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https://www.readbyqxmd.com/read/28526246/impaired-mitophagy-facilitates-mitochondrial-damage-in-danon-disease
#1
Sherin I Hashem, Anne N Murphy, Ajit S Divakaruni, Matthew L Klos, Bradley C Nelson, Emily C Gault, Teisha J Rowland, Cynthia N Perry, Yusu Gu, Nancy D Dalton, William H Bradford, Eric J Devaney, Kirk L Peterson, Kenneth L Jones, Matthew R G Taylor, Ju Chen, Neil C Chi, Eric D Adler
RATIONALE: Lysosomal associated membrane protein type-2 (LAMP-2) is a highly conserved, ubiquitous protein that is critical for autophagic flux. Loss of function mutations in the LAMP-2 gene cause Danon disease, a rare X-linked disorder characterized by developmental delay, skeletal muscle weakness, and severe cardiomyopathy. We previously found that human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) from Danon patients exhibited significant mitochondrial oxidative stress and apoptosis...
May 16, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28506913/predicting-determinants-of-atrial-fibrillation-or-flutter-for-therapy-elucidation-in-patients-at-risk-for-thromboembolic-events-predate-af-study
#2
Javed M Nasir, William Pomeroy, Adam Marler, Matthew Hann, Tina Baykaner, Ronald Jones, Richard Stoll, Katherine Hursey, Angela Meadows, Jennifer Walker, Steve Kindsvater
BACKGROUND: Atrial fibrillation (AF) is the most common clinically significant cardiac rhythm disorder. There is considerable interest in screening for AF, as it is a leading cause of stroke, and oral anticoagulants (OACs) have been shown to significantly reduce the risk of stroke in patients with AF. Improved screening for AF with subsequent treatment may help improve long-term outcomes, but the optimal patient population and screening intensity are unknown. OBJECTIVES: In this study, we prospectively evaluated the use of the CHA2DS2-VASc score for the prediction of new-onset AF using insertable cardiac monitors (ICMs) and examined whether this screening led to the initiation of OAC therapy...
May 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28468975/physiology-of-angina-and-its-alleviation-with-nitroglycerine-insights-from-invasive-catheter-laboratory-measurements-during-exercise
#3
Kaleab N Asrress, Rupert Williams, Timothy P Lockie, Muhammed Z Khawaja, Kalpa De Silva, Matthew Lumley, Tiffany Patterson, Satpal S Arri, Sana Ihsan, Howard Ellis, Antoine Guilcher, Brian R Clapp, Philip J Chowienczyk, Sven Plein, Divaka Perera, Michael Marber, Simon R Redwood
Background -The mechanisms governing exercise-induced angina and its alleviation by the most commonly used anti-anginal drug, nitroglycerine (GTN), are incompletely understood. The purpose of this study was to develop a method with which the effects of anti-anginal drugs could be evaluated invasively during physiological exercise to gain further understanding as to the clinical impact of angina and GTN. Methods -40 Patients (mean 65.2±7.6 years) with exertional angina and coronary artery disease underwent cardiac catheterisation via radial access and performed incremental exercise using a supine cycle ergometer...
May 3, 2017: Circulation
https://www.readbyqxmd.com/read/28393757/prehospital-randomised-assessment-of-a-mechanical-compression-device-in-out-of-hospital-cardiac-arrest-paramedic-a-pragmatic-cluster-randomised-trial-and-economic-evaluation
#4
Simon Gates, Ranjit Lall, Tom Quinn, Charles D Deakin, Matthew W Cooke, Jessica Horton, Sarah E Lamb, Anne-Marie Slowther, Malcolm Woollard, Andy Carson, Mike Smyth, Kate Wilson, Garry Parcell, Andrew Rosser, Richard Whitfield, Amanda Williams, Rebecca Jones, Helen Pocock, Nicola Brock, John Jm Black, John Wright, Kyee Han, Gary Shaw, Laura Blair, Joachim Marti, Claire Hulme, Christopher McCabe, Silviya Nikolova, Zenia Ferreira, Gavin D Perkins
BACKGROUND: Mechanical chest compression devices may help to maintain high-quality cardiopulmonary resuscitation (CPR), but little evidence exists for their effectiveness. We evaluated whether or not the introduction of Lund University Cardiopulmonary Assistance System-2 (LUCAS-2; Jolife AB, Lund, Sweden) mechanical CPR into front-line emergency response vehicles would improve survival from out-of-hospital cardiac arrest (OHCA). OBJECTIVE: Evaluation of the LUCAS-2 device as a routine ambulance service treatment for OHCA...
