Publications by authors named "Marc Silver"

Aims: Quantitative methods have shown clinically significant heterogeneity in blood volume (BV) profiles across heart failure (HF) phenotypes. These profiles extend from hypovolaemia to normal BV and to variable degrees of BV hypervolaemia, frequently with similar clinical presentations. However, a comprehensive survey of BV profiles providing practical clinical guidance for the interpretation and management of quantitative plasma volume (PV) and red blood cell (RBC) mass findings has not been reported.

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Background: This review delves into the intricate landscape of cardiorenal syndrome (CRS) and highlights the pivotal role of blood volume analysis (BVA) in improving patient care and outcomes.

Summary: BVA offers a direct and highly accurate quantification of intravascular volume, red blood cell volume, and plasma volume, complete with patient-specific norms. This diagnostic tool enhances the precision of diuretic and red cell therapies, significantly elevating the effectiveness of conventional care.

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Article Synopsis
  • A meta-analysis was conducted to evaluate the benefits of different exercise types for breast cancer patients, focusing on fitness and quality of life outcomes.
  • The analysis included 31 randomized controlled trials, revealing that exercise significantly improved cardiorespiratory fitness and physical function, while showing no significant improvements in muscle strength and fatigue.
  • Notably, exercise was found to enhance health-related quality of life for patients, indicating potential positive effects on their overall well-being.
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Blood volume analysis provides a quantitative volume assessment in patients with equivocal or discordant clinical findings. Reports on its use in mechanical circulatory support are limited and it has never been described in patients with a total artificial heart. Our series demonstrates that patients supported with total artificial heart as a bridge to transplant have significant reductions in red blood cell volume and heterogeneous adaptations in their total blood volume and plasma volume.

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The prognostic implications of intravascular volume status assessed by blood volume analysis (BVA) in ambulatory heart failure (HF) remain uncertain. The incremental benefits of assessing volume status, beyond the well-established filling pressures, in predicting HF outcomes are unknown.

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Among patients with chronic heart failure (HF) intravascular volume profiles vary significantly despite similar clinical compensation. However, little is known regarding changes in blood volume (BV) profiles over time. The objective of this analysis was to identify the extent and character of changes in volume profiles over time.

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Studies have shown poor correlation between intra-cardiac pressures and blood volume (BV) measurements including HF. The impact of sex and left ventricular ejection fraction (LVEF) on this relationship has not been studied. We obtained pressure (pulmonary artery diastolic pressure (PADP)) and volume (total blood volume (TBV) and estimated stress blood volume (eSBV)) measurements from HF patients at the time of CardioMEMS implantation.

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Background: In the WRAP-IT trial (Worldwide Randomized Antibiotic Envelope Infection Prevention), adjunctive use of an absorbable antibacterial envelope resulted in a 40% reduction of major cardiac implantable electronic device infection without increased risk of complication in 6983 patients undergoing cardiac implantable electronic device revision, replacement, upgrade, or initial cardiac resynchronization therapy defibrillator implant. There is limited information on the cost-effectiveness of this strategy. As a prespecified objective, we evaluated antibacterial envelope cost-effectiveness compared with standard-of-care infection prevention strategies in the US healthcare system.

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To review and analyze the clinical outcomes of thermal therapy (≤1.4°C increase in core body temperature) in patients with heart failure (HF). A systematic review and meta-analysis regarding the effects of thermal therapy on HF was done by searching PubMed, Ovid Medline, Ovid Embase, Scopus, and internal databases up to date (2019).

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  • Antitachycardia pacing (ATP) is used to end dangerous heart rhythms, but there’s little guidance on how to best program it for effectiveness.
  • * This study assessed if more ATP sequences result in fewer shocks from implantable cardioverter-defibrillators (ICDs) in patients experiencing ventricular tachyarrhythmias (VTs).
  • * Results showed that patients programmed with more ATP sequences had a significant reduction in shocked VT and fast ventricular tachycardia (FVT) episodes, suggesting that increased ATP programming improves patient outcomes.*
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Background: Infections after placement of cardiac implantable electronic devices (CIEDs) are associated with substantial morbidity and mortality. There is limited evidence on prophylactic strategies, other than the use of preoperative antibiotics, to prevent such infections.

