keyword
MENU ▼
Read by QxMD icon Read
search

physiology of heart failure

keyword
https://www.readbyqxmd.com/read/27932871/efficacy-and-safety-outcomes-of-fractional-flow-reserve-in-guiding-clinical-therapy-of-non-st-segment-elevation-myocardial-infarction-compared-with-angiography-alone-in-elderly-chinese-patients
#1
Zhao Zhang, Ke Li, Jinwen Tian
OBJECTIVE: Fractional flow reserve (FFR) is an innovative method for evaluating the physiological significance of a coronary stenosis, but its validity is less certain in patients with non-ST-segment elevation myocardial infarction (NSTEMI). It is important to assess whether FFR is effective and safe in patients, especially elderly Chinese patients, with NSTEMI. As the first one in China, the purpose of this study was to establish the efficacy and safety outcomes of FFR in guiding clinical therapy of NSTEMI compared with angiography alone in elderly Chinese patients...
2016: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/27923792/the-fate-of-sulfate-in-chronic-heart-failure
#2
Anne Maria Koning, Wouter Meijers, Isidor Minović, Adrian Post, Martin Feelisch, Andreas Pasch, Henri Gd Leuvenink, Rudolf A de Boer, Stephan Jl Bakker, Harry van Goor
New leads to advance our understanding of heart failure (HF) pathophysiology are urgently needed. Previous studies have linked urinary sulfate excretion to a favourable cardiovascular risk profile. Sulfate is not only the end-product of hydrogen sulfide metabolism, but is also directly involved in various (patho)physiological processes, provoking scientific interest in its renal handling. This study investigates sulfate clearance in chronic HF (CHF) patients and healthy individuals and considers its relationship with disease outcome...
December 6, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27920838/successful-resynchronization-by-permanent-his-bundle-pacing-in-a-patient-with-pacing-induced-cardiomyopathy
#3
Yoji Iida, Tomoaki Izawa, Chikara Kobari, Toru Yatsuhashi, Nobuyuki Makishima
Right ventricular (RV) pacing has been reported to result in ventricular dyssynchrony, heart failure, and increased mortality. Pacing associated deterioration of left ventricular (LV) systolic function has been termed pacing-induced cardiomyopathy (PICM). While upgrading to biventricular pacing (BiVP) is an effective therapy for PICM, permanent His-bundle pacing (HBP) can be a physiological alternative to BiVP. We present a patient with PICM who responded dramatically to permanent HBP.
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27911394/confirmation-of-myocardial-ischemia-and-reperfusion-injury-in-mice-using-surface-pad-electrocardiography
#4
Stephanie L C Scofield, Krishna Singh
Many animal models have been established for the study of myocardial remodeling and heart failure due to its status as the number one cause of mortality worldwide. In humans, a pathologic occlusion forms in a coronary artery and reperfusion of that occluded artery is considered essential to maintain viability of the myocardium at risk. Although essential for myocardial recovery, reperfusion of the ischemic myocardium creates its own tissue injury. The physiologic response and healing of an ischemia/reperfusion injury is different from a chronic occlusion injury...
November 24, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27904993/molecular-mechanisms-of-heart-failure-insights-from-drosophila
#5
Shasha Zhu, Zhe Han, Yan Luo, Yulin Chen, Qun Zeng, Xiushan Wu, Wuzhou Yuan
Heart failure places an enormous burden on health and economic systems worldwide. It is a complex disease that is profoundly influenced by both genetic and environmental factors. Neither the molecular mechanisms underlying heart failure nor effective prevention strategies are fully understood. Fortunately, relevant aspects of human heart failure can be experimentally studied in tractable model animals, including the fruit fly, Drosophila, allowing the in vivo application of powerful and sophisticated molecular genetic and physiological approaches...
