), respectively. CONCLUSIONS In the Netherlands, about one-tenth of the annual AAA procedures concerns an SAR. A quarter of this cohort had an SAR within 1-5 years after their primary AAA repair. Most SARs followed after primary EVAR procedures, in which an overrepresentation of endovascular sealing grafts was seen. Postoperative mortality after SAR is comparable with primary AAA repair.
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Affiliation(s)
- Eleonora G Karthaus
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands; Dutch Institute for Clinical Auditing, Leiden, the Netherlands.
| | - Anco Vahl
- Department of Surgery, OLVG, Amsterdam, the Netherlands; Department of Clinical Epidemiology, OLVG, Amsterdam, the Netherlands
| | | | | | - Gert J de Borst
- Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jaap F Hamming
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
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Postimplantation Syndrome Is Not Associated with Myocardial Injury after Noncardiac Surgery after Endovascular Aneurysm Repair. Ann Vasc Surg 2020; 68:275-282. [PMID: 32339692 DOI: 10.1016/j.avsg.2020.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 04/12/2020] [Accepted: 04/15/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Postimplantation syndrome (PIS) is the clinical and biochemical expression of an inflammatory response following endovascular aneurysm repair (EVAR), with a reported incidence ranging from 2% to 100%. Although generally benign, some studies report an association between PIS and postoperative major adverse cardiovascular events (MACEs). Nonetheless, the role of PIS in postoperative myocardial injury after noncardiac surgery (MINS) is unknown. This work aims to evaluate the relationship between PIS and MINS in a subset of EVAR patients, as well as assess the impact of PIS in all-cause mortality. METHODS All patients undergoing elective standard EVAR between January 2008 and June 2017, and with at least one measurement of contemporary (cTnI) or high sensitivity troponin I (hSTnI) in the first 48h after surgery, were retrospectively analyzed. PIS was defined as the presence of fever and leukocytosis in the postoperative period in the absence of infectious complications. MINS was defined as the value exceeding the 99th percentile of a normal reference population with a coefficient of variation <10%, which was >0.032 ng/mL for cTnI and 0.0114 (female) and 0.027 ng/mL (male) for hSTnI. Patients' demographics, comorbidities, medication, access, and anesthesia were also evaluated. RESULTS One hundred thirty-three consecutive patients were included (95.5% male; mean age 75.66 ± 7.13 years). Mean follow-up was 46.35 months. Survival rate was 86.5%, 80.5%, and 57.6% at 1, 3, and 5 years of follow-up, with 2 fatalities at 30 days of follow-up. The prevalence of PIS was 11.4%. MACE occurred in 2.3% of the patients, while MINS was reported in 16.5% of the patients. No association was found between PIS and patients' gender, comorbidities, type of anesthesia, or transfusional support. The type of graft used significantly affected the prevalence of PIS, with all cases reported when polyester grafts were used (P = 0.031). MACE occurred in 2.3% of the patients, while MINS was reported in 16.5% of the patients. PIS was found to be significantly associated with postoperative MACE (P = 0.001), but not MINS. Survival analysis revealed no differences between patients with or without PIS regarding 30-day mortality as well as long-term all-cause mortality. American Society of Anesthesiologists score (hazard ratio [HR] 2.157, 95% confidence interval [CI] 1.07-4.33, P = 0.031) and heart failure (HR 2.284, 95% CI 1.25-4.18, P = 0.008) were found to be independently associated with increased long-term all-cause mortality in this cohort of patients. CONCLUSIONS PIS is a common complication after EVAR, occurring in 11.4% of the patients from this cohort. Graft type seems to significantly affect the risk of PIS, since all reported cases occurred when polyester grafts were used. PIS did not influence 30-day or long-term survival and was found to be significantly associated with postoperative MACE but not MINS, suggesting the involvement of different pathophysiological mechanisms.
