Atherectomy-assisted versus percutaneous angioplasty interventions for treatment of symptomatic infra-inguinal peripheral arterial disease.

Introduction: The role of atherectomy (ATHERO) for the treatment of symptomatic infra-inguinal arterial lesions remains controversial. We evaluated the effectiveness and safety of atherectomy-assisted endovascular interventions in comparison with percutaneous angioplasty (PTA).

Material And Methods: A systematic search utilizing MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials was conducted for studies comparing ATHERO with PTA from February 1995 to May 2018.

Bivalirudin versus unfractionated heparin in peripheral vascular interventions.

Background: A number of studies suggest that bivalirudin (BIV) is associated with similar efficacy but reduced bleeding when compared with unfractionated heparin (UFH) in patients undergoing peripheral vascular interventions (PVI).

Methods: A comprehensive literature search was conducted with the electronic databases MEDLINE, EMBASE and CENTRAL. These were queried to identify studies comparing BIV with UFH in PVI.

Thoracic endovascular repair versus medical management for acute uncomplicated type B aortic dissection.

Background: Current treatment options and outcomes for acute uncomplicated thoracic Type-B aortic dissection (TBAD) remain unclear between medical management (MED) and thoracic endovascular aortic repair (TEVAR). In this study we aim to compare both strategies in terms of all-cause mortality, aortic dilation, and aortic rupture.

Methods: MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were queried from January 1990 through March 2017.

Fractional flow reserve versus angiography guided percutaneous coronary intervention: An updated systematic review.

Objectives: To compare outcomes of fractional flow reserve (FFR) to angiography (ANGIO) guided percutaneous coronary intervention (PCI).

Background: The results of a recent randomized controlled trial reported unfavorable effects of routine measurement of FFR, thereby questioning its validity in improving clinical outcomes.

Methods: MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were queried from January, 2000 through December, 2016 and studies comparing FFR and ANGIO guided PCI were included.

Comparison of Outcomes of ST-Elevation Myocardial Infarction Treated by Percutaneous Coronary Intervention During Off-Hours Versus On-Hours.

Previous studies have reported worse outcomes and longer door-to-balloon times (DBTs) in patients presenting with ST-elevation myocardial infarction (STEMI) after normal working hours, during weekends, and on holidays (off-hours) compared with normal business hours (on-hours). Recent studies, however, have reported similar outcomes regardless of presentation time. MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were queried from January 1990 through December 2016.

Endovascular versus surgical treatment for acute limb ischemia: a systematic review and meta-analysis of clinical trials.

Background: A number of small studies have suggested that outcomes following endovascular (ENDO) therapy are comparable to those following surgical (SURG) revascularization for patients presenting with acute limb ischemia (ALI). We sought to compare mortality, limb amputation and recurrent ischemia across both revascularization strategies.

Methods: A comprehensive database search of MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials (CENTRAL) electronic databases from January 1990 through January 2016 was performed to identify studies of ENDO versus SURG for ALI.

Proximal balloon occlusion versus distal filter protection in carotid artery stenting: A meta-analysis and review of the literature.

Introduction: Carotid artery stenting (CAS) is typically performed using embolic protection devices (EPDs) as a means to reduce the risk of procedure-related stroke. In this study, we compared procedural morbidity and mortality associated with distal (D-EPD) vs. proximal (P-EPD) protection.

Hemorrhagic and ischemic outcomes of Heparin vs. Bivalirudin in carotid artery stenting: A meta-analysis of studies.

Introduction: Bivalirudin, has been shown to have comparable efficacy and better safety profile when compared to unfractionated heparin (UFH) in percutaneous coronary interventions. Bivalirudin's safety in carotid artery stenting (CAS) was associated with better outcomes than heparin in some studies. In this Meta analysis we examine the hemorrhagic and ischemic outcomes associated with Bivalirudin compared to UFH during CAS.

Diazoxide maintains human myocyte volume homeostasis during stress.

Background: Exposure to hypothermic hyperkalemic cardioplegia, hyposmotic stress, or metabolic inhibition results in significant animal myocyte swelling (6% to10%) and subsequent reduced contractility (10% to 20%). Both are eliminated by the adenosine triphosphate-sensitive potassium channel opener diazoxide (DZX). The relationship between swelling and reduced contractility suggests that the structural change may represent one mechanism of postoperative myocardial stunning.