March 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28328397/age-dependent-diastolic-heart-failure-in-an-in-vivo-drosophila-model
#5
Matthew P Klassen, Christian J Peters, Shiwei Zhou, Hannah H Williams, Lily Yeh Jan, Yuh Nung Jan
While the signals and complexes that coordinate the heartbeat are well established, how the heart maintains its electromechanical rhythm over a lifetime remains an open question with significant implications to human health. Reasoning that this homeostatic challenge confronts all pulsatile organs, we developed a high resolution imaging and analysis toolset for measuring cardiac function in intact, unanesthetized Drosophila melanogaster. We demonstrate that, as in humans, normal aging primarily manifests as defects in relaxation (diastole) while preserving contractile performance...
March 22, 2017: ELife
https://www.readbyqxmd.com/read/28246236/serial-measurement-of-high-sensitivity-troponin-i-and-cardiovascular-outcomes-in-patients-with-type-2-diabetes-mellitus-in-the-examine-trial
#6
Matthew A Cavender, William B White, Petr Jarolim, George L Bakris, William C Cushman, Stuart Kupfer, Qi Gao, Cyrus R Mehta, Faiez Zannad, Christopher P Cannon, David A Morrow
Background -We sought to describe the relationship between changes in high-sensitivity cardiac troponin I (hsTnI) and cardiovascular (CV) outcomes. Methods -The Examination of Cardiovascular Outcomes with Alogliptin versus Standard of Care (EXAMINE) was a phase IIIb clinical outcomes trial designed to evaluate the CV safety of alogliptin, a non-selective dipeptidyl peptidase 4 (DPP-4) inhibitor. Patients with type 2 diabetes mellitus (T2DM), glycated hemoglobin between 6.5%-11% (or 7%-11% if they were on insulin), and a recent acute coronary syndrome (between 15-90 days prior to randomization) were eligible for the trial...
February 28, 2017: Circulation
https://www.readbyqxmd.com/read/28246139/emergency-medical-services-responders-perceptions-of-the-effect-of-stress-and-anxiety-on-patient-safety-in-the-out-of-hospital-emergency-care-of-children-a-qualitative-study
#7
Jeanne-Marie Guise, Matthew Hansen, Kerth O'Brien, Caitlin Dickinson, Garth Meckler, Phil Engle, William Lambert, Jonathan Jui
OBJECTIVE: Prehospital emergency medical services (EMS) providers report anxiety as the second most common contributor to paediatric patient safety events. The objective of this study was to understand how EMS providers perceive the effect of stress and anxiety on paediatric out-of-hospital patient safety. SETTING: This was a nationwide study of EMS providers from 44 of 50 (88%) US states. PARTICIPANTS: A total of 753 eligible EMS professionals, including emergency medical technicians, emergency department physicians and nurses (general and paediatric), and respiratory therapists who participate in out-of-hospital transports...
February 28, 2017: BMJ Open
https://www.readbyqxmd.com/read/28224933/inadequacy-of-existing-clinical-prediction-models-for-predicting-mortality-after-transcatheter-aortic-valve-implantation
#8
Glen P Martin, Matthew Sperrin, Peter F Ludman, Mark A de Belder, Chris P Gale, William D Toff, Neil E Moat, Uday Trivedi, Iain Buchan, Mamas A Mamas
BACKGROUND: The performance of emerging transcatheter aortic valve implantation (TAVI) clinical prediction models (CPMs) in national TAVI cohorts distinct from those where they have been derived is unknown. This study aimed to investigate the performance of the German Aortic Valve, FRANCE-2, OBSERVANT and American College of Cardiology (ACC) TAVI CPMs compared with the performance of historic cardiac CPMs such as the EuroSCORE and STS-PROM, in a large national TAVI registry. METHODS: The calibration and discrimination of each CPM were analyzed in 6676 patients from the UK TAVI registry, as a whole cohort and across several subgroups...