December 1, 2016: Heart Failure Reviews
https://www.readbyqxmd.com/read/27903260/clinical-physiologic-and-radiographic-factors-contributing-to-development-of-hypoxemia-in-moderate-to-severe-copd-a-cohort-study
#6
J Michael Wells, Raul San Jose Estepar, Merry-Lynn N McDonald, Surya P Bhatt, Alejandro A Diaz, William C Bailey, Francine L Jacobson, Mark T Dransfield, George R Washko, Barry J Make, Richard Casaburi, Edwin J R van Beek, Eric A Hoffman, Frank C Sciurba, James D Crapo, Edwin K Silverman, Craig P Hersh
BACKGROUND: Hypoxemia is a major complication of COPD and is a strong predictor of mortality. We previously identified independent risk factors for the presence of resting hypoxemia in the COPDGene cohort. However, little is known about characteristics that predict onset of resting hypoxemia in patients who are normoxic at baseline. We hypothesized that a combination of clinical, physiologic, and radiographic characteristics would predict development of resting hypoxemia after 5-years of follow-up in participants with moderate to severe COPD METHODS: We analyzed 678 participants with moderate-to-severe COPD recruited into the COPDGene cohort who completed baseline and 5-year follow-up visits and who were normoxic by pulse oximetry at baseline...
December 1, 2016: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/27900610/novel-sgc-stimulators-and-sgc-activators-for-the-treatment-of-heart-failure
#7
Stefanie Breitenstein, Lothar Roessig, Peter Sandner, Kelly S Lewis
The burden of heart failure (HF) increases worldwide with an aging population, and there is a high unmet medical need in both, heart failure with reduced ejection fraction (HFrEF) and with preserved ejection fraction (HFpEF). The nitric oxide (NO) pathway is a key regulator in the cardiovascular system and modulates vascular tone and myocardial performance. Disruption of the NO-cyclic guanosine monophosphate (cGMP) signaling axis and impaired cGMP formation by endothelial dysfunction could lead to vasotone dysregulation, vascular and ventricular stiffening, fibrosis, and hypertrophy resulting in a decline of heart as well as kidney function...
November 30, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27899470/i-trach-validating-a-tool-for-predicting-prolonged-mechanical-ventilation
#8
Paul A Clark, Ryan C Inocencio, Christopher J Lettieri
PURPOSE: We previously developed a bedside model (I-TRACH), which used commonly obtained data at the time of intubation to predict the duration of mechanical ventilation (MV). We now sought to validate this in a prospective trial. METHODS: A prospective, observational study of 225 consecutive adult medical intensive care unit patients requiring MV. Utilizing the original 6 variables used in the I-TRACH model (Intubation in the ICU, Tachycardia [heart rate > 110], Renal dysfunction [blood urea nitrogen > 25], Acidemia [pH < 7...
November 28, 2016: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/27893645/preperitoneal-pelvic-packing-reduces-mortality-in-patients-with-life-threatening-hemorrhage-due-to-unstable-pelvic-fractures
#9
Clay Cothren Burlew, Ernest E Moore, Philip F Stahel, Andrea E Geddes, Amy E Wagenaar, Fredric M Pieracci, Charles J Fox, Eric M Campion, Jeffrey L Johnson, Cyril Mauffrey
BACKGROUND: A 2015 AAST trial reported a 32% mortality for pelvic fracture patients in shock. Angioembolization (AE) is the most common intervention; the Maryland group revealed time to AE averaged 5 hours. The goal of this study was to evaluate the time to intervention and outcomes of an alternative approach for pelvic hemorrhage. We hypothesized preperitoneal pelvic packing (PPP) results in a shorter time to intervention and lower mortality. METHODS: In 2004 we initiated a PPP protocol for pelvic fracture hemorrhage...
November 23, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27893464/the-h3k9-dimethyltransferases-ehmt1-2-protect-against-pathological-cardiac-hypertrophy
#10
Bernard Thienpont, Jan Magnus Aronsen, Emma Louise Robinson, Hanneke Okkenhaug, Elena Loche, Arianna Ferrini, Patrick Brien, Kanar Alkass, Antonio Tomasso, Asmita Agrawal, Olaf Bergmann, Ivar Sjaastad, Wolf Reik, Hywel Llewelyn Roderick
Cardiac hypertrophic growth in response to pathological cues is associated with reexpression of fetal genes and decreased cardiac function and is often a precursor to heart failure. In contrast, physiologically induced hypertrophy is adaptive, resulting in improved cardiac function. The processes that selectively induce these hypertrophic states are poorly understood. Here, we have profiled 2 repressive epigenetic marks, H3K9me2 and H3K27me3, which are involved in stable cellular differentiation, specifically in cardiomyocytes from physiologically and pathologically hypertrophied rat hearts, and correlated these marks with their associated transcriptomes...