An open sarcolemmal adenosine triphosphate-sensitive potassium channel is necessary for detrimental myocyte swelling secondary to stress.

Background: Stress (exposure to hyperkalemic cardioplegia, metabolic inhibition, or osmotic) results in significant myocyte swelling and reduced contractility. In contrast to wild-type mice, these detrimental consequences are not observed in mice lacking the Kir6.2 subunit of the sarcolemmal ATP-sensitive potassium (sK(ATP)) channel after exposure to hyperkalemic cardioplegia.

Diazoxide maintenance of myocyte volume and contractility during stress: evidence for a non-sarcolemmal K(ATP) channel location.

Objective: Animal and human myocytes demonstrate significant swelling and reduced contractility during exposure to stress (metabolic inhibition, hyposmotic stress, or hyperkalemic cardioplegia), and these detrimental consequences may be inhibited by the addition of diazoxide (adenosine triphosphate-sensitive potassium channel opener) via an unknown mechanism. Both SUR1 and SUR2A subunits have been localized to the heart, and mouse sarcolemmal adenosine triphosphate-sensitive potassium channels are composed of SUR2A/Kir6.2 subunits in the ventricle and SUR1/Kir6.

Recurrent mitral regurgitation and risk factors for early and late mortality after mitral valve repair for functional ischemic mitral regurgitation.

Background: Mortality for patients with coronary artery disease and functional ischemic mitral regurgitation (IMR) remains high regardless of the treatment strategy. Data regarding risk factors, progression of MR, and cause of death in this subgroup are limited.

Methods: A retrospective study was performed on 257 consecutive patients undergoing mitral valve repair exclusively for IMR from 1996 to 2005.

Maintenance of myocyte volume homeostasis during stress by diazoxide is cardioprotective.

Background: We previously demonstrated that myocyte swelling and reduced contractility secondary to hyperkalemic cardioplegia and hyposmotic stress are attenuated by the addition of diazoxide, an adenosine triphosphate-sensitive potassium channel (K(ATP)) opener. The goal of this study was to investigate the effect of diazoxide on myocyte swelling and reduced contractility after metabolic inhibition and to attempt to summarize the potential mechanisms involved.

Methods: Isolated rabbit myocytes were perfused with Tyrode's control solution for 20 minutes, followed by test solution for 20 minutes.

Significance of neurologic complications in the modern era of cardiac transplantation.

Background: Severe neurologic complications after cardiac transplantation are devastating outcomes of this life-saving procedure. Incidence, risk factors, and morbidity of neurologic events in the modern era of cardiac transplantation are yet to be defined.

Methods: Between 1996 and 2005, 200 patients (64% men; mean age, 49 +/- 12 years) underwent heart transplantation at our institution.

Implantable cardioverter-defibrillators improve survival after coronary artery bypass grafting in patients with severely impaired left ventricular function.

Objective: Patients with severe left ventricular (LV) dysfunction have a poor long term survival despite complete surgical revascularization. Recent data suggests that the use of Implantable Cardioverter-Defibrillator (ICD) improves survival in patients with severe LV dysfunction. We compared the survival impact of ICD implantation in patients with severe LV dysfunction who underwent CABG.

Hyperkalemic cardioplegia-induced myocyte swelling and contractile dysfunction: prevention by diazoxide.

Background: Hyperkalemic cardioplegia (9 degrees C) results in significant myocyte swelling and reduced contractility, representing a possible mechanism of myocardial stunning. Adenosine triphosphate-sensitive potassium channel (KATP) openers have been shown to ameliorate stunning. This study evaluated the hypothesis that a KATP opener would prevent hyperkalemic cardioplegia-induced myocyte swelling and reduced contractility.

Role of the sarcolemmal adenosine triphosphate-sensitive potassium channel in hyperkalemic cardioplegia-induced myocyte swelling and reduced contractility.

Background: Hyperkalemic cardioplegia (Plegisol) has been shown to result in myocyte swelling and reduced contractility. We have demonstrated the elimination of these detrimental effects by the addition of an adenosine triphosphate-sensitive K+ (KATP) channel opener. To examine whether the mitochondrial or sarcolemmal KATP channel might be involved, volume and contractility in isolated myocytes from wild-type mice and mice lacking the sarcolemmal KATP channel (Kir6.