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Yokoyama Y, Kuno T, Takagi H. Meta-analysis of phase-specific survival after elective endovascular versus surgical repair of abdominal aortic aneurysm from randomized controlled trials and propensity score-matched studies. J Vasc Surg 2020; 72:1464-1472.e6. [PMID: 32330598 DOI: 10.1016/j.jvs.2020.03.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/18/2020] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Although endovascular aneurysm repair (EVAR) for abdominal aortic aneurysm (AAA) significantly decreases perioperative mortality compared with open surgical repair (OSR), we have not concluded superiority between EVAR and OSR beyond the perioperative period. The aim of this study was to compare phase-specific survival after EVAR vs OSR. METHODS The review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline. Embase and MEDLINE were searched up to November 2019 to identify randomized controlled trials and propensity score-matched studies that investigated ≥2-year all-cause mortality (primary outcome) after EVAR vs OSR for intact infrarenal AAA. For each study, the hazard ratio (HR) with 95% confidence interval (CI) of mortality for EVAR vs OSR was calculated using survival curves for the following specific phases: early term (0-2 years after repair), midterm (2-6 years after repair), long term (6-10 years after repair), and very long term (≥10 years after repair). The risk ratio (RR) in the perioperative (in-hospital or 30-day) period was also extracted. Phase-specific HRs or RRs were separately pooled using the random effects model. Sensitivity analyses were performed by removing one study at a time to confirm that our findings were not derived from any single study. Funnel plot asymmetry was also examined using the linear regression test. RESULTS Our search identified four randomized controlled trials and seven propensity score-matched studies enrolling a total of 106,243 AAA patients assigned to EVAR (n = 53,123) or OSR (n = 53,120). The mortality after EVAR compared with OSR was significantly lower in the perioperative period (RR, 0.39; 95% CI, 0.29-0.51; P < .00001) and similar in the early-term period (HR, 0.93; 95% CI, 0.84-1.03; P = .16). Notably, significantly higher mortality was observed in the EVAR group compared with the OSR group in the midterm period (HR, 1.15; 95% CI, 1.03-1.29; P = .01). However, similar mortality was observed between the EVAR group and the OSR group in the long-term (HR, 1.06; 95% CI, 0.96-1.17; P = .27) and very-long-term (HR, 1.17; 95% CI, 0.93-1.47; P = .19) periods. In sensitivity analyses, the significant benefit of EVAR in the perioperative period and that of OSR in the midterm period were not changed. No funnel plot asymmetry was identified in all analyses. CONCLUSIONS Compared with OSR, EVAR was associated with lower perioperative mortality and higher mortality in the midterm period for intact infrarenal AAA. The superiority of EVAR was absent in the early-term period, and the inferiority of EVAR in the midterm period disappeared in the long-term and very-long-term periods.
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Affiliation(s)
| | - Toshiki Kuno
- Department of Medicine, Icahn School of Medicine at Mount Sinai, Mount Sinai Beth Israel, New York, NY.