November 28, 2016: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/27891527/the-multimorbidity-index-a-tool-for-assessing-the-prognosis-of-patients-from-their-history-of-illness
#11
Farrokh Alemi, Cari R Levy, Raya E Kheirbek
BACKGROUND: The Multimorbidity (MM) Index predicts the prognosis of patients from their diagnostic history. In contrast to existing approaches with broad diagnostic categories, it treats each diagnosis as a separate independent variable using individual International Classification of Disease, Revision 9 (ICD-9) codes. OBJECTIVE: This paper describes the MM Index, reviews the published data on its accuracy, and provides procedures for implementing the Index within electronic health record (EHR) systems...
2016: EGEMS
https://www.readbyqxmd.com/read/27889803/reducing-rbm20-activity-improves-diastolic-dysfunction-and-cardiac-atrophy
#12
Florian Hinze, Christoph Dieterich, Michael H Radke, Henk Granzier, Michael Gotthardt
: Impaired diastolic filling is a main contributor to heart failure with preserved ejection fraction (HFpEF), a syndrome with increasing prevalence and no treatment. Both collagen and the giant sarcomeric protein titin determine diastolic function. Since titin's elastic properties can be adjusted physiologically, we evaluated titin-based stiffness as a therapeutic target. We adjusted RBM20-dependent cardiac isoform expression in the titin N2B knockout mouse with increased ventricular stiffness...
November 26, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27881506/development-and-evolution-of-a-hierarchical-clinical-composite-end-point-for-the-evaluation-of-drugs-and-devices-for-acute-and-chronic-heart-failure-a-20-year-perspective
#13
Milton Packer
Traditional approaches to the assessment of new treatments for heart failure have generally evaluated individual components of the syndrome at fixed points in time or have relied on surrogate physiological measures that are poorly correlated with the clinical status of patients. Conventional time-to-event trials that focus on morbidity and mortality represent an important methodological advance, but they generally assign undue weight to clinical events of less importance and are insensitive to difference in functional capacity among individuals who do not experience a clinical event during follow-up...
November 22, 2016: Circulation
https://www.readbyqxmd.com/read/27881009/late-cardiac-effect-of-anthracycline-therapy-in-physically-active-breast-cancer-survivors-a-prospective-study
#14
A C Nagy, P GulAcsi-BArdos, Z CserEp, L Hangody, T Forster
The late-onset cardiotoxic effect of anthracycline is known, however the early detection and prevention of subclinical myocardial damage has not been fully understood yet. Besides medical therapy regular physical activities may also play a role in the prevention and reduction of side effects of chemotherapy. The aim of our present study was to detect the effect of regular physical activities on the diastolic function and on the symptoms of late heart failure in case of anthracycline chemotherapy. The prospective study included 55 female patients (age 31-65 year, average 49...
November 24, 2016: Neoplasma
https://www.readbyqxmd.com/read/27864509/loss-of-%C3%AE-adrenergic-stimulated-phosphorylation-of-cav1-2-channels-on-ser1700-leads-to-heart-failure
#15
Linghai Yang, Dao-Fu Dai, Can Yuan, Ruth E Westenbroek, Haijie Yu, Nastassya West, Horacio O de la Iglesia, William A Catterall
L-type Ca(2+) currents conducted by voltage-gated calcium channel 1.2 (CaV1.2) initiate excitation-contraction coupling in the heart, and altered expression of CaV1.2 causes heart failure in mice. Here we show unexpectedly that reducing β-adrenergic regulation of CaV1.2 channels by mutation of a single PKA site, Ser1700, in the proximal C-terminal domain causes reduced contractile function, cardiac hypertrophy, and heart failure without changes in expression, localization, or function of the CaV1.2 protein in the mutant mice (SA mice)...
