Effect of evolocumab in patients with chronic limb threatening ischemia (Evol-CLI study).

Background: Chronic limb-threatening ischemia (CLTI) is associated with increased risk of major adverse cardiac and limb events (MACLE). In patients with peripheral arterial disease (PAD), evolocumab is associated with decreased MACLE, improved maximal walking time, increased vascular flow-mediated dilation (FMD), and decreased carotid intima-media thickness (IMT). We investigated the additive effect of evolocumab in patients with CLTI on maximally tolerated lipid lowering therapy after an index revascularization for non-healing wounds.

The impact of revascularization strategy on clinical failure, hemodynamic failure, and chronic limb-threatening ischemia symptoms in the BEST-CLI Trial.

Objective: Sustained clinical and hemodynamic benefit after revascularization for chronic limb-threatening ischemia (CLTI) is needed to resolve symptoms and prevent limb loss. We sought to compare rates of clinical and hemodynamic failure as well as resolution of initial and prevention of recurrent CLTI after endovascular (ENDO) vs bypass (OPEN) revascularization in the Best-Endovascular-versus-best-Surgical-Therapy-in-patients-with-CLTI (BEST-CLI) trial.

Methods: As planned secondary analyses of the BEST-CLI trial, we examined the rates of (1) clinical failure (a composite of all-cause death, above-ankle amputation, major reintervention, and degradation of WIfI stage); (2) hemodynamic failure (a composite of above-ankle amputation, major and minor reintervention to maintain index limb patency, failure to an initial increase or a subsequent decrease in ankle brachial index of 0.

Baseline modern medical management in the BEST-CLI trial.

Objectives: The use of optimal medical therapy (OMT) in patients with chronic limb-threatening ischemia (CLTI) has not been well-studied. The Best Endovascular vs Best Surgical Therapy in Patients with CLTI study (BEST-CLI) is a multicenter, randomized, controlled trial sponsored by the National Institutes of Health comparing revascularization strategies in patients with CLTI. We evaluated the use of guideline-based OMT among patients with CLTI at the time of their enrollment into the trial.

The addition of evolocumab to maximal tolerated statin therapy improves walking performance in patients with peripheral arterial disease and intermittent claudication (Evol-PAD study).

Objective: To test the hypothesis that in patients with peripheral arterial disease (PAD) and claudication, treated with maximal tolerated statin therapy, the addition of a monthly subcutaneous injection of evolocumab for 6 months improves treadmill walking performance.

Background: Lipid lowering therapy improves walking parameters in patients with PAD and claudication. Evolocumab decreases cardiac and limb adverse events in patients with PAD; however, the effect of evolocumab on walking performance is not known.

Relationship between WIfI stage and quality of life at revascularization in the BEST-CLI trial.

Objective: The WIfI (Wound, Ischemia, foot Infection) stage measures the extent of wounds, ischemia, and foot infection in patients with chronic limb threatening ischemia (CLTI) and has been associated with the risk of major amputation. Patients with CLTI have impaired health-related quality of life (HRQoL), which can be multifactorial. We hypothesized that the severity of the limb threat (WIfI stage) would be associated with poor HRQoL among patients with CLTI presenting for revascularization.

Surgery or Endovascular Therapy for Chronic Limb-Threatening Ischemia.

Background: Patients with chronic limb-threatening ischemia (CLTI) require revascularization to improve limb perfusion and thereby limit the risk of amputation. It is uncertain whether an initial strategy of endovascular therapy or surgical revascularization for CLTI is superior for improving limb outcomes.

Methods: In this international, randomized trial, we enrolled 1830 patients with CLTI and infrainguinal peripheral artery disease in two parallel-cohort trials.

Evaluation of percutaneous transcatheter embolization for pulmonary arteriovenous malformations.

Background: The purpose of this study was to assess the safety and efficacy of percutaneous transcatheter embolization (TCE) for the treatment of pulmonary arteriovenous malformations (PAVMs).

Methods: Forty-three consecutive patients (n = 17 males; n = 26 females) with 72 untreated PAVMs underwent coil and/or plug embolization between January 2010 and February 2018. The mean patient age was 42 ± 14 years (range 19-71 years).