| | - Hisato Takagi
- Department of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka, Japan
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Long-term Efficacy of EVAR in Patients Aged Less Than 65 Years with an Infrarenal Abdominal Aortic Aneurysm and Favorable Anatomy. Ann Vasc Surg 2020; 67:283-292. [PMID: 32283305 DOI: 10.1016/j.avsg.2020.03.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/21/2020] [Accepted: 03/22/2020] [Indexed: 11/21/2022]
Abstract
BACKGROUND The aim of this study was to compare early and long-term outcomes of endovascular aneurysm repair (EVAR) versus open surgical repair (OSR) in patients aged ≤ 65 years. METHODS Data of patients aged ≤65 years undergoing infrarenal abdominal aortic aneurysm repair, between 2005 and 2013, were retrospectively reviewed. All EVAR procedures were performed according to the instruction for use, and only OSR procedures with an infrarenal aortic cross-clamping were included in the study. RESULTS In this group of 115 patients (EVAR: 58 patients, 51% and OSR: 57 patients, 49%), EVAR and OSR patients had similar comorbidities, except for obesity (EVAR: 38% vs. OSR: 19%; P = 0.03). A stay in the intensive care unit (ICU) was necessary in 19% of patients with EVAR versus 79% with OSR (P = 0.001), and the amount of blood transfusion was 236 ± 31 mL for EVAR versus 744 ± 98 mL for OSR (P = 0.001). The hospital stay was 4 ± 2 days for EVAR versus 9 ± 6 days for OSR (P = 0.03). The overall 30-day mortality was 1% (EVAR: 0% vs. OSR: 2%; P = 0.30). Five patients (4%) required reinterventions within 30 days (EVAR: 0% vs. OSR: 8%, P = 0.001). The mean follow-up was 86 ± 38 months. Freedom from reintervention at 10 years after EVAR was 81% versus OSR 74%; (P = 0.77). Late reinterventions were reported in 13 patients (23%) with OSR and in 10 patients (17%) with EVAR. Postoperative retrograde ejaculation occurred more often in patients with OSR (31%) versus EVAR (2%) (P = 0.001). During the follow-up, cancer was found in 19 (17%) patients with no difference between EVAR and OSR (P = 0.83). The global survival at 10 years was 72% (EVAR: 79% vs. OSR: 70%; P = 0.94). CONCLUSIONS In this study, EVAR was associated with a shorter hospital stay, less need for the ICU, and less early reinterventions than OSR. Survival and reinterventions during the follow-up were not significantly different between EVAR and OSR. According to these results, EVAR may be considered for patients aged ≤65 years with a favorable anatomy.
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243
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Silingardi R, Sirignano P, Andreoli F, Mansour W, Migliari M, Speziale F. Unibody Endograft Using AFX 2 for Less Invasive and Faster Endovascular Aortic Repair: Protocol for a Multicenter Nonrandomized Study. JMIR Res Protoc 2020; 9:e16959. [PMID: 32250278 PMCID: PMC7171559 DOI: 10.2196/16959] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/20/2020] [Accepted: 01/26/2020] [Indexed: 01/20/2023] Open
Abstract
Background Since the introduction of endovascular aortic repair (EVAR) for treatment of abdominal aortic aneurysms (AAAs), progressive improvements in results have been achieved. However, conventional bifurcated stent grafts have been proven to have a nonnegligible risk of failure and secondary intervention, principally due to the lack of adequate proximal sealing. The unique AFX 2 Endovascular AAA System (Endologix, Irvine, CA) unibody device, which provides different sealing and fixation features compared with conventional devices, seems to overcome these limitations. Objective The aim of this study is to evaluate intraoperative, perioperative, and postoperative results in patients treated with the AFX 2 Endovascular AAA System endografts for elective AAA repair in a large cohort of consecutive patients. Methods All eligible EVAR patients will be included in this observational, multicenter, prospective, nonrandomized study. The number of patients to be enrolled is 500. Results The primary endpoint of the study is to evaluate the technical and clinical success of EVAR with unibody endografts in short- (90-day), mid- (1-year), and long-term (5-year) follow-up periods. The following secondary endpoints will also be addressed: operative time, intraoperative radiation exposure, contrast medium usage, AAA sac shrinkage at 12-month and 5-year follow-up, and any potential role of patients’ baseline characteristics and device configuration on primary endpoint. The actual start date of the investigation was November 2019. The final patient is expected to be treated by the end of December 2020, and the estimated study completion date is December 2025. Conclusions This study will provide verified real-world data on AAAs treated by AFX 2 endografts and followed for a long-term interval. International Registered Report Identifier (IRRID) PRR1-10.2196/16959
