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Nwachukwu C, Ratner M, Rockman C, Cayne N, Siracuse JJ, Johnson W, Chang H, Jacobowitz G, Veith F, Shariff S, Garg K. Outcomes and predictors of amputation-free survival in patients undergoing below-knee popliteal-distal bypass. J Vasc Surg 2024; 79:1163-1169.e2. [PMID: 38244642 DOI: 10.1016/j.jvs.2023.12.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/15/2023] [Accepted: 12/17/2023] [Indexed: 01/22/2024]
Abstract
OBJECTIVE The infrageniculate popliteal artery is a potential source for inflow in lower extremity bypass surgery in patients with isolated tibial artery disease. The objective of our study was to assess the short- and long-term outcomes of popliteal-distal bypasses using data from the Vascular Quality Initiative (VQI). METHODS The VQI registry was queried between 2003 and 2021 for patients undergoing surgical revascularizations with the below-knee popliteal artery serving as inflow. Demographics, comorbidities, intraoperative characteristics, and postoperative complications were analyzed. Kaplan-Meier models were used to estimate amputation-free survival, survival, and freedom from amputation. Cox regression analysis was conducted to determine factors associated with major amputation or death. RESULTS A total of 1884 procedures were analyzed. The mean age of the included patients was 67.7 years. The most frequently observed preoperative comorbidities included insulin-dependent diabetes (52.3%), coronary disease (32.4%), and end-stage renal disease (14.4%). Of all the patients, 670 (35.6%) had a history of ipsilateral endovascular intervention. The procedures were performed for a variety of indications, including tissue loss (84.3%), rest pain (10.9%), and claudication (4.8%). Intraoperatively, the outflow targets were the dorsalis pedis (31.4%), the posterior tibial (24.4%), and the anterior tibial arteries (15.6%). Vein conduit was used in 92.1% of cases. The rate of perioperative myocardial infarction (MI) was 2.4%, and the 30-day mortality was 1.9%. The median length of follow up was 371 days. Amputation-free survival was found to be 85.6% (95% confidence interval [CI], 84.0%-87.2%) at 6 months and 78.6% (95% CI, 76.6%-80.4%) at 12 months. Survival was found to be 93.4% (95% CI, 92.2%-94.5%) at 6 months and 88.6% (95% CI, 87.1%-90.0%) at 12 months. Freedom from amputation was found to be 92.0% (95% CI, 90.7%-93.3%) at 6 months and 89.0% (95% CI, 87.3%-90.4%) at 12 months. Cox regression analysis demonstrated that age greater than 65 years, congestive heart failure, coronary artery disease, and end-stage renal disease were associated with a higher risk of major amputation or death (P < .05). CONCLUSIONS Below-knee popliteal-distal bypass is a safe and effective approach to treat severe tibial vessel occlusive disease in this challenging patient cohort. Patients exhibited low perioperative complication rates and good amputation-free survival at 1 year.
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Affiliation(s)
- Chukwuma Nwachukwu
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Molly Ratner
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Caron Rockman
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Neal Cayne
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Jeffrey J Siracuse
- Division of Vascular and Endovascular Surgery, Department of Surgery, Boston Medical Center, Boston, MA
| | - William Johnson
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Heepeel Chang
- Division of Vascular Surgery, Department of Surgery, Westchester Medical Center, Valhalla, NY
| | - Glenn Jacobowitz
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Frank Veith
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Saadat Shariff
- Division of Vascular Surgery, Department of Surgery, Montefiore Medical Center, Bronx, NY
| | - Karan Garg
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
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Rao A, Ratner M, Zhang J, Wiske C, Garg K, Maldonado T, Sadek M, Jacobowitz G, Berland T, Teter K, Rockman C. The Substantial Burden of Iatrogenic Vascular Injury on the Vascular Surgery Workforce at an Academic Medical Center. J Vasc Surg 2024:S0741-5214(24)01000-0. [PMID: 38641255 DOI: 10.1016/j.jvs.2024.04.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/21/2024]
Abstract
OBJECTIVE Vascular surgeons are often called upon to provide emergent surgical assistance to other specialties for iatrogenic complications, both intraoperatively and in the inpatient setting. The management of iatrogenic vascular injury remains a critical role of the vascular surgeon, especially in the context of the increasing adoption of percutaneous procedures by other specialties. This study aims to characterize consultation timing, management, and outcomes for iatrogenic vascular injuries. METHODS This study identified patients for whom vascular surgery was consulted for iatrogenic vascular complications from February 1, 2022 to May 12, 2023. Patient information, including demographic information, injury details, and details of any operative intervention, were retrospectively collected from February 1, 2022 to October 13, 2022 and prospectively collected for the remainder of the study period. Analyses were performed with R version 2022.02.03. RESULTS There were 87 patients with consultations related to iatrogenic vascular injury. Of these, 42 (46%) were female and the mean age was 59 years (± 18 years). The most common consulting services were cardiology (32%), cardiothoracic surgery (26%), general surgery (8%) and neuro-interventional radiology (10%). Reasons for consultation included hemorrhage (36%), limb ischemia (36%), and treatment of pseudoaneurysm (23%). 24% of consults were intraoperative, 20% of consults related to ECMO cannulation, and 16% of consults related to ventricular assist devices including LVAD and IABP. The majority of these consult requests occurred during evening and night hours (5 pm - 7 am) (60%) (Figure 1). Emergent intervention was required in 62% of cases and consisted of: primary open surgical repair of arterial injury (54%), endovascular intervention (21%), and open thromboembolectomy (15%). Overall, in-hospital mortality for the patient cohort was 20% and the reintervention rate was 23%, reflecting the underlying complexity of the illness and nature of the vascular injury in this patient group. CONCLUSIONS Vascular surgeons play an essential role in managing emergent life-threatening hemorrhagic and ischemic iatrogenic vascular complications in the hospitalized setting. The complications require immediate bedside or intraoperative consult and often emergent open surgical or endovascular intervention. Furthermore, many of these require urgent management in the evening or overnight hours, and therefore the high frequency of these events represents a potential significant resource utilization and workforce issue to the vascular surgery workforce.
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Affiliation(s)
- Abhishek Rao
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY.
| | - Molly Ratner
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Jason Zhang
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Clay Wiske
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Thomas Maldonado
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Mikel Sadek
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Glenn Jacobowitz
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Todd Berland
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Katherine Teter
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, NYU School of Medicine, New York, NY
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Ratner M, Hartwell CA, Zhang J, Johnson W, Nwachukwu C, Garg K, Kim D, Rockman C. The natural history of celiac artery aneurysms. Vascular 2024:17085381241245142. [PMID: 38623819 DOI: 10.1177/17085381241245142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
OBJECTIVES The goal of this study was to document the natural history of celiac artery aneurysms (CAAs). BACKGROUND Celiac artery aneurysms are rare. Existing literature is skewed towards outcomes after intervention of large, symptomatic aneurysms but the behavior of untreated CAAs is poorly understood. METHODS This is a single institution, retrospective analysis of patients with CAA diagnosed by CT imaging (2015-2019) identified through an institutional radiology database. Radiologic, demographic, and follow-up data were analyzed. The primary endpoint was the mean growth rate of CAAs. RESULTS Of the 76 patients included, 86.8% were men with a mean age at presentation of 69.8 years. The mean CAA diameter on index imaging was 15.4 +/- 3.8 mm (range, 7-30 mm). All were classified as true aneurysms and 76.3% were saccular. All patients had clinical follow-up with mean follow-up 31.2 months +/- 21.6 months. No patient developed symptoms or rupture. The mean radiological follow-up among 45 patients was 25.2 +/- 16.8 months. Over this period, 16 CAAs (35.6%) enlarged, while 29 (64.4%) remained stable. One patient (1.3%) underwent intervention for increasing size in the setting of a chronic dissection. On multivariate analysis, age <70 was significantly associated with increased risk of aneurysm growth. CONCLUSIONS In this institutional review of patients with CAAs, the majority of aneurysms remained stable in size, with no patients developing symptoms or rupture over clinical follow-up. Given the observed benign behavior of these aneurysms, guidelines that suggest conservative management of CAAs less than 2 cm seems appropriate.
