167 results match your criteria: "Johns Hopkins University Baltimore MD.[Affiliation]"

Background: Cardiometabolic comorbidities such as obesity, diabetes, and hypertension are highly prevalent in heart failure (HF). We aimed to examine the association between severity of cardiometabolic comorbidities and hospitalization in patients with HF.

Methods: In a retrospective electronic health record-based cohort of adults 18 with HF, we categorized individuals based on the number of severe cardiometabolic comorbidities, including hypertension, diabetes, and obesity.

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Background: Hypertrophic cardiomyopathy (HCM) is a common heritable heart disease where the most frequently associated mutations occur in the myosin-binding protein C () sarcomere-associated gene. HCM is also a common veterinary clinical problem in certain cat breeds such as Maine Coons and Ragdolls, also most associated with mutations in . Mouse models of HCM in which mutations are introduced recapitulate some, but not all, features of human HCM.

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Extensive Secondary Cratering From the InSight Sol 1034a Impact Event.

J Geophys Res Planets

December 2024

Institut für Geophysik, ETH Zurich Zurich Switzerland.

Impact cratering is one of the fundamental processes throughout the history of the Solar System. The formation of new impact craters on planetary bodies has been observed with repeat images from orbiting satellites. However, the time gap between images is often large enough to preclude detailed analysis of smaller-scale features such as secondary impact craters, which are often removed or buried over a short time period.

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In the last three decades, ablation of atrial fibrillation (AF) has become an evidence-based safe and efficacious treatment for managing the most common cardiac arrhythmia. In 2007, the first joint expert consensus document was issued, guiding healthcare professionals involved in catheter or surgical AF ablation. Mounting research evidence and technological advances have resulted in a rapidly changing landscape in the field of catheter and surgical AF ablation, thus stressing the need for regularly updated versions of this partnership which were issued in 2012 and 2017.

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Assessment of Inflammatory Biomarkers and Incident Atrial Fibrillation in Older Adults.

J Am Heart Assoc

December 2024

Cardiology Section San Francisco Veterans Affairs Health Care System San Francisco CA USA.

Background: Available evidence supports the importance of inflammation in atrial fibrillation (AF) pathogenesis, yet general anti-inflammatory therapies have failed to show benefit for prevention of the arrhythmia. Better understanding of the specific inflammatory pathways involved is necessary to advance therapeutics.

Methods And Results: We evaluated 9 circulating markers of inflammation measured by immunoassays and incidence of AF in a population-based older cohort.

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Background: Cigarette smoking has been associated with incident heart failure (HF). However, the association between cigarette smoking and smoking cessation with HF subtypes has not been well elucidated, particularly among Black people.

Methods And Results: We investigated 4189 (never smoker n=2934, former smoker n=761, current smoker n=464) Black participants (mean age 54 years, 64% women) without a history of HF or coronary heart disease at baseline in the Jackson Heart Study.

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Dendritic cell activation by iron oxide nanoparticles depends on the extracellular environment.

Nanoscale Adv

December 2024

Department of Radiation Oncology and Molecular Radiation Sciences, School of Medicine, Johns Hopkins University 1550 Orleans Street, Cancer Research Building - II, Rm 416 Baltimore MD 21231 USA

Nanoparticles can exert immune modulating effects in a host depending on composition, mode of administration, and type of disease. Although the specific mechanisms of nanoparticle-induced immune responses remain unclear, their uptake by macrophages and other phagocytic innate immune cells is considered to be a key event. Our objective here was to ascertain if nanoparticle-mediated activation of dendritic cells (DCs) occurs or when exposed to hydroxyethyl starch-coated iron oxide nanoparticles.

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Article Synopsis
  • Prepregnancy diabetes and obesity are significant risk factors for hypertensive disorders of pregnancy (HDPs), with 7% of birthing individuals in a study experiencing HDP.
  • Among different racial and ethnic groups, HDP was most prevalent in American Indian and Alaska Native individuals, while diabetes and obesity showed the strongest associations with HDPs in Native Hawaiian and Other Pacific Islander and Asian individuals, respectively.
  • The study found that diabetes and obesity account for notable population attributable fractions of HDPs, emphasizing the need for targeted interventions, especially among vulnerable populations such as Native Hawaiian and Other Pacific Islander individuals.
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Background: Inflammation is a feature of coronary heart disease (CHD), but the role of proinflammatory microbial infection in CHD remains understudied.

Methods And Results: CHD was defined in the MESA (Multi-Ethnic Study of Atherosclerosis) as myocardial infarction (251 participants), resuscitated arrest (2 participants), and CHD death (80 participants). We analyzed sequencing reads from 4421 MESA participants in the National Heart, Lung, and Blood Institute Trans-Omics for Precision Medicine program using the PathSeq workflow of the Genome Analysis Tool Kit and a 65-gigabase microbial reference.

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Background: Prior studies have shown that cardiovascular disease (CVD) can be effectively managed through telehealth. However, there are little national data on the use of telehealth in people with CVD or CVD risk factors. We aimed to determine the prevalence of telehealth visits and visit modality (video versus audio-only) in people with CVD and CVD risk factors.

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Background: Cardiovascular disease (CVD) and cancer frequently co-occur due to shared risk factors such as obesity, which is linked to CVD and 14 cancer types. This study explores whether CVD pathophysiologies, combined with obesity, increase cancer risk, impacting clinical management.