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Affiliation(s)
- Roberto Silingardi
- Department of Vascular Surgery, Ospedale Civile Sant'Agostino-Estense, Azienda Ospedaliero-Universitaria di Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Pasqualino Sirignano
- Vascular and Endovascular Surgery Unit, Department of Surgery Paride Stefanini, Sapienza University of Rome, Rome, Italy
| | - Francesco Andreoli
- Department of Vascular Surgery, Ospedale Civile Sant'Agostino-Estense, Azienda Ospedaliero-Universitaria di Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Wassim Mansour
- Vascular and Endovascular Surgery Unit, Department of Surgery Paride Stefanini, Sapienza University of Rome, Rome, Italy
| | - Mattia Migliari
- Department of Vascular Surgery, Ospedale Civile Sant'Agostino-Estense, Azienda Ospedaliero-Universitaria di Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesco Speziale
- Vascular and Endovascular Surgery Unit, Department of Surgery Paride Stefanini, Sapienza University of Rome, Rome, Italy
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- See Acknowledgments section for collaborators/group members
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Lindström I, Protto S, Khan N, Sillanpää N, Hernesniemi J, Oksala N. Developing sarcopenia predicts long-term mortality after elective endovascular aortic aneurysm repair. J Vasc Surg 2020; 71:1169-1178.e5. [DOI: 10.1016/j.jvs.2019.05.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 05/25/2019] [Indexed: 12/25/2022]
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Prognosis review and time-to-event data meta-analysis of endovascular aneurysm repair outside versus within instructions for use of aortic endograft devices. J Vasc Surg 2020; 71:1415-1431.e15. [DOI: 10.1016/j.jvs.2019.08.247] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 08/06/2019] [Indexed: 01/08/2023]
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O'Donnell TFX, Verhagen HJ, Pratesi G, Pratesi C, Teijink JAW, Vermassen FEG, Mwipatayi P, Forbes TL, Schermerhorn ML. Female sex is associated with comparable 5-year outcomes after contemporary endovascular aneurysm repair despite more challenging anatomy. J Vasc Surg 2020; 71:1179-1189. [PMID: 31477480 PMCID: PMC7048667 DOI: 10.1016/j.jvs.2019.05.065] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 05/24/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Women with abdominal aortic aneurysms less often meet anatomic criteria for endovascular repair and experience worse perioperative and long-term survival. METHODS We compared long-term survival, aneurysm-related mortality, and rates of endoleaks and reinterventions between male and female patients in the Endurant Stent Graft Natural Selection Global Postmarket Registry (ENGAGE) using 2:1 propensity score matching. RESULTS There were 1130 male patients and 133 female patients, yielding 399 patients after matching (266 male patients, 133 female patients). Female patients were older, with smaller aneurysms, smaller iliac arteries, and shorter, more angulated necks, and they were more often treated outside the device instructions for use (all P < .001). Through 5 years, female patients experienced overall mortality comparable to that of well-matched male patients (34% vs 38%, respectively; hazard ratio, 0.89 [0.61-1.29]; P = .54) and lower aneurysm-related mortality (0% vs 3%; P = .047). Female patients experienced higher rates of any postoperative type IA endoleak through 5 years (10% vs 1%; P < .001) but comparable rates of secondary endovascular procedures (14% vs 16%; P = .40). Female sex was independently associated with significantly higher risk of long-term type IA endoleaks (hazard ratio, 4.8 [1.2-20.8]; P = .04), even after accounting for anatomic factors. No female patient experienced aneurysm rupture during follow-up, and only one female patient underwent conversion to open repair. CONCLUSIONS Despite more challenging anatomy, female patients in the ENGAGE registry had long-term outcomes comparable to those of male patients. However, female patients experienced higher rates of type IA endoleaks. Although standard endovascular aneurysm repair remains a viable solution for most women, whether high-risk patients may be better served with open surgery, custom-made devices, EndoAnchors (Aptus Endosystems, Sunnyvale, Calif), or chimneys is worthy of further study.