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Affiliation(s)
- Molly Ratner
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - C Austen Hartwell
- Department of Radiology, New York University Langone Medical Center, New York, NY, USA
| | - Jason Zhang
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - William Johnson
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Chukwuma Nwachukwu
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Danny Kim
- Department of Radiology, New York University Langone Medical Center, New York, NY, USA
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
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Zhang J, Ratner M, Harish KB, Speranza G, Hartwell CA, Rao A, Garg K, Maldonado T, Sadek M, Jacobowitz G, Rockman C. The natural history and long-term follow-up of splenic artery aneurysms. J Vasc Surg 2024; 79:801-807.e3. [PMID: 38081394 DOI: 10.1016/j.jvs.2023.11.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/09/2023] [Accepted: 11/10/2023] [Indexed: 01/09/2024]
Abstract
OBJECTIVE Although splenic artery aneurysms (SAAs) are the most common visceral aneurysm, there is a paucity of literature on the behavior of these entities. The objective of this study was to review the natural history of patients with SAA. METHODS This single-institution, retrospective analysis studied patients with SAA diagnosed by computed tomography imaging between 2015 and 2019, identified by our institutional radiology database. Imaging, demographic, and clinical data were obtained via the electronic medical record. The growth rate was calculated for patients with radiologic follow-up. RESULTS The cohort consisted of 853 patients with 890 SAAs, of whom 692 were female (81.2%). There were 37 women (5.3%) of childbearing age (15-50 years). The mean age at diagnosis was 70.9 years (range: 28-100 years). Frequently observed medical comorbidities included hypertension (70.2%), hypercholesterolemia (54.7%), and prior smoking (32.2%). Imaging indications included abdominal pain (37.3%), unrelated follow-up (28.0%), and follow-up of a previously noted visceral artery aneurysm (8.6%). The mean diameter at diagnosis was 13.3 ± 6.3 mm. Anatomic locations included the splenic hilum (36.0%), distal splenic artery (30.3%), midsplenic artery (23.9%), and proximal splenic artery (9.7%). Radiographically, the majority were saccular aneurysms (72.4%) with calcifications (88.5%). One patient (38-year-old woman) was initially diagnosed at the time of rupture of a 25 mm aneurysm; this patient underwent immediate endovascular intervention with no complications. The mean clinical follow-up among 812 patients was 4.1 ± 4.0 years, and the mean radiological follow-up among 514 patients was 3.8 ± 6.8 years. Of the latter, 122 patients (23.7%) experienced growth. Aneurysm growth rates for initial sizes <10 mm (n = 123), 10 to 19 mm (n = 353), 20 to 29 mm (n = 34), and >30 mm (n = 4) were 0.166 mm/y, 0.172 mm/y, 0.383 mm/y, and 0.246 mm/y, respectively. Of the entire cohort, 27 patients (3.2%) eventually underwent intervention (81.5% endovascular), with the most common indications including size/growth criteria (70.4%) and symptom development (18.5%). On multivariate analysis, only prior tobacco use was significantly associated with aneurysm growth (P = .028). CONCLUSIONS The majority of SAAs in this cohort remained stable in size, with few patients requiring intervention over a mean follow-up of 4 years. Current guidelines recommending treatment of asymptomatic aneurysms >30 mm appear appropriate given their slow progression. Despite societal recommendations for intervention for all SAAs among women of childbearing age, only a minority underwent vascular surgical consultation and intervention in this series, indicating that these recommendations are likely not well known in the general medical community.
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Affiliation(s)
- Jason Zhang
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Molly Ratner
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Keerthi B Harish
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Giancarlo Speranza
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - C Austen Hartwell
- Department of Radiology, New York University Langone Medical Center, New York, NY
| | - Abhishek Rao
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Thomas Maldonado
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Mikel Sadek
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Glenn Jacobowitz
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
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Auda ME, Ratner M, Pezold M, Rockman C, Sadek M, Jacobowitz G, Berland T, Siracuse JJ, Teter K, Johnson W, Garg K. Short-term outcomes of endovascular management of acute limb ischemia using aspiration mechanical thrombectomy. Vascular 2024:17085381241236923. [PMID: 38415647 DOI: 10.1177/17085381241236923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
OBJECTIVE Management of acute limb ischemia (ALI) has seen greater utilization of catheter-based interventions over the last two decades. Data on their efficacy is largely based on comparisons of catheter-directed thrombolysis (CDT) and open thrombectomy. During this time, many adjuncts to CDT have emerged with different mechanisms of action, including pharmacomechanical thrombolysis (PMT) and aspiration mechanical thrombectomy (AMT). However, the safety and efficacy of newer adjuncts like AMT have not been well established. This study is a retrospective analysis of the contemporary management of ALI comparing patients treated with aspiration mechanical thrombectomy to patients treated with the more established CDT adjunct, pharmacomechanical thrombolysis. METHODS Patients undergoing peripheral endovascular intervention for ALI using an adjunctive device were identified through query of the Vascular Quality Initiative (VQI) Peripheral Vascular Intervention (PVI) module from 2014 to 2019. Patients with a nonviable extremity (Rutherford ALI Stage 3), prior history of ipsilateral major amputation, popliteal aneurysm, procedures that were deemed elective (>72 h from admission), procedures that did not utilize an endovascular adjunctive device, and patients without short-term follow-up were all excluded from analysis. The primary outcome was a composite outcome of freedom from major amputation and/or death in the perioperative time period. RESULTS We identified 528 patients with Rutherford ALI Stage 1 or 2 who were treated with an endovascular adjunct. 433 patients did not undergo aspiration mechanical thrombectomy (no AMT group) and 95 patients did undergo aspiration mechanical thrombectomy (AMT group). The amputation-free survival across all patients was 93.4%. There were significant differences in demographic, comorbidity, and treatment variables between groups (e.g., gender, prior percutaneous coronary intervention (PCI), history of prior peripheral artery disease intervention, and history of prior infra-inguinal PVI), so a propensity score matched analysis was included to account for these group differences. In the propensity score matched analysis, there was no significant difference in major amputation (AMT 7.4% vs no AMT 3.2%, p = 0.13) or death (AMT 95.8% survival vs no AMT 98.4% survival, p = 0.23) with the use of aspiration mechanical thrombectomy. However, there was significantly worse amputation-free survival with the use of aspiration mechanical thrombectomy (AMT 88.4% vs no AMT 95.3%, p = 0.03). On multivariate analysis, prior supra-inguinal bypass (OR 4.85, 1.70-13.84, p = 0.003), Rutherford ALI Stage 2B (OR 3.13, 1.47-6.67, p = 0.003), and aspiration mechanical thrombectomy (OR 2.71, 1.03-7.17, p = 0.05) were associated with the composite outcome. CONCLUSIONS Short-term amputation-free survival rates of endovascular management of acute limb ischemia are adequate across all modalities. However, aspiration mechanical thrombectomy was associated with significantly worse amputation-free survival compared to other endovascular adjuncts alone (i.e., pharmacomechanical thrombolysis). Severe limb ischemia (Rutherford ALI Stage 2B) and prior supra-inguinal bypass were associated with worse amputation-free survival regardless of the choice of endovascular intervention.
