Publications by authors named "Itoga Nathan"

Along with the rising burden of peripheral artery disease (PAD), mental health concerns are increasingly being recognized as a comorbidity to address in the chronic disease management of symptomatic PAD. Apart from a high prevalence of comorbid mental health conditions, the role of pain and changing health behaviors and the broader impacts of illness and adaptation to living with PAD require specialized behavioral health expertise. This scientific statement builds a case that this expertise should be integrated within the multidisciplinary PAD team.

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Background: SBP and DBP have important associations with cardiovascular events, but are seldom considered simultaneously.

Objectives: This study sought to simultaneously analyze systolic blood pressure (SBP) and diastolic blood pressure (DBP) measurements on the associated risk of a primary composite outcome of all-cause mortality, myocardial infarction (MI), congestive heart failure (CHF), or stroke.

Methods: This study analyzed ALLHAT (Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial) data, which randomized adults to chlorthalidone, amlodipine, or lisinopril.

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Article Synopsis
  • Screening for peripheral artery disease (PAD) using the ankle-brachial index (ABI) is not currently recommended for the general population, but some studies suggest it could benefit high-risk groups such as those with coronary artery disease (CAD).
  • A Markov model was utilized to assess the cost-effectiveness of PAD screening in CAD patients, considering costs related to the screening test, physician visits, and low-dose rivaroxaban, over a long-term period.
  • The results indicated that while screening has a high incremental cost-effectiveness ratio (ICER), making it less cost-effective at current rivaroxaban prices, lowering its cost below $95 per month could make screening beneficial based on common cost-effectiveness thresholds.
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Objective: The use of radiographic evaluation of carotid disease may vary, and current guidelines do not strongly recommend the use of cross-sectional imaging (CSI) prior to surgical intervention. We sought to describe the trends in preoperative carotid imaging and evaluate the associated clinical outcomes and Medicare payments for patients undergoing carotid endarterectomy (CEA) for asymptomatic carotid disease.

Methods: We used a 20% Medicare sample from 2006 to 2014 identifying patients undergoing CEA for asymptomatic disease.

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Background: Thoracic endovascular aortic repair (TEVAR) is indicated for treatment of aneurysms, dissections, and traumatic injury. We describe mid-term mortality and reintervention rates in Medicare beneficiaries undergoing TEVAR.

Study Design: Patients who underwent TEVAR between 2006 and 2014 were identified by CPT codes in a 20% Medicare sample.

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Objectives: The superficial femoral artery can be used as inflow for infra-geniculate bypass, but progressive proximal occlusive disease may affect graft durability. We sought to evaluate the effect of superficial femoral artery versus common femoral artery inflow on infra-geniculate bypass patency within a large contemporary multicenter registry.

Methods: The vascular quality initiative was queried from 2013 to 2019 to identify patients with >30-day patency follow-up, Rutherford chronic limb ischemia stage 1-6, and an infra-geniculate bypass, excluding those with prior ipsilateral bypass.

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Objective: Percutaneous interventions for peripheral artery disease (PAD) are transitioning away from hospital-based settings to office-based laboratories (OBLs). Those in favor of OBL use reference lower hospitalization rates and high efficiency; however, critics claim financial incentives may lead to multiple procedures and higher atherectomy use. We sought to determine how Medicare payments are affected by OBL use.

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Background: Thoracic endovascular aortic repair (TEVAR) has become first-line treatment for descending thoracic aortic rupture (DTAR), but its midterm and long-term outcomes remain undescribed. This study evaluated whether TEVAR would improve midterm outcomes of nontraumatic DTAR relative to open surgical repair (OSR).

Methods: Between December 1999 and October 2018, 118 patients with DTAR were treated with either OSR (n = 39) or TEVAR (n = 79) at a single center.

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Preprocedural cross-sectional imaging (PCSI) for peripheral artery disease (PAD) may vary due to patient complexity, anatomical disease burden, and physician preference. The objective of this study was to determine the utility of PCSI prior to percutaneous vascular interventions (PVIs) for PAD. Patients receiving first time lower extremity angiograms from 2013 to 2015 at a single institution were evaluated for PCSI performed within 180 days, defined as computed tomography angiography (CTA) or magnetic resonance angiography (MRA) evaluating abdominal to pedal vasculature.

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Objective: Multivessel tibial revascularization for critical limb ischemia (CLI) remains controversial. The purpose of this study was to evaluate single vs multiple tibial vessel interventions in patients with multivessel tibial disease. We hypothesized that there would be no difference in amputation-free survival between the groups.

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Purpose: We presented a new method of sac embolization using n-butyl-cyanoacrylate (NBCA) with balloon occlusion of the aorta (SEBOA) that can facilitate decreasing flow rate of the involved branches with the goal of type 2 endoleak resolution after endovascular aortic repair (EVAR).

Technique: This technique is demonstrated in six patients who required type 2 endoleak treatment including previous technical failure. A transarterial approach was performed in four patients and transabdominal direct puncture in two.