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Affiliation(s)
- Thomas F X O'Donnell
- Division of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, Mass; Department of Surgery, Massachusetts General Hospital, Boston, Mass
| | - Hence J Verhagen
- Division of Vascular and Endovascular Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Giovanni Pratesi
- Vascular Surgery, Department of Biomedicine and Prevention, University of Roma Tor Vergata, Rome, Italy
| | - Carlo Pratesi
- Department of Vascular Surgery, University of Florence, Florence, Italy
| | - Joep A W Teijink
- Department of Vascular Surgery, Catharina Hospital, Eindhoven, The Netherlands; Department of Epidemiology, CAPRHI School for Public Health and Primary Care, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - Frank E G Vermassen
- Department of Vascular Surgery, Universitair Ziekenhuis Gent, Ghent, Belgium
| | - Patrice Mwipatayi
- Department of Vascular Surgery, Royal Perth Hospital, Perth, Western Australia, Australia
| | - Thomas L Forbes
- Division of Vascular Surgery, Peter Munk Cardiac Centre, University Health Network and University of Toronto, Toronto, Ontario, Canada
| | - Marc L Schermerhorn
- Division of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Boston, Mass.
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Scallan O, Novick T, Power AH, DeRose G, Duncan A, Dubois L. Long-term outcomes comparing endovascular and open abdominal aortic aneurysm repair in octogenarians. J Vasc Surg 2020; 71:1162-1168. [DOI: 10.1016/j.jvs.2019.06.207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 06/05/2019] [Indexed: 01/23/2023]
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248
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Delivering the promise of a minimally invasive thoracoabdominal aneurysm repair: The road less travelled. J Vasc Surg 2020; 71:1413-1414. [DOI: 10.1016/j.jvs.2019.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 09/01/2019] [Indexed: 11/19/2022]
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249
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Muzepper M, Zhou M. Anatomic Suitability of Iliac Branched Devices for Chinese Patients with Abdominal-Iliac Aortic Aneurysm. Ann Vasc Surg 2020; 67:178-184. [PMID: 32217136 DOI: 10.1016/j.avsg.2020.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 02/29/2020] [Accepted: 03/04/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Preserving internal iliac flow is the key to preventing ischemic complications during endovascular aneurysm repair (EVAR). The aim of this study is to determine the morphological features of abdominal aortic aneurysms (AAAs) that have been reported in clinical trials in Chinese patients to identify unique features of iliac branched systems. METHODS The data for patients who had common iliac aneurysms suitable for imaging review from 2014 to 2017 at 1 institution in China were reviewed. Three-dimensional workstations were used to measure the centerline diameters and lengths of aortoiliac structures, which were screened for suitability for both Cook iliac branch devices (IBD) and Gore iliac branch endoprosthesis (IBE). RESULTS A total of 102 lesions of common iliac aneurysms were suitable for imaging review. The anatomic standards for the Gore IBE and Cook IBD were met by 13.7% (14/102) and 9.8% (10/102) of the cases, respectively, and 3 cases were suitable for both devices. The most common cause of not meeting the criteria was the same for both the Cook IBD (78.4%) and Gore IBE (48.03%), which was a limitation of the diameter of the target internal iliac artery. Of the 92 lesions excluded from the Cook IBD trial, 11 (11.9%) were eligible for the Gore IBE trial. Likewise, 7.95% (7/88) of the lesions excluded from the Gore IBE trial would have been eligible for the Cook IBD graft. In a practice that is able to enroll patients in both trials, a total of 20.6% (21/102) of the patients would be eligible for treatment, based on the anatomic criteria. CONCLUSIONS The high incidence of iliac artery involvement in AAAs makes EVAR more complicated. Cook IBD and Gore IBE are only suitable for the treatment of a total of 20.6% Chinese patients based on the anatomic criteria. A limitation in the diameter of the target internal iliac artery is the most common cause of failure to meet the criteria for both devices. Future generations of iliac branch technologies should be designed with diameter accommodations for the hypogastric branch stent to reach a wider group of patients with aortoiliac aneurysmal disease.