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Affiliation(s)
- Matthew E Auda
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Molly Ratner
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Michael Pezold
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Mikel Sadek
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Glenn Jacobowitz
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Todd Berland
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Jeffrey J Siracuse
- Division of Vascular and Endovascular Surgery, Boston Medical Center, Boston University Chobanian and Avedisian School of Medicine, Boston, MA, USA
| | - Katherine Teter
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - William Johnson
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, USA
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Ratner M, Rockman C, Chandra P, Cayne N, Jacobowitz G, Lamparello PJ, Maldonado T, Sadek M, Berland T, Garg K. The Effect of Ipsilateral Carotid Revascularization on Contralateral Carotid Duplex Parameters in Patients with Bilateral Carotid Stenosis. Ann Vasc Surg 2024; 99:414-421. [PMID: 37918660 DOI: 10.1016/j.avsg.2023.09.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/30/2023] [Accepted: 09/12/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND Duplex-derived velocity measurements are often used to determine the need for carotid revascularization. There is evidence that severe ipsilateral carotid stenosis can cause artificially elevated velocities in the contralateral carotid artery, which may decrease following ipsilateral revascularization. The objective of this study was to determine if contralateral carotid artery duplex velocities decrease following ipsilateral carotid endarterectomy or stenting procedures. METHODS This is a single institutional retrospective study of prospectively collected data on all patients who underwent carotid revascularization from 2013 to 2021. Patients with immediate preoperative and first postoperative Duplex scan within 4 months of carotid revascularization at our vascular laboratory were included for analysis. Patients with contralateral occlusion were excluded. Duplex criteria used to define moderate (50-69%) and severe (>70%) stenosis were systolic velocity ≥125 cm/sec and ≥230 cm/sec, respectively. RESULTS Between 2013 and 2021, 129 patients with bilateral carotid stenosis underwent either carotid endarterectomy (98) or a stenting procedure (31). The majority of patients (90%) underwent intervention for severe stenosis. Preoperatively, the contralateral artery was categorized as severe in 30.4% patients. After ipsilateral carotid revascularization, 86 patients (67.2%) saw a decrease in the contralateral artery peak systolic velocity (PSV), while the remaining remained stable or increased. Fifty-four patients had a change in designated stenosis severity in the contralateral artery. Between the carotid endarterectomy and stenting cohorts, there was no significant difference in the proportion of patients whose contralateral velocity decreased (69.4% vs. 61.3%, P = 0.402). Patients with coronary artery disease and diabetes were significantly less likely to experience a decrease in the contralateral artery PSV after ipsilateral intervention (P = 0.018 and P = 0.033). CONCLUSIONS In patients with bilateral carotid disease, ipsilateral revascularization can change the contralateral artery velocity and perceived disease severity. Most patients were noted to have a decrease in the contralateral artery PSV, although almost one-third either stayed stable or increased. On multivariable analysis, patients with coronary artery disease and diabetes were less likely to see a decrease in the contralateral artery PSV after intervention. Patients who are at risk for artificial elevation of the contralateral artery may warrant a re-evaluation of the contralateral artery after ipsilateral intervention. These patients are potentially better assessed with axial imaging, although further research is needed.
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Affiliation(s)
- Molly Ratner
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Pratik Chandra
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Neal Cayne
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Glenn Jacobowitz
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Patrick J Lamparello
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Thomas Maldonado
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Mikel Sadek
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Todd Berland
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, New York.
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Ratner M, Wiske C, Rockman C, Patel V, Siracuse JJ, Cayne N, Garg K. Insulin Dependence is Associated with Poor Long-Term Outcomes Following AAA Repair. Ann Vasc Surg 2023; 97:174-183. [PMID: 37586561 DOI: 10.1016/j.avsg.2023.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/01/2023] [Accepted: 08/01/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND While prior studies have confirmed the protective effect of diabetes on abdominal aortic aneurysm (AAA) development, much less is known about the effect of diabetes, and in particular insulin dependence, on outcomes following AAA repair. In this study, we aim to evaluate the role of insulin-dependent diabetes on short-term and long-term outcomes following open and endovascular AAA repair. METHODS The Vascular Implant Surveillance and Interventional Outcomes Network (VISION), a registry linking the Vascular Quality Initiative (VQI) data with Medicare claims, was queried for patients who underwent open or endovascular AAA repair from 2011 to the present. Exclusion criteria were unknown diabetes status, prior aortic intervention, maximum aneurysm diameter <45 mm at presentation, and Medicare Advantage coverage due to inconsistent follow-up. Patients were stratified based on diabetes status (no diabetes versus diabetes) and insulin dependence (no diabetes or non-insulin-dependent diabetes versus insulin-dependent diabetes). RESULTS Of the 38,437 cases in the VISION endovascular aortic aneurysm (EVAR) and open aortic aneurysm repair (OAR) databases, 21,943 met inclusion criteria. Perioperative outcomes after OAR were comparable between diabetic and nondiabetic patients. However, diabetic patients undergoing EVAR were significantly more likely to have a postoperative myocardial infarction (1.0% vs 0.6%, P = 0.04) and have a 30-day readmission (10.9% vs 8.8%, P < 0.001). Insulin-dependent diabetic patients were more likely to require a 30-day readmission after OAR (24.5% vs 13.5%, P = 0.02) and EVAR (15.1% vs 9.0%, P < 0.001); however, only insulin-dependent diabetes mellitus (IDDM) patients undergoing EVAR experienced higher rates of postoperative myocardial infarction (1.9% vs 0.7%, P < 0.01). After propensity score matching, patients with IDDM undergoing EVAR were additionally at increased risk of mortality at 1-year, 3-year, and 5-year follow-up with the highest risk occurring at the 1-year mark (hazard ratio 1.79, P < 0.0001), while IDDM patients undergoing OAR were only at a significantly increased risk of mortality at 5-year follow-up (hazard ratio 1.90, P = 0.01). CONCLUSIONS Patients with insulin-dependent diabetes have greater than 14% one-year mortality following open or endovascular aneurysm repair, compared to 8% for all others. Our findings raise questions about whether insulin-dependent diabetics should have a higher size threshold for prophylactic repair, although further studies are needed to address this question and consider the influence of glycemic control on these outcomes.
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Affiliation(s)
- Molly Ratner
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Clay Wiske
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Caron Rockman
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Virendra Patel
- Division of Cardiac, Thoracic and Vascular Surgery, Department of Surgery, New York Presbyterian/Columbia University Irving Medical Center, New York, NY
| | - Jeffrey J Siracuse
- Division of Vascular and Endovascular Surgery, Department of Surgery, Boston Medical Center, Boston, MA
| | - Neal Cayne
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Karan Garg
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
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Ratner M, Chang H, Rockman C, Jacobowitz G, Cayne N, Patel V, Jung A, Ramkhelawon B, Siracuse JJ, Garg K. Depressed Ejection Fraction Does Not Affect Perioperative Mortality After Thoracic Endovascular Aortic Repair for Type B Aortic Dissection. Ann Vasc Surg 2023; 96:81-88. [PMID: 37253406 DOI: 10.1016/j.avsg.2023.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/02/2023] [Accepted: 05/07/2023] [Indexed: 06/01/2023]
Abstract
BACKGROUND Despite the expanded application of thoracic endovascular aortic repair (TEVAR) in patients with significant cardiac comorbidities, the effect of decreased left ventricular ejection fraction (EF) on outcomes remains unknown. The aim of this study was to compare outcomes in patients with normal and abnormal EFs undergoing TEVAR for type-B aortic dissection (TBAD). METHODS The Vascular Quality Initiative database was reviewed from 2012 to 2020. Patients were categorized into severely reduced (EF ≤ 30%), reduced (EF 30-50%) and normal EF (EF>50%). Baseline characteristics, procedural details and 18-month outcomes were compared. Multivariable logistic regression identified factors associated with mortality, major adverse cardiac events (MACEs), and aortic-related reintervention. RESULTS Of 1,993 patients, 38 (2%) and 208 (10%) patients had severely reduced ejection fraction (SREF) and reduced ejection fraction (REF). Patients with abnormal EF were more likely to have cardiac comorbidities and be prescribed angiotensin-converting enzyme inhibitors and anticoagulants. Perioperatively, patients with SREF were more likely to experience mortality (13.2% vs. 6.7% vs. 4.4%, P = 0.018), MACE (26.3% vs. 11.5% vs. 8%, P < 0.001), hemodialysis (13.5% vs. 5% vs. 2.9%, P = 0.001) and aortic related reintervention (21.1% vs. 13% vs. 10%, P = 0.041), compared to REF and normal ejection fraction (NEF) patients. However, these associations were not present on multivariable analysis. At 18 months, mortality was significantly higher in patients with SREF, which was confirmed on multivariable analysis, but depressed EF was not associated with increased aortic reintervention compared to NEF. CONCLUSIONS SREF was not independently associated with perioperative mortality or MACE compared to NEF. REF had similar risk of morbidity and mortality compared to NEF in both the perioperative and early postoperative periods. TEVAR-related complications were similar among the cohorts. As such, TEVAR may be offered to appropriately selected patients regardless of EF.