February 2017: American Heart Journal
https://www.readbyqxmd.com/read/28196898/increased-radial-access-is-not-associated-with-worse-femoral-outcomes-for-percutaneous-coronary-intervention-in-the-united-kingdom
#9
William Hulme, Matthew Sperrin, Evangelos Kontopantelis, Karim Ratib, Peter Ludman, Alex Sirker, Tim Kinnaird, Nick Curzen, Chun Shing Kwok, Mark De Belder, James Nolan, Mamas A Mamas
BACKGROUND: The radial artery is increasingly adopted as the primary access site for cardiac catheterization because of patient preference, lower bleeding rates, cost effectiveness, and reduced risk of mortality in high-risk patient groups. Concerns have been expressed that operators/centers have become increasingly unfamiliar with transfemoral access. The aim of this study was to assess whether a change in access site practice toward transradial access nationally has led to worse outcomes in percutaneous coronary intervention procedures performed through the transfemoral access approach...
February 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28185360/effect-of-environmental-impedance-surrounding-a-radiofrequency-ablation-catheter-electrode-on-lesion-characteristics
#10
Duy T Nguyen, Kianna Nguyen, Lijun Zheng, Joseph Schuller, Matthew Zipse, Wendy S Tzou, William H Sauer
INTRODUCTION: The electrical conductivity of the environment surrounding a catheter electrode may affect radiofrequency (RF) current. A higher impedance environment enveloping a catheter tip can be insulating and thus direct RF preferentially into targeted cardiac tissue. We sought to evaluate whether different environmental impedances will affect RF lesions. METHODS: An ex vivo model using bovine myocardium, load cell, and 4 mm ablation catheter was tested using a circulating bath of normal (0...
February 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28119465/phosphorylation-of-ser1928-mediates-the-enhanced-activity-of-the-l-type-ca2-channel-cav1-2-by-the-%C3%AE-2-adrenergic-receptor-in-neurons
#11
Hai Qian, Tommaso Patriarchi, Jennifer L Price, Lucas Matt, Boram Lee, Madeline Nieves-Cintrón, Olivia R Buonarati, Dhrubajyoti Chowdhury, Evanthia Nanou, Matthew A Nystoriak, William A Catterall, Montatip Poomvanicha, Franz Hofmann, Manuel F Navedo, Johannes W Hell
The L-type Ca(2+) channel Cav1.2 controls multiple functions throughout the body including heart rate and neuronal excitability. It is a key mediator of fight-or-flight stress responses triggered by a signaling pathway involving β-adrenergic receptors (βARs), cyclic adenosine monophosphate (cAMP), and protein kinase A (PKA). PKA readily phosphorylates Ser(1928) in Cav1.2 in vitro and in vivo, including in rodents and humans. However, S1928A knock-in (KI) mice have normal PKA-mediated L-type channel regulation in the heart, indicating that Ser(1928) is not required for regulation of cardiac Cav1...
January 24, 2017: Science Signaling
https://www.readbyqxmd.com/read/28052152/types-of-myocardial-infarction-among-human-immunodeficiency-virus-infected-individuals-in-the-united-states
#12
Heidi M Crane, Pathmaja Paramsothy, Daniel R Drozd, Robin M Nance, J A Chris Delaney, Susan R Heckbert, Matthew J Budoff, Greer A Burkholder, James H Willig, Michael J Mugavero, William C Mathews, Paul K Crane, Richard D Moore, Joseph J Eron, Sonia Napravnik, Peter W Hunt, Elvin Geng, Priscilla Hsue, Carla Rodriguez, Inga Peter, Greg S Barnes, Justin McReynolds, William B Lober, Kristina Crothers, Matthew J Feinstein, Carl Grunfeld, Michael S Saag, Mari M Kitahata
Importance: The Second Universal Definition of Myocardial Infarction (MI) divides MIs into different types. Type 1 MIs result spontaneously from instability of atherosclerotic plaque, whereas type 2 MIs occur in the setting of a mismatch between oxygen demand and supply, as with severe hypotension. Type 2 MIs are uncommon in the general population, but their frequency in human immunodeficiency virus (HIV)-infected individuals is unknown. Objectives: To characterize MIs, including type; identify causes of type 2 MIs; and compare demographic and clinical characteristics among HIV-infected individuals with type 1 vs type 2 MIs...