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Article Synopsis
  • Endovascular treatment of infrarenal abdominal aortic aneurysm (AAA) with chronic aortic dissection is complicated due to the presence of both a true and false lumen, which limits effective surgical intervention.
  • A staged approach involving endovascular neck stabilization is described, where entry tears are closed to promote false lumen thrombosis (FLT) before proceeding with standard endovascular aortic repair (EVAR).
  • Successful outcomes from two cases demonstrate that this technique prevents endoleaks and simplifies the repair process for patients with this challenging condition.
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Background: Percutaneous vascular interventions (PVIs) for peripheral artery disease have shifted from hospital-based facilities to office-based laboratories (OBLs). The transition to OBLs is due to a variety of factors such as technology advancement, increased efficiency, and financial incentives. We evaluated the impact of physicians switching to OBLs use from hospital-based facilities on procedure volume, procedure type, and patient outcomes.

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Article Synopsis
  • The study examined the risk factors and incidences of deep vein thrombosis (DVT) following radiofrequency ablation (RFA) and laser ablation (LA) procedures for treating superficial venous insufficiency.
  • There were 256,999 patients considered, with a DVT incidence of 1.9% at 7 days and 3.1% at 30 days; LA showed a lower DVT rate (2.8%) than RFA (3.4%).
  • Factors such as being female, having sclerotherapy on the same day, or undergoing LA reduced DVT risk, while having peripheral artery disease or undergoing stab phlebectomy increased the risk within 30 days.
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Introduction: This study evaluated the mid-term patency of forearm loop arteriovenous grafts and the dilation of previously inadequate upper arm basilic and cephalic veins after failed forearm loop arteriovenous graft.

Methods: All access procedures from September 2009 to December 2015 were reviewed. Vein mapping measurements were used to determine whether there was "adequate" upper arm cephalic and/or basilic vein, defined as ⩾3 mm by duplex ultrasound, at the time of forearm loop arteriovenous graft creation.

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Background: Prescription opioids account for 40% of all U.S. opioid overdose deaths, and national efforts have intensified to reduce opioid prescriptions.

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Background: Limited reports have documented the effect cardiac implantable electronic devices (CIEDs) have on arteriovenous (AV) access patency. Current recommendations suggest placing the access on the contralateral side of the CIEDs, as there is concern for increased central venous stenosis and access failure. The goal of this study is to review our single-center AV access patency rates for dialysis patients with an ipsilateral or contralateral side CIED.

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Article Synopsis
  • The study explored the potential role of metformin in slowing down the growth of abdominal aortic aneurysms (AAAs) in a large cohort of patients with diabetes.
  • Researchers analyzed data from over 13,000 patients in the Veterans Affairs Health Care System who had multiple imaging studies documenting their AAA over several years.
  • The results suggested that the average growth rate of AAAs was about 1.4 mm per year, but it was also observed that the growth rate was similar among patients on metformin, indicating that more research is needed to confirm any protective effects of the medication against AAA expansion.
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Objective: Effective strategies to reduce costs associated with endovascular aneurysm repair (EVAR) remain elusive for many medical centers. In this study, targeted interventions to reduce inpatient EVAR costs were identified and implemented.

Methods: From June 2015 to February 2016, we analyzed the EVAR practice at a high-volume academic medical center to identify, to rank, and ultimately to reduce procedure-related costs.

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Background: Current guidelines recommend treating hypertension in patients with peripheral artery disease (PAD) to reduce the risk of cardiac events and stroke, but the effect of reducing blood pressure on lower extremity PAD events is largely unknown. We investigated the association of blood pressure with lower extremity PAD events using data from the ALLHAT trial (Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial).

Methods: ALLHAT investigated the effect of different antihypertensive medication classes (chlorthalidone, amlodipine, lisinopril, or doxazosin) on cardiovascular events.

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Mycotic renal artery aneurysms are rare and can be difficult to diagnose. Classic symptoms such as hematuria, hypertension, or abdominal pain can be vague or nonexistent. We report a case of a 53-year-old woman with a history of intravenous drug abuse presenting with critical limb ischemia, in which CT angiography identified a mycotic renal aneurysm.

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The Nellix device uses polymer-filled endobags to stabilize the abdominal aortic aneurysm (AAA) sac which is described as endovascular aneurysm sealing (EVAS). We analyzed cardiac-gated computed tomography angiography scans of repaired AAA with EVAS in 4 patients to evaluate the geometry and cardiac pulsatility-induced deformation. Graft translation and aortic curvature changes were found to be minimal during the cardiac cycle.

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Screening for asymptomatic peripheral artery disease (aPAD) with the ankle-brachial index (ABI) test is hypothesized to reduce disease progression and cardiovascular (CV) events by identifying individuals who may benefit from early initiation of medical therapy. Using a Markov model, we evaluated the cost effectiveness of initiating medical therapy (e.g.

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Objective: The objective of this study was to describe the polar orientation of renal chimney grafts within the proximal seal zone and to determine whether graft orientation is associated with early type IA endoleak or renal graft compression after chimney endovascular aneurysm repair (ch-EVAR).

Methods: Patients who underwent ch-EVAR with at least one renal chimney graft from 2009 to 2015 were included in this analysis. Centerline three-dimensional reconstructions were used to analyze postoperative computed tomography scans.

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