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Affiliation(s)
- Molly Ratner
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
| | - Heepeel Chang
- Division of Vascular Surgery, Department of Surgery, Westchester Medical Center, Valhalla, NY
| | - Caron Rockman
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Glenn Jacobowitz
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Neal Cayne
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Virendra Patel
- Division of Cardiac, Thoracic and Vascular Surgery, Department of Surgery, New York Presbyterian/Columbia University Irving Medical Center, New York, NY
| | - Albert Jung
- Division of Cardiology, Department of Medicine, New York University Langone Medical Center, New York, NY
| | - Bhama Ramkhelawon
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Jeffrey J Siracuse
- Division of Vascular and Endovascular Surgery, Department of Surgery, Boston Medical Center, Boston, MA
| | - Karan Garg
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
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Ghneim M, Kufera J, Zhang A, Penaloza-Villalobos L, Swentek L, Watras J, Smith A, Hahn A, Rodriguez Mederos D, Dickhudt TJ, Laverick P, Cunningham K, Norwood S, Fernandez L, Jacobson LE, Williams JM, Lottenberg L, Azar F, Shillinglaw W, Slivinski A, Nahmias J, Donnelly M, Bala M, Egodage T, Zhu C, Udekwu PO, Norton H, Dunn JA, Baer R, McBride K, Santos AP, Shrestha K, Metzner CJ, Murphy JM, Schroeppel TJ, Stillman Z, O'Connor R, Johnson D, Berry C, Ratner M, Reynolds JK, Humphrey M, Scott M, Hickman ZL, Twelker K, Legister C, Glass NE, Siebenburgen C, Palmer B, Semon GR, Lieser M, McDonald H, Bugaev N, LeClair MJ, Stein D. Does lower extremity fracture fixation technique influence neurologic outcomes in patients with traumatic brain injury? The EAST Brain vs. Bone multicenter trial. J Trauma Acute Care Surg 2023; 95:516-523. [PMID: 37335182 DOI: 10.1097/ta.0000000000004095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
OBJECTIVE This study aimed to determine whether lower extremity fracture fixation technique and timing (≤24 vs. >24 hours) impact neurologic outcomes in TBI patients. METHODS A prospective observational study was conducted across 30 trauma centers. Inclusion criteria were age 18 years and older, head Abbreviated Injury Scale (AIS) score of >2, and a diaphyseal femur or tibia fracture requiring external fixation (Ex-Fix), intramedullary nailing (IMN), or open reduction and internal fixation (ORIF). The analysis was conducted using analysis of variamce, Kruskal-Wallis, and multivariable regression models. Neurologic outcomes were measured by discharge Ranchos Los Amigos Revised Scale (RLAS-R). RESULTS Of the 520 patients enrolled, 358 underwent Ex-Fix, IMN, or ORIF as definitive management. Head AIS was similar among cohorts. The Ex-Fix group experienced more severe lower extremity injuries (AIS score, 4-5) compared with the IMN group (16% vs. 3%, p = 0.01) but not the ORIF group (16% vs. 6%, p = 0.1). Time to operative intervention varied between the cohorts with the longest time to intervention for the IMN group (median hours: Ex-Fix, 15 [8-24] vs. ORIF, 26 [12-85] vs. IMN, 31 [12-70]; p < 0.001). The discharge RLAS-R score distribution was similar across the groups. After adjusting for confounders, neither method nor timing of lower extremity fixation influenced the discharge RLAS-R. Instead, increasing age and head AIS score were associated with a lower discharge RLAS-R score (odds ratio [OR], 1.02; 95% confidence interval [CI], 1.002-1.03 and OR, 2.37; 95% CI, 1.75-3.22), and a higher Glasgow Coma Scale motor score on admission (OR, 0.84; 95% CI, 0.73-0.97) was associated with higher RLAS-R score at discharge. CONCLUSION Neurologic outcomes in TBI are impacted by severity of the head injury and not the fracture fixation technique or timing. Therefore, the strategy of definitive fixation of lower extremity fractures should be dictated by patient physiology and the anatomy of the injured extremity and not by the concern for worsening neurologic outcomes in TBI patients. LEVEL OF EVIDENCE Prognostic and Epidemiological; Level III.
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Affiliation(s)
- Mira Ghneim
- From the R Adams Cowley Shock Trauma Center (M.G., D.S.), Program in Trauma, Department of Surgery, University of Maryland School of Medicine; National Study Center for Trauma and Emergency Medical Systems, Program in Trauma, Center for Shock, Trauma and Anesthesiology Research (J.K.), University of Maryland School of Medicine; University of Maryland School of Medicine (A.Z.); Department of Surgery (L.P.-V., L.S.), Loma Linda University Medical Center; Inova Fairfax Hospital (J.W.); LSUHCS (A.S.); Ochsner Medical Center (A.H.); Broward Health Medical Center (D.R.M., T.J.D.); Atrium Health Carolinas Medical Center (P.L., K.C.); University of Texas Health Science Center (S.N., L.F.); Ascension St. Vincent Hospital (L.E.J., J.M.W.); St. Mary's Medical Center (L.L., F.A.), Florida Atlantic University, Schmidt College of Medicine; Mission Hospital (W.S., A.S.); University of California, Irvine (J.N., M.D.); Hadassah Medical Center and Faculty of Medicine (M.B.), Hebrew University of Jerusalem; Cooper University Health Care (T.E.); Cooper University Health Care (C.Z.); WakeMed Health and Hospitals (P.O.U., H.N.); Medical Center of the Rockies (J.A.D.), University of Colorado Health North; Orthopedic Center of the Rockies (R.B.); Memorial University Medical Center (K.M.); Texas Tech University Health Sciences Center (A.P.S., K.S.); Spartanburg Regional Medical Center (C.J.M., J.M.M.); Memorial Hospital Central (T.J.S., Z.S.); Yale School of Medicine (R.O., D.J.); NYU Grossman School of Medicine (C.B., M.R.,); University of Kentucky (J.K.R., M.H.); St. Mary's Medical Center (M.S.), Essentia Health; NYC Health + Hospitals/Elmhurst (Z.L.H., K.T.), Icahn School of Medicine at Mount Sinai; Rutgers New Jersey Medical School (C.L., N.E.G.); Kettering Health Main Campus (C.S., B.P.); Wright State University Boonshoft School of Medicine (G.R.S.); Research Medical Center (M.L., H.M.); Tufts Medical Center (N.B.), Tuft University School of Medicine; and Tufts Medical Center (M.J.L.)