Methods: We conducted a randomized, controlled clinical trial to assess the safety and efficacy of an absorbable, antibiotic-eluting envelope in reducing the incidence of infection associated with CIED implantations.

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Importance: Heart failure (HF) is the leading cause of hospitalization among patients over the age of 65 in the United States and developed countries, posing a significant economic burden to the health care systems. More than half of the patients with HF will be readmitted to the hospital within 6 months from discharge, leading not only to increased health care related expenses but also functional decline, iatrogenic injuries and in-hospital infections. With the increasing prevalence of HF, there is a substantial need for innovative delivery care models that can provide hospital level of care at a patient's home.

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  • Transthyretin amyloidosis (ATTR) is a complex disorder affecting multiple organs, with both genetic and non-genetic causes; this study aimed to describe its characteristics in the U.S. using data from the THAOS registry.
  • Analysis revealed that U.S. patients are generally older (average age of 70) and predominantly male (85.4%), with a notable incidence of the Val122Ile mutation and a greater prevalence of wild-type disease compared to patients in other regions.
  • Patients with the Val122Ile mutation showed a higher burden of neurological symptoms and worse quality of life, while survival analysis indicated that advancing age and lower mean arterial pressure are key factors linked to increased mortality, rather than specific
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Heart failure (HF) affects millions of Americans and causes financial burdens because of the need for rehospitalization. For this reason, health care systems and patients alike are seeking methods to decrease readmissions. We assessed the potential for reducing readmissions of patients with postacute care HF through an educational program combined with enhanced external counterpulsation (EECP).

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Despite tremendous focus, effort, drug and device development and resources dedicated to the care of patients at risk for and with heart failure (HF), the epidemic continues. The HF patient presents with a widely deranged physiology and typically at the same time is malnourished adding to the disease complexity and therapeutic challenges. Most nutritional approaches for patients with HF focus on dietary restrictions (of salt and water) and lack uniformity or clarity or focus on meeting nutritional needs, barriers and deficits of the patient with HF.

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Hyperkalemia is defined as serum potassium concentrations elevated above the upper limit of normal (> 5.0 mEq/L). It has become more common in cardiovascular practice due to the growing population of patients with chronic kidney disease and the broad application of drugs that modulate renal elimination of potassium by reducing production of angiotensin II (angiotensin-converting enzyme inhibitors, direct renin inhibitors, β-adrenergic receptor antagonists), blocking angiotensin II receptors (angiotensin receptor blockers), or antagonizing the action of aldosterone on mineralocorticoid receptors (mineralocorticoid receptor antagonists).

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Endothelial dysfunction has been recognized as a pathophysiologic mechanism in the progression of heart failure (HF). However, little attention has been given to the ability of dietary approaches to improve endothelial function. This study examined the effects of the Dietary Approaches to Stop Hypertension (DASH) diet on endothelial function, exercise capacity, and quality of life in patients with chronic symptomatic (stage C) HF.

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Background: Implantable cardioverter-defibrillator (ICD) shocks are associated with increased anxiety, health care utilization, and potentially mortality.

Objective: The purpose of the Shock-Less Study was to determine if providing feedback reports to physicians on their adherence to evidence-based shock reduction programming could improve their programming behavior and reduce shocks.

Methods: Shock-Less enrolled primary prevention (PP) and secondary prevention (SP) ICD patients between 2009 and 2012 at 118 study centers worldwide and followed patients longitudinally after their ICD implant.

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Background: Over a 12-month period, adolescent heart-screening programs were performed for identifying at-risk adolescents for sudden cardiac death (SCD) in our community. Novel to our study, all adolescents received an abbreviated, ultraportable echocardiography (UPE). In this report, we describe the use of UPE in this screening program.

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The ACR and the American College of Cardiology Foundation (ACCF) developed a joint process for determining the appropriate utilization (AU) of cardiovascular imaging modalities in heart failure (HF). This report represents an executive summary of the AU document which was aimed at critically and systematically creating, reviewing, and categorizing clinical situations where physicians order or use imaging tests for patients with suspected, incompletely characterized, or known HF.

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