Publications by authors named "Sameer K Mehta"

Aim Of The Study: To assess the relationship between the severity of liver cirrhosis and its outcomes based on laboratory parameters, Child-Turcotte-Pugh (CTP) score, and upper gastrointestinal (UGI) endoscopy findings.

Background:  Cirrhosis is the end stage of chronic liver disease (CLD) and is characterised by progressive liver fibrosis and distortion of the liver architecture. It is a major cause of morbidity and mortality all over the world.

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Neurological involvement after coronavirus disease (COVID-19) pneumonias is common and occurs in almost one-third of the patients. The commonest neurological symptoms are ageusia, anosmia, headache, nausea, vomiting, dizziness, and myalgia. Guillain-Barre syndrome (GBS) is a rare manifestation of severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) infection; whereas the common neurological manifestations of the SARS-CoV-2 infection occur with the onset of the respiratory symptoms and may be due to the direct invasion of the nervous system by the virus, GBS in COVID-19 follows a time lag of 1-4 weeks and may be attributable to the immune mechanism of molecular mimicry.

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Caroli's syndrome is a rare autosomal recessive congenital disorder of the biliary tree characterized by intrahepatic bile duct dilation and hepatic fibrosis. Very few cases have been encountered in routine day-to-day practice. The patients usually present with features of cholangitis such as pain abdomen and jaundice.

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Honeybee bites have been known to cause localized allergic reactions and anaphylaxis but systemic toxic reactions leading to multiorgan dysfunction is very rare. Serious complications like acute renal failure, acute myocardial infarction (Kounis syndrome) and even death have been reported as the complication of honeybee bite. Herein, we report a case of multiorgan dysfunction following honeybee bite, which was complicated with acute kidney injury, thrombocytopenia, bradycardia, keratitis, and deranged liver function along with localized allergic reaction and pain.

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Despite increasing complexity of contemporary procedures at tertiary care hospitals, the relationship between interventional cardiology fellows-in-training (ICFITs) and complications of percutaneous coronary intervention (PCI) has not been reported. We compiled logbooks of 6 ICFITs at an academic hospital and evaluated patient and procedural characteristics of PCIs performed with and without presence of an ICFIT. The primary end point was the composite of all in-hospital PCI complications defined by the American College of Cardiology's National Cardiovascular Data Registry: (1) catheterization laboratory events such as no-reflow and dissection/perforation, (2) general clinical events such as stroke or cardiogenic shock, (3) vascular and bleeding complications, and (4) miscellaneous complications such as peak troponin or creatinine levels.

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Aims: In addition to an adjunctive imaging platform during coronary angiography, intravascular ultrasound (IVUS) with Virtual Histology (VH) is increasingly being used to quantify coronary atherosclerosis. The relationship between VH-IVUS measures of coronary atherosclerosis and traditional cardiovascular risk factors has not been completely described. The objective of this study was to determine if an association exists between VH-IVUS measures of coronary atherosclerosis and the Framingham risk score in a prospective, multinational registry.

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Background: Bleeding in patients undergoing percutaneous coronary intervention (PCI) is associated with increased morbidity, mortality, length of hospitalization, and cost. We identified baseline clinical characteristics associated with bleeding complications after PCI and developed a simplified, clinically useful algorithm to predict patient risk.

Methods And Results: Data were analyzed from 302 152 PCI procedures performed at 440 US centers participating in the National Cardiovascular Data Registry.

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Objectives: Our purpose was to evaluate percutaneous coronary intervention (PCI) attempt rates in patients with class I indications for coronary artery bypass graft (CABG) surgery after the introduction of drug-eluting stents (DES).

Background: In patients with severe, multivessel coronary disease, CABG has historically been recommended over PCI. Practice guidelines for CABG were last updated before the emergence of data on DES efficacy.

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Orbital atherectomy represents a newly developed technology for the endovascular treatment of peripheral artery disease. There is currently limited data with regards to the safety and efficacy of this treatment. Herein, we describe a case where orbital atherectomy was utilized to treat a heavily calcified superficial femoral artery, and describe a previously unreported side effect of orbital atherectomy, hemolysis induced pancreatitis.