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Ratner M, Rockman C, Chang H, Johnson W, Sadek M, Maldonado T, Cayne N, Jacobowitz G, Siracuse JJ, Garg K. Young patients undergoing carotid stenting procedures have an increased rate of procedural failure at 1-year follow-up. J Vasc Surg 2023; 78:695-701.e2. [PMID: 37211144 DOI: 10.1016/j.jvs.2023.05.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/09/2023] [Accepted: 05/13/2023] [Indexed: 05/23/2023]
Abstract
OBJECTIVE The outcomes of patients with premature cerebrovascular disease (age ≤55 years) who undergo carotid artery stenting are not well-defined. Our study objective was to analyze the outcomes of younger patients undergoing carotid stenting. METHODS The Society for Vascular Surgery Vascular Quality Initiative was queried for transfemoral carotid artery stenting (TF-CAS) and transcarotid artery revascularization (TCAR) procedures between 2016 and 2020. Patients were stratified based on age ≤55 or >55 years. Primary endpoints were periprocedural stroke, death, myocardial infarction (MI), and composite outcomes. Secondary endpoints included procedural failure (defined as ipsilateral restenosis ≥80% or occlusion) and reintervention rates. RESULTS Of the 35,802 patients who underwent either TF-CAS or TCAR, 2912 (6.1%) were ≤55 years. Younger patients were less likely than older patients to have coronary disease (30.5% vs 50.2%; P < .001), diabetes (31.5% vs 37.9%; P < .001), and hypertension (71.8% vs 89.8%; P < .001), but were more likely to be female (45% vs 35.4%; P < .001) and active smokers (50.9% vs 24.0%; P < .001) Younger patients were also more likely to have had a prior transient ischemic attack or stroke than older patients (70.7% vs 56.9%; P < .001). TF-CAS was more frequently performed in younger patients (79.7% vs 55.4%; P < .001). In the periprocedural period, younger patients were less likely to have a MI than older patients (0.3% vs 0.7%; P < .001), but there was no significant difference in the rates of periprocedural stroke (1.5% vs 2.0%; P = .173) and composite outcomes of stroke/death (2.6% vs 2.7%; P = .686) and stroke/death/MI (2.9% vs 3.2%; P = .353) between our two cohorts. The mean follow-up was 12 months regardless of age. During follow-up, younger patients were significantly more likely to experience significant (≥80%) restenosis or occlusion (4.7% vs 2.3%; P = .001) and to undergo reintervention (3.3% vs 1.7%; P < .001). However, there was no statistical difference in the frequency of late strokes between younger and older patients (3.8% vs 3.2%; P = .129). CONCLUSIONS Patients with premature cerebrovascular disease undergoing carotid artery stenting are more likely to be African American, female, and active smokers than their older counterparts. Young patients are also more likely to present symptomatically. Although periprocedural outcomes are similar, younger patients have higher rates of procedural failure (significant restenosis or occlusion) and reintervention at 1-year follow-up. However, the clinical implication of late procedural failure is unknown, given that we found no significant difference in the rate of stroke at follow-up. Until further longitudinal studies are completed, clinicians should carefully consider the indications for carotid stenting in patients with premature cerebrovascular disease, and those who do undergo stenting may require close follow-up.
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Affiliation(s)
- Molly Ratner
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Caron Rockman
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Heepeel Chang
- Division of Vascular Surgery, Department of Surgery, Westchester Medical Center, Valhalla, NY
| | - William Johnson
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Mikel Sadek
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Thomas Maldonado
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Neal Cayne
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Glenn Jacobowitz
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY
| | - Jeffrey J Siracuse
- Division of Vascular and Endovascular Surgery, Department of Surgery, Boston Medical Center, Boston, MA
| | - Karan Garg
- Division of Vascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY.
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Ratner M, Muqri F, Garg K. Intravascular lithotripsy for the treatment of inferior mesenteric artery in-stent restenosis. J Vasc Surg Cases Innov Tech 2023; 9:101254. [PMID: 37539441 PMCID: PMC10393793 DOI: 10.1016/j.jvscit.2023.101254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 05/30/2023] [Indexed: 08/05/2023] Open
Abstract
Endovascular revascularization with intraluminal stenting is the recommended first-line therapy for chronic mesenteric ischemia. However, early recurrence and in-stent thrombosis remain significant challenges. We present the case of a patient with recurrent chronic mesenteric ischemia secondary to in-stent restenosis that was successfully treated with intravascular lithotripsy, a novel, safe approach to stent salvage.
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Affiliation(s)
| | | | - Karan Garg
- Correspondence: Karan Garg, MD, Division of Vascular Surgery, Department of Surgery, New York University Langone Hospital, 550 First Ave 11th Floor, New York, NY 10016
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Ratner M, Garg K, Chang H, Johnson W, Sadek M, Maldonado T, Cayne N, Siracuse J, Jacobowitz G, Rockman C. Young patients undergoing carotid endarterectomy have increased rates of recurrent disease and late neurological events. J Vasc Surg 2023; 78:123-130. [PMID: 36870458 DOI: 10.1016/j.jvs.2023.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/19/2023] [Accepted: 02/21/2023] [Indexed: 03/06/2023]
Abstract
OBJECTIVES There are few data regarding outcomes of patients with premature cerebrovascular disease (age ≤55 years) who undergo carotid endarterectomy (CEA). The objective of this study was to analyze the demographics, presentation, perioperative and later outcomes of younger patients undergoing CEA. METHODS The Society for Vascular Surgery Vascular Quality Initiative was queried for CEA cases between 2012 and 2022. Patients were stratified based on age of less than 55 or age greater than 55 years. Primary end points were periprocedural stroke, death, myocardial infarction, and composite outcomes. Secondary end points included restenosis (≥80%) or occlusion, late neurological events and reintervention. RESULTS Of 120,549 patients undergoing CEA, 7009 (5.5%) were 55 years old or younger (mean age, 51.3 years). Younger patients were more likely to be African American (7.7% vs 4.5%; P < .001), female (45.2% vs 38.9%; P < .001), and active smokers (57.3% vs 24.1%; P < .001). They were less likely than older patients to have hypertension (82.5% vs 89.7%; P < .001), coronary artery disease (25.0% vs 27.3%; P < .001), and congestive heart failure (7.8% vs 11.4%; P < .001). Younger patients were significantly less likely than older patients to be on aspirin, anticoagulation, statins, or beta-blockers, but were more likely to be taking P2Y12 inhibitors (37.2 vs 33.7%; P < .001). Younger patients were more likely to present with symptomatic disease (35.1% vs 27.6%; P < .001) and were more likely to undergo nonelective CEA (19.2% vs 12.8%; P < .001). Younger and older patients had similar rates of perioperative stroke/death (2% vs 2%; P = NS) and postoperative neurological events (1.9% vs 1.8%; P = NS). However, younger patients had lower rates of overall postoperative complications compared with their older counterparts (3.7% vs 4.7%; P < .001). Of these patients, 72.6% had recorded follow-up (mean, 13 months). During follow-up, younger patients were significantly more likely than older patients to experience a late failure, defined as significant restenosis (≥80%) or complete occlusion of the operated artery (2.4% vs 1.5%; P < .001) and were more likely to experience any neurological event (3.1% vs 2.3%; P < .001). Reintervention rates did not significantly differ between the two cohorts. After controlling for covariates using a logistic regression model, age 55 years or younger was independently associated with increased odds of late restenosis or occlusion (odds ratio, 1.591; 95% confidence interval, 1.221-2.073; P < .001) as well as late neurological events (odds ratio, 1.304; 95% confidence interval, 1.079-1.576; P = .006). CONCLUSIONS Young patients undergoing CEA are more likely to be African American, female, and active smokers. They are more likely to present symptomatically and undergo nonelective CEA. Although perioperative outcomes are similar, younger patients are more likely to experience carotid occlusion or restenosis as well as subsequent neurological events, during a relatively short follow-up period. These data suggest that younger CEA patients may require more diligent follow-up, as well as a continued aggressive approach to medical management of atherosclerosis to prevent future events related to the operated artery, given the particularly aggressive nature of premature atherosclerosis.