Anticoagulation Patterns in Patients with Atrial Fibrillation Following Percutaneous Coronary Intervention in an Academic Center.

A common dilemma facing physicians treating patients with atrial fibrillation (AF) who have undergone percutaneous coronary intervention (PCI) is the management of oral anticoagulation (OAC) therapy, because there is also an indication for dual antiplatelet therapy in these patients. The purpose of this study was therefore to evaluate anticoagulation patterns in this patient population in an attempt to identify patterns of risk factors that may influence OAC prescribing habits. This retrospective study entailed a review of a total of 4,648 patients from two academic hospitals who underwent PCI between 2008 and 2016.

Factors Associated With the Use of Bare Metal Stents in Patients With ST Elevation Myocardial Infarction.

Background: Drug eluting stents (DES) are used in the majority of patients undergoing percutaneous coronary intervention (PCI). Factors associated with the use of bare metal stents (BMS) for patients undergoing primary PCI for ST elevation myocardial infarction (STEMI) have not been adequately explored. The objective of this study was to evaluate factors associated with BMS use in STEMI patients undergoing primary PCI.

Predictors of Major Adverse Limb Events after Open Forefoot Amputation in Patients with Chronic Limb-Threatening Ischemia.

Background: Management of patients with chronic limb-threatening ischemia (CLTI) and extensive foot necrosis presents a challenge for limb salvage. Our study evaluates preoperative risk factors that contributed to durability and efficacy of limb salvage after open transmetatarsal amputation (TMA) in patients with critical limb-threatening ischemia.

Methods: We abstracted data from patients who underwent open TMA at Los Angeles County-University of Southern California Medical Center and Keck Hospital of University of Southern California from 2009 to 2018.

"The Renal Foot" - Angiographic Pattern of Patients with Chronic Limb Threatening Ischemia and End-Stage Renal Disease.

Background: Patients with chronic limb threatening ischemia (CLTI) and end-stage renal disease (ESRD) have greater risk of limb loss compared to those with CLTI alone. We investigated angiographic patterns in patients with CLTI and evaluated for differences based on ESRD status.

Methods: We reviewed lower extremity angiograms of 152 CLTI patients at a single academic medical center from 2011 to 2017 and analyzed them based on the Graziani and Bollinger classification systems.

Therapeutic Window of Clopidogrel and Ticagrelor in Patients With Critical Limb-Threatening Ischemia.

Background: Critical limb-threatening ischemia (CLTI) is associated with an increased risk of major adverse limb events and mortality. High on-treatment platelet reactivity (HPR) is associated with an increased risk of ischemic events, while low on-treatment platelet reactivity (LPR) is associated with an increased risk of bleeding. This study investigates the frequency with which patients with CLTI on clopidogrel or ticagrelor achieve a "therapeutic window" (TW) of platelet inhibition.

How to Create a Hot Foot Line to Prevent Diabetes-Related Amputations: Instant Triage for Emergency Department and Inpatient Consultations.

Emergency department visits for lower extremity complications of diabetes are extremely common throughout the world. Surprisingly, recent data suggest that such visits generate an 81.2% hospital admission rate with an annual bill of at least $1.

In-Hospital Outcomes of Rotational Atherectomy in High-Risk Patients With Severely Calcified Left Main Coronary Artery Disease: A Single-Center Experience.

Background: Severe coronary artery calcification is a challenge for percutaneous coronary intervention (PCI), particularly in left main coronary artery disease (LM-CAD). Rotational atherectomy (RA) is a useful tool for modification of calcified plaque prior to PCI. We report our experience with RA for severely calcified LM-CAD.

Use of the STEMI Team for Treatment of Patients With Pulmonary Embolism: A Pilot Study.

Background: Patients with massive and submassive pulmonary embolism (PE) require rapid identification, triage, and consideration for reperfusion therapy. Use of an existing ST-segment elevation myocardial infarction (STEMI) team and activation protocol may be an effective means to care for these patients.

Objective: The objective of this analysis was to evaluate a pilot study using the STEMI team and a dedicated PE protocol for treatment of patients with massive and submassive PE.

Comparison of devices used in carotid artery stenting: A vascular quality initiative analysis of commonly used carotid stents and embolic protection devices.