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Affiliation(s)
- Mehmutjan Muzepper
- Nanjing Drum Tower Hospital, Nanjing University, Nanjing, People's Republic of China
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, People's Republic of China.
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Salata K, Abdallah FW, Hussain MA, de Mestral C, Greco E, Aljabri B, Mamdani M, Mazer CD, Forbes TL, Verma S, Al-Omran M. Short-term outcomes of combined neuraxial and general anaesthesia versus general anaesthesia alone for elective open abdominal aortic aneurysm repair: retrospective population-based cohort study †. Br J Anaesth 2020; 124:544-552. [PMID: 32216957 DOI: 10.1016/j.bja.2020.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 01/05/2020] [Accepted: 01/25/2020] [Indexed: 10/24/2022] Open
Abstract
BACKGROUND Use of neuraxial anaesthesia for open abdominal aortic aneurysm repair is postulated to reduce mortality and morbidity. This study aimed to determine the 90-day outcomes after elective open abdominal aortic aneurysm repair in patients receiving combined general and neuraxial anaesthesia vs general anaesthesia alone. METHODS A retrospective population-based cohort study was conducted from 2003 to 2016. All patients ≥40 yr old undergoing open abdominal aortic aneurysm repair were included. The propensity score was used to construct inverse probability of treatment weighted regression models to assess differences in 90-day outcomes. RESULTS A total of 10 447 elective open abdominal aortic aneurysm repairs were identified; 9003 (86%) patients received combined general and neuraxial anaesthesia and 1444 (14%) received general anaesthesia alone. Combined anaesthesia was associated with significantly lower hazards for all-cause mortality (hazard ratio [HR]=0.47; 95% confidence interval [CI], 0.37-0.61) and major adverse cardiovascular events (HR=0.72; 95% CI, 0.60-0.86). Combined patients were at lower odds for acute kidney injury (odds ratio [OR]=0.66; 95% CI, 0.49-0.89), respiratory failure (OR=0.41; 95% CI, 0.36-0.47), and limb complications (OR=0.30; 95% CI, 0.25-0.37), with higher odds of being discharged home (OR=1.32; 95% CI, 1.15-1.51). Combined anaesthesia was also associated with significant mechanical ventilation and ICU and hospital length of stay benefits. CONCLUSIONS Combined general and neuraxial anaesthesia in elective open abdominal aortic aneurysm repair is associated with reduced 90-day mortality and morbidity. Neuraxial anaesthesia should be considered as a routine adjunct to general anaesthesia for elective open abdominal aortic aneurysm repair.
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Affiliation(s)
- Konrad Salata
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Faraj W Abdallah
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada; Department of Anaesthesia, University of Ottawa, Ottawa, ON, Canada; Department of Anaesthesia, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Mohamad A Hussain
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Charles de Mestral
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Elisa Greco
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Badr Aljabri
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Department of Surgery, King Saud University, Riyadh, Saudi Arabia
| | - Muhammad Mamdani
- Li Ka Shing Centre for Healthcare Analytics Research and Training (CHART), Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada; Department of Medicine, Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Institute of Health Policy, Management and Evaluation, Dalla Lana Faculty of Public Health, University of Toronto, Toronto, ON, Canada; Institute for Clinical Evaluative Sciences at Sunnybrook Hospital, Toronto, ON, Canada
| | - C David Mazer
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada; Department of Anaesthesia, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Thomas L Forbes
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Peter Munk Cardiac Centre, University Health Network and Toronto, University of Toronto, ON, Canada
| | - Subodh Verma
- Division of Cardiac Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Cardiac Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Mohammed Al-Omran
- Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada; Division of Vascular Surgery, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Department of Surgery, King Saud University, Riyadh, Saudi Arabia.
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