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Affiliation(s)
- Molly Ratner
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Karan Garg
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Heepeel Chang
- Westchester Medical Center, Department of Surgery, Division of Vascular Surgery, Valhalla, NY
| | - William Johnson
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Mikel Sadek
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Thomas Maldonado
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Neal Cayne
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Jeffrey Siracuse
- Boston Medical Center, Department of Surgery, Division of Vascular and Endovascular Surgery, Boston, MA
| | - Glenn Jacobowitz
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY
| | - Caron Rockman
- New York University Langone Medical Center, Department of Surgery, Division of Vascular Surgery, New York, NY.
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Schlacter JA, Ratner M, Siracuse J, Patel V, Johnson W, Torres J, Chang H, Jacobowitz G, Rockman C, Garg K. Urgent Endarterectomy for Symptomatic Carotid Occlusion is Associated with a High Mortality. J Vasc Surg 2023:S0741-5214(23)01033-9. [PMID: 37076104 DOI: 10.1016/j.jvs.2023.02.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/20/2023] [Accepted: 02/23/2023] [Indexed: 04/21/2023]
Abstract
OBJECTIVE Interventions for carotid occlusions are infrequently undertaken and the outcomes are poorly defined. We sought to study patients undergoing urgent carotid revascularization for symptomatic occlusions. METHODS The Society for Vascular Surgery Vascular Quality Initiative database was queried from 2003 to 2020 to identify patients with carotid occlusions undergoing carotid endarterectomy (CEA). Only symptomatic patients undergoing urgent interventions within 24 hours of presentation were included. Patients were identified based on CT and MRI imaging. This cohort was compared to symptomatic patients undergoing urgent intervention for severe stenosis (≥80%). Primary endpoints were perioperative stroke, death, myocardial infarction (MI) and composite outcomes as defined by the SVS reporting guidelines. Patient characteristics were analyzed to determine predictors of perioperative mortality and neurological events. RESULTS 390 patients who underwent urgent CEA for symptomatic occlusions were identified. The mean age was 67.4±10.2 years (range 39 to 90 years). The cohort was predominantly male (60%) with associated risk factors for cerebrovascular disease, including hypertension (87.4%), diabetes (34.4%), coronary artery disease (21.6%) and current smoking (38.7%). This population had high utilization of medications including statin (78.6%), P2Y12 inhibitor (32.0%), aspirin (77.9%) and renin-angiotensin inhibitor (43.7%) preoperatively. When compared to patients undergoing urgent endarterectomy for severe stenosis (≥80%), those with symptomatic occlusion were well matched with regards to risk factors, but the severe stenosis cohort appeared better medically managed and less likely to present with cortical stroke symptoms. Perioperative outcomes were significantly worse for the carotid occlusion cohort, primarily driven by higher perioperative mortality (2.8% vs 0.9%, P<.001). The composite endpoint of stroke/death/MI was also significantly worse in the occlusion cohort (7.7% vs 4.9%, P=.014). On multivariate analysis, carotid occlusion was associated with increased mortality (OR, 3.028; 95% CI, 1.362-6.730; P=.007) and composite outcome of stroke, death, or MI (OR, 1.790; 95% CI, 1.135-2.822, P=.012). CONCLUSIONS Revascularization for symptomatic carotid occlusion constitutes approximately 2% of carotid interventions captured in the VQI, affirming the rarity of this undertaking. These patients have acceptable rates of perioperative neurologic events but are at an elevated risk of overall perioperative adverse events, primarily driven by higher mortality, compared to those with severe stenosis. Carotid occlusion appears to be the most significant risk factor for the composite endpoint of perioperative stroke, death, or MI. While intervention for a symptomatic carotid occlusion may be performed with acceptable rate of perioperative complications, judicious patient selection is warranted in this high-risk cohort.
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Affiliation(s)
| | - Molly Ratner
- Division of Vascular and Endovascular Surgery, New York University Langone Health, New York, NY
| | - Jeffrey Siracuse
- Division of Vascular and Endovascular Surgery, Boston University, Boston, MA
| | - Virendra Patel
- Division of Vascular and Endovascular Surgery, Columbia University, New York, NY
| | - William Johnson
- Division of Vascular and Endovascular Surgery, New York University Langone Health, New York, NY
| | - Jose Torres
- Department of Neurology, New York University Langone Health, New York, NY
| | - Heepeel Chang
- Division of Vascular and Endovascular Surgery, Westchester Medical Center, Valhalla, NY
| | - Glenn Jacobowitz
- Division of Vascular and Endovascular Surgery, New York University Langone Health, New York, NY
| | - Caron Rockman
- Division of Vascular and Endovascular Surgery, New York University Langone Health, New York, NY
| | - Karan Garg
- Division of Vascular and Endovascular Surgery, New York University Langone Health, New York, NY.
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Mullen E, Ratner M, Sobotka S, Rasouli J, Chartrain A, Wheelwright D, Griffiths S, Bederson J, Gordon E, Neibart E, Mayer S, Dangayach N. 790: THE PREDICTIVE VALUE OF INFLAMMATORY BIOMARKERS IN THE NEUROLOGIC CRITICAL CARE SETTING. Crit Care Med 2018. [DOI: 10.1097/01.ccm.0000528803.74119.aa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
The usual complications after a definitive pull-through procedure for Hirschsprung's disease include stricture formation, enterocolitis, bowel obstruction, and, occasionally, wound infection. The authors report a case of mucinous adenocarcinoma arising 32 years later at a stricture site from a previous pull-through procedure.
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Affiliation(s)
- C M Finck
- Arkansas Children's Hospital, Little Rock, AR 72202, USA
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Abstract
The authors presented the cases of two children with inflammatory myofibroblastic (IMF) tumor and reviewed the literature to facilitate the preoperative recognition, delineate the clinical features, and describe the natural history of this entity. The first child had IMF tumor arising from the mesentery of the small intestine. He presented with an abdominal mass associated with severe inflammatory response manifested by fever, impaired growth, thrombocytosis, and microcytic, hypochromic anemia. After surgical resection, his fever resolved and his growth rate and the laboratory abnormalities normalized. Five months after initial diagnosis, the fever, anemia, and thrombocytosis recurred along with two tumors arising from the omentum and the abdominal soft tissue. After the second surgery, he remains free of recurrent disease for 30 months. The second child presented with a lung mass that was radiologically indistinguishable from pulmonary sequestration. After surgical resection, she remains free of recurrent disease for 18 months. IMF tumor should be considered in any solid tumor that occurs in association with a chronic inflammatory response. IMF tumor should also be considered in the differential diagnosis of pulmonary sequestration.
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Affiliation(s)
- A K Souid
- Department of Pediatrics, SUNY Health Science Center, Syracuse 13210
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Abstract
The authors presented the cases of two children with inflammatory myofibroblastic (IMF) tumor and reviewed the literature to facilitate the preoperative recognition, delineate the clinical features, and describe the natural history of this entity. The first child had IMF tumor arising from the mesentery of the small intestine. He presented with an abdominal mass associated with severe inflammatory response manifested by fever, impaired growth, thrombocytosis, and microcytic, hypochromic anemia. After surgical resection, his fever resolved and his growth rate and the laboratory abnormalities normalized. Five months after initial diagnosis, the fever, anemia, and thrombocytosis recurred along with two tumors arising from the omentum and the abdominal soft tissue. After the second surgery, he remains free of recurrent disease for 30 months. The second child presented with a lung mass that was radiologically indistinguishable from pulmonary sequestration. After surgical resection, she remains free of recurrent disease for 18 months. IMF tumor should be considered in any solid tumor that occurs in association with a chronic inflammatory response. IMF tumor should also be considered in the differential diagnosis of pulmonary sequestration.