Background: Data regarding efficacy of various stent and embolic protection device (EPD) combinations to prevent stroke during carotid artery stenting (CAS) is limited. We compared post-procedure inpatient neurologic outcomes across various carotid stent-EPD platforms recorded in the Vascular Quality Initiative (VQI) registry.

Methods: We analyzed 13,786 consecutive CAS procedures in the VQI registry performed between January 1, 2005 and December 31, 2015.

Switch to Ticagrelor in critical limb ischemia antiplatelet study (STT-CLIPS).

Objective: To investigate platelet reactivity in patients with critical limb ischemia (CLI) after switching from clopidogrel to ticagrelor.

Background: High on-treatment platelet reactivity (HPR) is highly prevalent in patients with CLI treated with clopidogrel. The effect of ticagrelor in patients with CLI is not known, however.

Prevalence of high on-treatment (aspirin and clopidogrel) platelet reactivity in patients with critical limb ischemia.

Objectives: The goal of this study is to establish the prevalence of high on-treatment platelet reactivity to aspirin (HPRA) and clopidogrel (HPRC) in patients with critical limb ischemia (CLI).

Background: CLI is associated with an increased risk of death and cardiovascular events. Unlike other patient populations with atherosclerotic cardiovascular disease, previous studies failed to demonstrate a benefit of antiplatelet therapy in patients with CLI.

Computerized tomography angiography by direct intra-aortic low volume contrast injection in patients being evaluated for EVAR.

Background Computerized tomography angiography is an important tool for endovascular repair of abdominal aortic aneurysm planning. This study aimed to evaluate the utility of computerized tomography angiography using direct intra-aortic injection of low volume of iodinated contrast in patients being considered for endovascular repair of abdominal aortic aneurysm. Design A 5F high-flow angiographic catheter was positioned in the mid-thoracic aorta through femoral percutaneous access.

Same-day discharge after coronary stenting and femoral artery device closure: A randomized study in stable and low-risk acute coronary syndrome patients.

Objective: To compare same-day (SD) vs. delayed hospital discharge (DD) after single and multivessel coronary stenting facilitated by femoral closure device in patients with stable angina and low-risk acute coronary syndrome (ACS).

Methods: University of Southern California patients were screened and coronary stenting was performed in 2480 patients.

Platelet inhibition with ticagrelor versus clopidogrel in Hispanic patients with stable coronary artery disease with or without diabetes mellitus.

Background/purpose: Diabetes mellitus (DM) disproportionately affects Hispanic patients. DM patients have enhanced platelet reactivity and reduced sensitivity to clopidogrel. Ticagrelor demonstrated a more rapid onset and greater magnitude of platelet inhibition than clopidogrel in Hispanic patients with stable coronary artery disease (CAD).

Critical limb ischemia.

Critical limb ischemia (CLI), the most advanced form of peripheral artery disease (PAD), carries grave implications with regard to morbidity and mortality. Within 1 year of CLI diagnosis, 40% to 50% of diabetics will experience an amputation, and 20% to 25% will die. Management is optimally directed at increasing blood flow to the affected extremity to relieve rest pain, heal ischemic ulcerations, avoid limb loss, and prevent cardiovascular events.

Use of regadenoson for measurement of fractional flow reserve.

Objective: To compare the use of regadenoson to adenosine for measurement of fractional flow reserve (FFR).

Background: FFR is an accepted method to assess the functional significance of intermediate coronary artery stenoses and uses adenosine to induce maximal hyperemia. The use of the selective A2a receptor agonist regadenoson for FFR is not established.

Acute ST segment elevation during exercise stress echocardiography due to severe pulmonary hypertension.

A 51-year-old female undergoing an outpatient stress echocardiogram to evaluate atypical chest pain developed acute ST elevation in the anterior precordial leads on electrocardiogram following exercise. Echocardiography revealed a severe rise in pulmonary artery systolic pressure (PASP) with marked right ventricular (RV) enlargement and interventricular septum flattening. Subsequently, cardiac catherization confirmed an exercise-induced elevation in PASP and diagnosed pulmonary arterial hypertension without evidence of coronary artery disease.