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The use of distal embolic protection devices (EPD) in saphenous vein graft percutaneous interventions (SVG-PCI) has been associated with a decrease in adverse events. Currently, there are limited data regarding the percentage of SVG lesions that are suitable for EPD deployment. We retrospectively reviewed 131 SVG-PCI procedures occurring over 18 months for suitability for EPD deployment, utilizing previously published suitability criteria.

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Objective: The purpose of this study was to determine whether an association exists between adiponectin and plaque composition in human coronary arteries.

Research Design And Methods: Adiponectin is an adipocyte-derived protein with antiatherogenic and insulin-sensitizing properties. To date, the relationship between adiponectin and plaque composition is unknown.

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We evaluated the efficacy and safety of elective percutaneous coronary intervention (PCI) at a hospital without onsite cardiac surgery. A growing number of hospitals without onsite cardiac surgery perform elective PCI. Few hospitals have reported outcomes, despite controversy surrounding this practice.

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In clinical trials, the use of a distal embolic protection device (EPD) during saphenous vein graft (SVG) percutaneous intervention (PCI) decreases the incidence of major adverse events. However, the frequency of EPD use during SVG PCI in clinical practice is unknown. We evaluated 19,546 SVG PCI procedures in the American College of Cardiology-National Cardiovascular Data Registry from January 1, 2004, through March 30, 2006.

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Evaluation of atherosclerotic plaque composition and morphometry may yield insight into plaque biology and the mechanisms of plaque-associated thrombosis. Analysis of intravascular ultrasound radiofrequency (IVUS-RF) backscatter signal is one technology that provides in vivo assessment of both atherosclerotic plaque composition and morphometry. We summarize three different approaches to IVUS-RF and critique the studies using this technology.

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To elucidate mechanisms by which left ventricular (LV) hypertrophy (LVH) increases the risk of atherosclerotic heart disease, we sought to determine whether LVH is independently associated with coronary artery calcium (CAC) and serum C-reactive protein (CRP) levels in the general population. The Dallas Heart Study is a population-based sample in which 2633 individuals underwent cardiac MRI to measure LV structure, electron beam CT to measure CAC, and measurement of plasma CRP. We used univariate and multivariable analyses to determine whether LV mass and markers of concentric LV hypertrophy or dilation were associated with CAC and CRP.

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The differentiation of left ventricular pseudoaneurysm from true aneurysm is sometimes difficult. Given the propensity for pseudoaneurysms to rupture leading to cardiac tamponade, shock, and death, compared with a more benign natural history for true aneurysms, accurate diagnosis of these conditions is clinically important. Clinical symptoms, physical examination findings, electrocardiograms, and routine x-rays are not sensitive or specific for diagnosing left ventricular aneurysms nor for distinguishing true from pseudoaneurysm once detected.

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Purpose Of Review: This review focuses on recent developments in three controversial areas of management of acute coronary syndromes.

Recent Findings: There are potential benefits of an early invasive treatment strategy (routine cardiac catheterization and revascularization when appropriate) in the elderly, who are at high risk for adverse outcomes and treatment-related complications following acute coronary syndromes. There are developments in the role of low-molecular-weight heparin agents in management of acute coronary syndromes in the modern treatment era, in which early coronary revascularization and use of other potent antiplatelet and antithrombin agents are common.

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Background: Despite their known benefits, beta-blockers (BBL) are not yet widely prescribed for heart failure, especially in the primary care setting. We wanted to identify patient characteristics that could guide primary care physicians in deciding whether they or a cardiologist should initiate BBL. A second objective was to determine the tolerability of BBL in clinical practice.

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African-American patients with heart failure treated at urban public hospitals are at high risk for adverse outcomes likely due to complex socioeconomic factors. While establishing a heart failure disease management program at Parkland Memorial Hospital in Dallas, TX, the authors completed two studies that address the high rates of heart failure hospitalizations seen in this population. The first study found high rates of adverse outcomes following emergency department discharge for heart failure.

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Article Synopsis
  • The transition from concentric left ventricular hypertrophy to heart failure is unclear, particularly in hypertensive African-American patients.
  • Out of 159 patients studied, 18% developed reduced ejection fraction after about 4 years.
  • Key risk factors for this progression included having coronary artery disease, pulmonary edema on chest x-ray, or experiencing a myocardial infarction.
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