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Affiliation(s)
- A K Souid
- Department of Pediatrics, SUNY Health Science Center, Syracuse 13210
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Abstract
The authors presented the cases of two children with inflammatory myofibroblastic (IMF) tumor and reviewed the literature to facilitate the preoperative recognition, delineate the clinical features, and describe the natural history of this entity. The first child had IMF tumor arising from the mesentery of the small intestine. He presented with an abdominal mass associated with severe inflammatory response manifested by fever, impaired growth, thrombocytosis, and microcytic, hypochromic anemia. After surgical resection, his fever resolved and his growth rate and the laboratory abnormalities normalized. Five months after initial diagnosis, the fever, anemia, and thrombocytosis recurred along with two tumors arising from the omentum and the abdominal soft tissue. After the second surgery, he remains free of recurrent disease for 30 months. The second child presented with a lung mass that was radiologically indistinguishable from pulmonary sequestration. After surgical resection, she remains free of recurrent disease for 18 months. IMF tumor should be considered in any solid tumor that occurs in association with a chronic inflammatory response. IMF tumor should also be considered in the differential diagnosis of pulmonary sequestration.
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Affiliation(s)
- A K Souid
- Department of Pediatrics, SUNY Health Science Center, Syracuse 13210
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Ratner M. When Microheterogeneity Matters. Nat Biotechnol 1991; 9:25. [PMID: 1367208 DOI: 10.1038/nbt0191-25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ratner M, Serov VV, Warschawsky V, Subkin M, Stenina II, Smollich BP, Klinkmann H. [Clinical and morphologic factors for assessment of risk of progression of chronic glomerulonephritis]. Z Urol Nephrol 1990; 83:559-65. [PMID: 2095663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In 182 patients suffering from bioptical-proved and functional adapted chronic glomerulonephritis the relation between clinical course, morphological type and progression of disease has been evaluated. The presented results show a significant relation between the clinical course of chronic glomerulonephritis and the progression trend of this disease. The early finding of sclerotic changes may follow a benign course of the disease.
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Affiliation(s)
- M Ratner
- Institut für Transplantologie und Künstliche Organe, UdSSR Moskau
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Ratner M. The Cetus Experience: Troubles with Clinical Trials Design & Data Presentation. Nat Biotechnol 1990; 8:815-8. [PMID: 1366791 DOI: 10.1038/nbt0990-815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Abstract
It is shown that all Borel probability measures invariant under unipotent translations on homogeneous spaces of connected Lie groups are algebraic.
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Affiliation(s)
- M Ratner
- Department of Mathematics, University of California, Berkeley, CA 94720, USA
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Abstract
Administration of delta 9-tetrahydrocannabinol (THC; 0.75-4.0 mg/kg IP) to rhesus monkeys produced a biphasic pattern of high-voltage slow waves (HVSW) and fast waves (HVFW) EEG, along with behavioral depression and alertness, respectively. The HVSW phase appeared 20 to 30 min after drug injection and was uniquely characterized by spike-bursts in frontal and temporal lobes and hypothalamus, theta-waves in parietal and occipital lobes, and generalized HVSW in subcortical regions. During the HVSW phase, bradycardia and hypothermia occurred, and animals exhibited depression or sedation. After the HVSW phase lasting for 3-4 hr, HVFW predominated in overall EEGs with marked decrease in neocortical spike-bursts. Bradycardia and hypothermia occurred simultaneously 20 to 30 min after drug injection and reached maximal levels (30-40 percent decrease in heart rate, 1.5-2.0 degrees C decrease in body temperature) 2 to 3 hr after injection. The dose- and time-response relationships for bradycardia and hypothermia paralleled the HVSW phase with behavioral depression. Animals were alert and calm during recovery from bradycardia and hypothermia. THC levels and disposition in blood correlated with bradycardia, hypothermia and EEGs and behavioral changes following THC administration.
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Affiliation(s)
- M Matsuzaki
- New York State Division of Substance Abuse Services Testing and Research Laboratory, Brooklyn 11217
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Ratner M, Serov VV, Warschavski WA, Rosenfeld B, Subkin ML, Novikov ID, Sinn W, Klinkmann H. [Recommendations for a clinical classification of chronic glomerulonephritis]. Z Urol Nephrol 1987; 80:271-9. [PMID: 3617956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
As a result of the long-term treatment of 360 patients with histologically ascertained glomerulonephritis including 41 dead patients who had suffered from uraemia a clinical classification of the chronic glomerulonephritis (Ratner, M.) is presented. In detail 5 types of clinical course are characterized: Nephritic types of course: maximally active nephritic type of course, active nephritic type of course, inactive nephritic type of course. Nephrotic types of course: nephrotic type of course without hypertension, nephrotic type of course with hypertension. The elaborated clinical classification allows conclusions to underlying renal histology, tendency of the progression of the disease and prognosis, including survival time.
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Abstract
Epidermolysis bullosa letalis has been associated with congenital pyloric atresia in an autosomal recessive syndrome. This report documents the second occurrence in premature siblings. Our review indicates that it is a lethal condition with death due to the septic complications of epidermolysis bullosa letalis. Surgical management of pyloric atresia should be withheld until the severity of the epidermolysis is known. Skin biopsy to document the type of epidermolysis bullosa is imperative as only the letalis form is documented to be lethal. The risk for subsequent siblings is 25% and parents should undergo genetic counseling. Prenatal diagnosis of epidermolysis bullosa letalis can be made by fetoscopic skin biopsy. We suggest nonoperative management of pyloric atresia unless the skin disease is responsive to treatment.
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Sinn W, Ratner M, Tomilina N, Klinkmann H, Nizze H. [New results concerning the effectiveness of therapy of chronic glomerulonephritis. Results of cytostatics-anticoagulants-aggregation inhibitors, cystostatics-anticoagulants-aggregation inhibitors-prednisone and cystostatics-prednisone therapy, derived from a retrospective study]. Z Urol Nephrol 1986; 79:449-57. [PMID: 3535293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The indication and effectiveness of the immunosuppressive therapy of chronic glomerulonephritis is now as ever controversial. As a result of a retrospective therapy study in an at least one-year therapy with cytostatics, thrombocyte aggregation inhibitors and anticoagulants (CAA-therapy, n = 27), additional prednisone therapy (CAAP-therapy, n = 95) and cytostatic-prednisone therapy (CP-therapy, n = 33) we find favourable results for the CAA/CAAP-therapy in the nephrotic syndrome and glomerulonephritides with distinct clinical exacerbation also in sclerosations in histology. Clinically inactive nephritides with exclusive urinary findings and sclerosations cannot be influenced therapeutically.
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Ratner M, Wüstenberg P, Serov VV, Rosenfeld BI, Warschavsky WA, Brodsky MA, Stenina II, Nizze H, Sinn W, Schmicker R. Tubular function disturbances in chronic glomerulonephritis and their significance for identifying tubulointerstitial lesions. Nephron Clin Pract 1985; 39:117-21. [PMID: 3974773 DOI: 10.1159/000183354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The tubular and tubulointerstitial renal functions of 237 patients with chronic glomerulonephritis and functional compensation corresponding to their plasma creatinine levels were investigated and the results were compared with the light microscopic findings obtained by examination of kidney interstices obtained by biopsy. Pronounced structural interstitial lesions (TiC) were found in 30% of the cases. Investigation of the predictive values of tubular function data in respect of the presence or exclusion of TiC showed that, although individual parameters of the renal function permit the exclusion of TiC disturbances with a high degree of certainty, the diagnostic value can be enhanced by considering pairs of such parameters. Five parameter combinations were found to have the highest predictive value regarding the diagnosis of TiC. These were disturbed concentration capacity accompanied by reduced ammonia excretion or total acid excretion, reduced water diuresis accompanied by disturbed ammonia excretion or total acid elimination; and, finally, the total acid excretion and maximum dilution capacity. The highest predictive values for the exclusion of TiC are shown by inconspicuous concentration capacity accompanied by normal ammonia excretion, total acid excretion, water diuresis, free water clearance or urine dilution capacity.