December 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27861429/clinical-implications-of-physiological-flow-adjustment-in-continuous-flow-left-ventricular-assist-devices
#16
Vakhtang Tchantchaleishvili, Jessica G Y Luc, Caitlin M Cohan, Kevin Phan, Laila Hübbert, Steven W Day, H Todd Massey
There is increasing evidence for successful management of end-stage heart failure with continuous-flow left ventricular assist device (CF-LVAD) technology. However, passive flow adjustment at fixed CF-LVAD speed is susceptible to flow balancing issues as well as adverse hemodynamic effects relating to the diminished arterial pulse pressure and flow. With current therapy, flow cannot be adjusted with changes in venous return, which can vary significantly with volume status. This limits the performance and safety of CF-LVAD...
November 15, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27855113/comparison-of-novel-physiological-load-adaptive-control-strategies-for-ventricular-assist-devices
#17
Moriz Habigt, Maike Ketelhut, Jonas Gesenhues, Frank Schrödel, Marc Hein, Mare Mechelinck, Thomas Schmitz-Rode, Dirk Abel, Rolf Rossaint
Terminal heart failure (HF) is the most prevalent cause of death in the Western world and the implantation of a left ventricular assist device (LVAD) has become the gold standard therapy today. Most of the actually implanted devices are driven at a constant speed (CS) regardless of the patient's physiological demand. A new physiological controller [power ratio (PR) controller], which keeps a constant ratio between LVAD power and left ventricular power, a previous concept [preload responsive speed (PRS) controller], which adds a variable LVAD power to reach a defined stroke work, and a CS controller were compared with an unimpaired ventricle in a full heart computer simulation model...
November 17, 2016: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/27854224/can-human-pluripotent-stem-cell-derived-cardiomyocytes-advance-understanding-of-muscular-dystrophies
#18
Spandan Kalra, Federica Montanaro, Chris Denning
Muscular dystrophies (MDs) are clinically and molecularly a highly heterogeneous group of single-gene disorders that primarily affect striated muscles. Cardiac disease is present in several MDs where it is an important contributor to morbidity and mortality. Careful monitoring of cardiac issues is necessary but current management of cardiac involvement does not effectively protect from disease progression and cardiac failure. There is a critical need to gain new knowledge on the diverse molecular underpinnings of cardiac disease in MDs in order to guide cardiac treatment development and assist in reaching a clearer consensus on cardiac disease management in the clinic...
August 30, 2016: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/27854009/autonomic-modulation-with-baroreflex-activation-therapy-in-heart-failure
#19
REVIEW
Edoardo Gronda, Emilio Vanoli
Baroreflex activation therapy (BAT) produces a central inhibition of cardiac sympathetic outflow and, concomitantly, an increased cardiac vagal activity via a physiological reflex pathway. In a pilot study in 11 patients with NYHA class III heart failure (HF), BAT produced a persistent significant reduction of muscle sympathetic nerve activity over a 21-month follow-up and a dramatic decrease in the number and length of hospitalizations. In a multinational, prospective, randomized, parallel-controlled, clinical trial in 146 NYHA functional class III HF, BAT produced a significant N-terminal pro-brain natriuretic peptide reduction (p = 0...
November 16, 2016: Current Heart Failure Reports
https://www.readbyqxmd.com/read/27846810/competing-risk-of-death-and-end-stage-renal-disease-in-incident-chronic-kidney-disease-stages-3-to-5-the-epiran-community-based-study
#20
Carole Ayav, Jean-Baptiste Beuscart, Serge Briançon, Alain Duhamel, Luc Frimat, Michèle Kessler
BACKGROUND: Although chronic kidney disease (CKD) affects a growing number of people, epidemiologic data on incident CKD in the general population are scarce. Screening strategies to increase early CKD detection have been developed. METHODS: From a community-based sample of 4,409 individuals residing in a well-defined geographical area, we determined the number of patients having a first serum creatinine value ≥1.7 mg/dL and present for at least 3 months that allowed us to calculate an annual incidence rate of CKD (stages 3 to 5)...
November 15, 2016: BMC Nephrology
keyword
keyword
75903
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"