Methods And Results: Data from the ARIC (Atherosclerosis Risk in Communities) study, spanning 28 years, were analyzed.

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Background: Consumption of ultra-processed food, which is manufactured food that is high in additives and sparse in intact foods, is adversely associated with cardiovascular health, primarily in non-US study populations. We aimed to estimate the association between ultra-processed food consumption and incident hypertension in middle-aged adults in the United States.

Methods And Results: We included 8923 ARIC (Atherosclerosis Risk in Communities) study participants who were hypertension free at baseline and had complete dietary, covariate, and hypertension data from visit 1 (1987-1989).

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Article Synopsis
  • Acute ischemic stroke (AIS) patients' collateral status (CS) is a crucial factor in predicting favorable outcomes, with relative cerebral blood flow (rCBF) being a key measurement for evaluating CS.
  • A study analyzing 221 AIS patients found that factors like male gender, chronic kidney disease, higher stroke severity (NIH Stroke Scale score ≥12), and low systolic blood pressure (<140) are linked to poor collateral status (rCBF <38%).
  • The findings emphasize the importance of these baseline characteristics and lab values in determining the severity of collateral blood flow and potential patient outcomes in AIS due to large vessel occlusion.
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3D-printed electrochemical cells for multi-point aptamer-based drug measurements.

Sens Diagn

September 2024

Biochemistry, Cellular and Molecular Biology Program, Johns Hopkins University School of Medicine 316 Hunterian Building, 725 North Wolfe Street Baltimore MD 21205 USA +1 443 287 4798.

Electrochemical aptamer-based (E-AB) sensors achieve detection and quantitation of biomedically relevant targets such as small molecule drugs and protein biomarkers in biological samples. E-ABs are usually fabricated on commercially available macroelectrodes which, although functional for rapid sensor prototyping, can be costly and are not compatible with the microliter sample volumes typically available in biorepositories for clinical validation studies. Seeking to develop a multi-point sensing platform for sensor validation in sample volumes characteristic of clinical studies, we report a protocol for in-house assembly of 3D-printed E-ABs.

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Self-assembled monolayers (SAMs) are employed in electrochemical biosensors to passivate and functionalize electrode surfaces. These monolayers prevent the occurrence of undesired electrochemical reactions and act as scaffolds for coupling bioaffinity reagents. Thiols are the most common adlayer used for this application; however, the thiol-gold bond is susceptible to competitive displacement by naturally occurring solvated thiols in biological fluids, as well as to desorption under continuous voltage interrogation.

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The Open Databases Integration for Materials Design (OPTIMADE) application programming interface (API) empowers users with holistic access to a growing federation of databases, enhancing the accessibility and discoverability of materials and chemical data. Since the first release of the OPTIMADE specification (v1.0), the API has undergone significant development, leading to the v1.

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Article Synopsis
  • A study assessed the real-world effectiveness of mavacamten for treating obstructive hypertrophic cardiomyopathy in a diverse patient population at Johns Hopkins HCM center, involving 66 patients.
  • Over a median treatment duration of 9 months, 72% of patients experienced improved heart failure symptoms and significant reduction in left ventricular outflow tract obstruction after 6 months of treatment.
  • The medication had no severe adverse events but was less effective in patients with a BMI of 35 kg/m² or higher; effectiveness and safety were consistent across racial groups.
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Background: Social determinants of health (SDoH) are associated with cardiovascular risk factors and outcomes; however, they are absent from risk prediction models. We aimed to assess if the addition of SDoH improves the predictive ability of the MESA (Multi-Ethnic Study of Atherosclerosis) Risk Score.

Methods And Results: This was a community-based prospective population cohort study that enrolled 6286 men and women, ages 45-84 years, who were free of clinical coronary heart disease (CHD) at baseline.

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Background: Outcomes from cardiopulmonary resuscitation (CPR) following sudden cardiac arrest are suboptimal. Postresuscitation targeted temperature management has been shown to have benefit in subjects with sudden cardiac arrest due to ventricular fibrillation, but there are few data for outcomes from sudden cardiac arrest due to pulseless electrical activity. In addition, intra-CPR cooling is more effective than postresuscitation cooling.

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Article Synopsis
  • Physician transfer can be a faster alternative to patient transfer for performing mechanical thrombectomy in acute ischemic stroke patients, leading to quicker treatment.
  • A systematic review of 12 studies (involving 1,894 patients) showed that physician transfer significantly reduced the time from stroke onset to recanalization by approximately 62 minutes and increased the chances of functional independence after 90 days.
  • However, physician transfer did not show a significant increase in the odds of achieving complete or near-complete recanalization compared to patient transfer.
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Background: Coronary artery calcium testing using noncontrast cardiac computed tomography is a guideline-indicated test to help refine eligibility for aspirin in primary prevention. However, access to cardiac computed tomography remains limited, with carotid ultrasound used much more often internationally. We sought to update the role of aspirin allocation in primary prevention as a function of subclinical carotid atherosclerosis.

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Background: The mortality risk attributable to moderate aortic stenosis (AS) remains incompletely characterized and has historically been underestimated. We aim to evaluate the association between moderate AS and all-cause death, comparing it with no/mild AS (in a general referral population and in patients with heart failure with reduced ejection fraction).

Methods And Results: A systematic review and pooled meta-analysis of Kaplan-Meier-derived reconstructed time-to-event data of studies published by June 2023 was conducted to evaluate survival outcomes among patients with moderate AS in comparison with individuals with no/mild AS.

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