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Ratner M, Wüstenberg P, Serov VV, Rosenfeld IB, Warschavsky WA, Brodsky MA, Stenina II, Nizze H, Sinn W, Schmicker R. [Correspondence of functional and structural findings in tubulo-interstitial disorders in chronic glomerulonephritis]. Z Urol Nephrol 1984; 77:711-20. [PMID: 6528753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In 237 patients with chronic glomerulonephritis and according to the serum creatinine level of functional compensation tubular and tubulointerstitial renal functions, respectively, were investigated and compared with the light-microscopic findings of the renal interstice. A distinct structural tubulointerstitial lesion (tiK) was found in 30%. The diagnostic predictivity for the recognition and the exclusion of the tiK was tested for single or paired data of the renal function. As a result it is possible with a suitable combination of parameters in on an average more than 80% of the cases to establish or to exclude function-diagnostically a tubulointerstitial structural lesion even in still inconspicuous creatinine values. From the clinical point of view thus the information value of functional diagnostic investigations of the renal water treatment is confirmed (concentration power, dilution ability, water diuresis), in which case the differentiated test of the renal acidification may supplement the informations about the tiK-situation.
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Abstract
Effects of acute and chronic administration of phencyclidine (PCP) on heart rate (HR) and respiratory rate (RR) were studied in rhesus monkeys. Acute administration of PCP (2.0 and 4.0 mg/kg i.v.) produced decrements in both HR and RR within 15 to 30 min after drug administration. Simultaneously, with this cardiorespiratory slowing, EEG tracings evidenced High-Voltage Slow-Waves (HVSW) and delta-waves. As HR and RR began to recover, High-Voltage Fast-Waves (HVFW) along with theta-waves developed in EEG recordings and persisted for 2-6 h, while both HR and RR were gradually returning to their respective pre-drug control levels. The intensity and duration of these PCP-induced effects were directly related to dosage level. Following chronic administration of PCP (daily dose of 2.0 or 4.0 mg/kg i.v.), its ability to produce cardiorespiratory alterations was significantly diminished along with a decrease in PCP-induced depression of EEG and behavioral activities. These results suggest that chronic PCP administration produces a tolerance to its depressant effect on HR, RR, EEG and behavioral activities in rhesus monkeys.
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Schmitt E, Sinn W, Lakner V, Ratner M, Tomilina N. [Glomerulonephritis therapy. Immunosuppression or coagulation inhibitors - a comparison]. Z Gesamte Inn Med 1980; 35:Suppl 45-8. [PMID: 7467565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In 110 patients with mesangioproliferative glomerulonephritis the treatment (n = 48) with chlorambucil, warfarin, dipyridamol and prednisone (CAA) and the treatment with imuran and prednisone (CP, n = 23) are compared with the conditions of an untreated control group. The CAA-therapy is above all suited for active clinical pictures without sclerosis with short duration of the disease, even when the renal function is already restricted. The CP-therapy is suitable in non-active forms with sclerosis also in a longer duration of the disease.
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Schmitt E, Kröger E, Lakner V, Klinkmann H, Ratner M, Tomilina N. [Therapy of primary glomerulonephritis. Comparative study on the effect of cytostatics-prednisone and cytostatics-anticoagulant-aggregation inhibitor combination]. Z Gesamte Inn Med 1979; 34:465-71. [PMID: 539014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The result of the treatment with chlorambucil, dipyridamol, heparin/warfarin and prednisone on 50 patients as well as with imuran and prednisone on 32 patients is compared. Basis for this is a detailed morphological and clinical subdivision. With the help of therapy results is tried to derive regions of indication: the therapy with cytostatics, anticoagulants and aggregation inhibitors is above all suitable for patients with a short duration of the disease and with sign of activity, also in renal insufficiency. On the other hand the therapy with cytostatics and prednisone is also successful in patients with longer duration of the disease and missing signs of activity.
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Abstract
The rate of incorporation of 3H-leucine into proteins of the synaptic junctional and nonjunctional membranes and synaptic vesicles of rat brain has been examined in control and morphine-tolerant rats. There are no discernible differences between control and tolerant animals in amount of protein as measured by densitometric tracings of dye-stained proteins separated by acrylamide gel electrophoresis from the three membrane fractions of whole brain areas. However, there are differences in the turnover of membrane protein: three vesicle protein bands and one junctional-membrane protein band are significantly more highly labeled, and one junctional-membrane protein is significantly less highly labeled by 3H-leucine in samples from tolerant rats. Of these, the two junctional-membrane proteins can be tentatively identified as components of the post synaptic densities, and one of the vesicle proteins as tubulin.
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Quinteros CM, Chehín E, Wayar E, Ratner M, Amadio G. [Isoprodiane therapy for previously untreated cavitating pulmonary tuberculosis (author's transl)]. Prax Klin Pneumol 1979; 33:45-7. [PMID: 760101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Isoprodiane (a combination of isoniazid, prothionamide and dapsone) was given to 22 persons with open cavitating pulmonary tuberculosis. None of them had been treated before. Microscopic and cultural sputum conversion occurred within an average of 5 and 11 weeks respectively. Treatment was discontinued in five patients: as a safety measure, despite sputum conversion, on account of the extent of the process and the general condition of the patient (one case); because of side-effects (two cases, one of whom was hypersensitive to isoniazid); because the patients failed to continue with the treatment (two cases). The early results were very promising; the long-term results cannot yet be assessed. The therapy did not materially affect the haemoglobin levels.
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Ratner M. Heterogeneous Catalysis:
Catalysis by Electron Donor-Acceptor Complexes
. Their General Behavior and Biological Roles. Kenzi Tamaru and Masaru Ichikawa. Kodansha, Tokyo, and Halsted (Wiley), New York, 1976. viii, 208 pp., illus. $19. Science 1976; 193:880. [PMID: 17753633 DOI: 10.1126/science.193.4256.880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Ratner M. [Report on the 1st Congress of the Society of Scientific Nephrologists of the U.S.S.R]. Z Urol Nephrol 1975; 68:667-70. [PMID: 1227193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Clouet D, Johnson J, Ratner M, Williams N, Gold G. The effect of morphine on rat brain catecholamines: Turnover in vivo and uptake in isolated synaptosomes. Biochem Pharmacol 1974. [DOI: 10.1016/0006-2952(74)90150-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Linderberg J, Jo/rgensen P, Oddershede J, Ratner M. Self‐Consistent Polarization Propagator Approximation as a Modified Random Phase Method. J Chem Phys 1972. [DOI: 10.1063/1.1677174] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Abstract
In the brains of rats without tolerance to morphine, the accumulation of [(14)C]dopamine formed from [(14)C]tyrosine injected intracisternally is increased, reaching a maximum in the hypothalamus and striatum 1 hour after administration of morphine. In tolerant rats, the rate of incorporation of carbon-14 into dopamine and into norepinephrine in these areas is more than twice that in animals that have received only one injection of morphine.
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Clouet DH, Ratner M. The effect of morphine administration on the incorporation of [14-C]leucine into protein in cell-free systems from rat brain and liver. J Neurochem 1968; 15:17-23. [PMID: 5638132 DOI: 10.1111/j.1471-4159.1968.tb06168.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Clouet DH, Ratner M. The effect of the administration of morphine on the incorporation of [14C]leucine into the proteins of rat brain in vivo. Brain Res 1967; 4:33-43. [PMID: 6029945 DOI: 10.1016/0006-8993(67)90146-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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