March 1, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28043466/increasing-complexity-of-heart-transplantation-in-patients-with-congenital-heart-disease
#13
William Y Shi, Pankaj Saxena, Matthew S Yong, Silvana F Marasco, David C McGiffin, Anne Shipp, Robert G Weintraub, Yves d'Udekem, Christian P Brizard, Igor E Konstantinov
Owing to improved surgical results, there is a growing population of patients with repaired congenital heart disease (CHD) requiring heart transplantation. The objective of the study was to review our experience in these patients. A retrospective review of the outcomes of heart transplantation in patients with CHD (n = 77) between 1988 and 2014 was performed. Outcomes of early (1988-1999) and late (2000-2014) eras were compared. In results, the mean age was 18 ± 14 years (range: 16 days-58 years). Seventy (91%) patients underwent a mean of 2...
July 2016: Seminars in Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28039604/socioeconomic-and-racial-disparities-a-case-control-study-of-patients-receiving-transcatheter-aortic-valve-replacement-for-severe-aortic-stenosis
#14
Anna Sleder, Shiloh Tackett, Matthew Cerasale, Chetan Mittal, Iyad Isseh, Ryhm Radjef, Andrew Taylor, Rashad Farha, Oleksandra Lupak, Dana Larkin, Lois Lamerato, George Divine, Kimberlydawn Wisdom, Kimberly Baker-Genaw, William O'Neill
BACKGROUND: We sought to quantify socioeconomic disparities in patients with severe aortic stenosis (AS) undergoing transcatheter aortic valve replacement (TAVR) at an urban, tertiary referral center. METHODS: This retrospective case-control study identified 67 patients with severe AS (aortic valve [AV] area ≤1 cm(2) or AV area index ≤0.60 cm(2)/m(2) or AV velocity ≥40 mmHg) who underwent TAVR from November 5, 2013 to June 10, 2014. Study subjects were matched to controls with severe AS without TAVR in a 4:1 age-frequency match...
December 30, 2016: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/28025066/executive-summary-trends-in-u-s-cardiovascular-care-2016-report-from-4-acc-national-cardiovascular-data-registries
#15
Frederick A Masoudi, Angelo Ponirakis, James A de Lemos, James G Jollis, Mark Kremers, John C Messenger, John W M Moore, Issam Moussa, William J Oetgen, Paul D Varosy, Robert N Vincent, Jessica Wei, Jeptha P Curtis, Matthew T Roe, John A Spertus
The National Cardiovascular Data Registries (NCDR) of the American College of Cardiology consists of ten national programs designed to measure quality of care for high impact cardiovascular conditions and procedures. The NCDR provides feedback with benchmarking of a broad range of quality metrics to participants; supports quality improvement interventions at the local and national level; and serves as the basis for cardiovascular health services and epidemiology research that informs contemporary clinical care...
December 20, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28025065/trends-in-u-s-cardiovascular-care-2016-report-from-4-acc-national-cardiovascular-data-registries
#16
REVIEW
Frederick A Masoudi, Angelo Ponirakis, James A de Lemos, James G Jollis, Mark Kremers, John C Messenger, John W M Moore, Issam Moussa, William J Oetgen, Paul D Varosy, Robert N Vincent, Jessica Wei, Jeptha P Curtis, Matthew T Roe, John A Spertus
Cardiovascular disease (CVD) is a leading cause of death and disability in the United States. National quality programs such as the National Cardiovascular Data Registry (NCDR®) permit assessments of the quality of care and outcomes for broad populations of patients with CVD. This report provides data from 2014 from four NCDR® hospital quality programs: 1) CathPCI® for coronary angiography and percutaneous coronary intervention (667,424 procedures performed in 1,612 hospitals) ICD™ for implantable cardioverter defibrillators (158,649 procedures performed in 1,715 hospitals); 3) ACTION®-GWTG™ for acute coronary syndromes (182,903 patients admitted to 907 hospitals); and 4) IMPACT® for cardiac catheterization and intervention for pediatric and adult congenital heart disease (20,169 procedures in 76 hospitals)...
December 20, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28000961/adiabatic-excitation-for-31-p-mr-spectroscopy-in-the-human-heart-at-7-t-a-feasibility-study
#17
Ladislav Valkovič, William T Clarke, Lucian A B Purvis, Benoit Schaller, Matthew D Robson, Christopher T Rodgers
PURPOSE: Phosphorus magnetic resonance spectroscopy ((31) P-MRS) provides a unique tool for assessing cardiac energy metabolism, often quantified using the phosphocreatine (PCr)/adenosine triphosphate (ATP) ratio. Surface coils are typically used for excitation for (31) P-MRS, but they create an inhomogeneous excitation field across the myocardium, producing undesirable, spatially varying partial saturation. Therefore, we implemented adiabatic excitation in a 3D chemical shift imaging (CSI) sequence for cardiac (31) P-MRS at 7 Tesla (T)...
December 21, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27990700/biomass-fuel-smoke-exposure-was-associated-with-adverse-cardiac-remodeling-and-left-ventricular-dysfunction-in-peru
#18
M S Burroughs Peña, E J Velazquez, J D Rivera, F Alenezi, C Wong, M Grigsby, V G Davila-Roman, R H Gilman, J J Miranda, W Checkley
While household air pollution from biomass fuel combustion has been linked to cardiovascular disease, the effects on cardiac structure and function have not been well described. We sought to determine the association between biomass fuel smoke exposure and cardiac structure and function by transthoracic echocardiography. We identified a random sample of urban and rural residents living in the high-altitude region of Puno, Peru. Daily biomass fuel use was self-reported. Participants underwent transthoracic echocardiography...
December 19, 2016: Indoor Air
https://www.readbyqxmd.com/read/27926646/treatment-of-a-pregnant-patient-in-a-persistent-vegetative-state
#19
Matthew P Romagano, William E Scorza, Stephen E Lammers, Carole Dorr, John C Smulian
BACKGROUND: Brain injury leading to a persistent vegetative state during pregnancy involves difficult medical and ethical decisions. CASE: A 21-year-old multigravid woman entered a persistent vegetative state at 20 1/7 weeks of gestation after cardiac arrest with postanoxic brain injury from a suspected drug overdose. The clinical disciplines responsible for her case formed a collaborative care plan involving ventilator, nutrition, and medication support of the mother and regular fetal monitoring and ultrasound testing...
January 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27904163/the-impact-of-direct-cardiac-output-determination-on-using-a-widely-available-direct-continuous-oxygen-consumption-measuring-device-on-the-hemodynamic-assessment-of-aortic-valve
#20
Zaher Fanari, Matthew Grove, Anitha Rajamanickam, Sumaya Hammami, Cassie Walls, Paul Kolm, Mitchell Saltzberg, William S Weintraub, Andrew J Doorey
BACKGROUND: Accurate assessment of cardiac output (CO) is essential for the hemodynamic assessment of aortic valve area (AVA). Estimation of oxygen consumption (VO2) and Thermodilution (TD) is employed in many cardiac catheterization laboratories (CCL) given the historically cumbersome nature of direct continuous VO2 measurement, the "gold standard" for this technique. A portable facemask device simplifies the direct continuous measurement of VO2, allowing for relatively rapid and continuous assessment of CO and AVA...
September 2016: Delaware Medical Journal
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