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https://www.readbyqxmd.com/read/29150941/micrornas-as-predictive-biomarkers-for-myocardial-injury-in-aged-mice-following-myocardial-infarction
#1
Natia Qipshidze Kelm, Kellianne M Piell, Eugenia Wang, Marsha P Cole
The occurrence of myocardial infarction (MI) increases appreciably with age. In the Framingham Heart Study, the incidence of MI more than doubles for men and increases more than 5-fold in women (ages 55 to 64 years compared to 85 to 94 years). MicroRNAs (miRNAs) quantitatively regulate their target's expression post-transcriptionally by either silencing action through binding at the 3'UTR domains or degrading the messages at their coding regions. In either case, these regulations affect the cardiac transcriptional output and cardiac function...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29150791/16-channel-flexible-system-to-measure-electrophysiological-properties-of-bioengineered-hearts
#2
Betsy H Salazar, Kristopher A Hoffman, Anilkumar K Reddy, Sridhar Madala, Ravi K Birla
As tissue engineering continues to mature, it is necessary to develop new technologies that bring insight into current paradigms and guide improvements for future experiments. To this end, we have developed a system to characterize our bioartificial heart model and compare them to functional native structures. In the present study, the hearts of adult Sprague-Dawley were decellularized resulting in a natural three-dimensional cardiac scaffold. Neonatal rat primary cardiac cells were then cultured within a complex 3D fibrin gel, forming a 3-dimensional cardiac construct, which was sutured to the acellular scaffold and suspended in media for 24-48 h...
November 17, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/29150779/perioperative-transesophageal-echocardiography-for-non-cardiac-surgery
#3
REVIEW
Ashraf Fayad, Sasha K Shillcutt
PURPOSE: The use of transesophageal echocardiography (TEE) has evolved to include patients undergoing high-risk non-cardiac procedures and patients with significant cardiac disease undergoing non-cardiac surgery. Implementation of basic TEE education in training programs has increased across a broad spectrum of procedures in the perioperative arena. This paper describes the use of perioperative TEE in non-cardiac surgery and provides an overview of the basic TEE examination. PRINCIPAL FINDINGS: Perioperative TEE is used to monitor hemodynamic parameters in non-cardiac procedures where there is a high risk of hemodynamic instability...
November 17, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29150533/disparity-between-indications-for-and-utilization-of-implantable-cardioverter-defibrillators-in-asian-patients-with-heart-failure
#4
Yvonne May Fen Chia, Tiew-Hwa Katherine Teng, Eugene S J Tan, Wan Ting Tay, A Mark Richards, Calvin Woon Loong Chin, Wataru Shimizu, Sang Weon Park, Chung-Lieh Hung, Lieng H Ling, Tachapong Ngarmukos, Razali Omar, Bambang B Siswanto, Calambur Narasimhan, Eugene B Reyes, Cheuk-Man Yu, Inder Anand, Michael R MacDonald, Jonathan Yap, Shu Zhang, Eric A Finkelstein, Carolyn S P Lam
BACKGROUND: Implantable cardioverter defibrillators (ICDs) are lifesaving devices for patients with heart failure (HF) and reduced ejection fraction. However, utilization and determinants of ICD insertion in Asia are poorly defined. We determined the utilization, associations of ICD uptake, patient-perceived barriers to device therapy and, impact of ICDs on mortality in Asian patients with HF. METHODS AND RESULTS: Using the prospective ASIAN-HF (Asian Sudden Cardiac Death in Heart Failure) registry, 5276 patients with symptomatic HF and reduced ejection fraction (HFrEF) from 11 Asian regions and across 3 income regions (high: Hong Kong, Japan, Korea, Singapore, and Taiwan; middle: China, Malaysia, and Thailand; and low: India, Indonesia, and Philippines) were studied...
November 2017: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/29150530/declining-rates-of-hospitalization-for-selected-cardiovascular-disease-conditions-among-adults-aged-%C3%A2-35-years-with-diagnosed-diabetes-u-s-1998-2014
#5
Nilka Ríos Burrows, YanFeng Li, Edward W Gregg, Linda S Geiss
OBJECTIVE: Reductions in heart attack and stroke hospitalizations are well documented in the U.S. population with diabetes. We extended trend analyses to other cardiovascular disease (CVD) conditions, including stroke by type, and used four additional years of data. RESEARCH DESIGN AND METHODS: Using 1998-2014 National (Nationwide) Inpatient Sample data, we estimated the number of discharges having acute coronary syndrome (ACS) (ICD-9 codes 410-411), cardiac dysrhythmia (427), heart failure (428), hemorrhagic stroke (430-432), or ischemic stroke (433...
November 17, 2017: Diabetes Care
https://www.readbyqxmd.com/read/29150445/the-antiapoptotic-protein-hax-1-mediates-half-of-phospholamban-s-inhibitory-activity-on-calcium-cycling-and-contractility-in-the-heart
#6
Philip A Bidwell, Kobra Haghighi, Evangelia G Kranias
The antiapoptotic protein HS-associated protein X-1 (HAX-1) localizes to sarcoplasmic reticulum (SR) in the heart and interacts with the small membrane protein phospholamban (PLN), inhibiting the cardiac sarco/endoplasmic reticulum calcium ATPase (SERCA2a) in the regulation of overall calcium handling and heart muscle contractility. However, because global HAX-1 deletion causes early lethality, how much endogenous HAX-1 contributes to PLN's inhibitory activity on calcium cycling is unknown. We therefore generated a cardiac-specific and inducible knockout mouse model...
November 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29150426/long-term-outcomes-in-patients-with-type-2-myocardial-infarction-and-myocardial-injury
#7
Andrew R Chapman, Anoop S V Shah, Kuan Ken Lee, Atul Anand, Oliver Francis, Philip Adamson, David A McAllister, Fiona Strachan, David E Newby, Nicholas L Mills
Background -Type 2 myocardial infarction and myocardial injury are common in clinical practice, but long-term consequences are uncertain. We aimed to define long-term outcomes and explore risk stratification in patients with type 2 myocardial infarction and myocardial injury. Methods -We identified consecutive patients (n=2,122) with elevated cardiac troponin I concentrations (≥0.05 μg/L) at a tertiary cardiac center. All diagnoses were adjudicated as per the Universal Definition of Myocardial Infarction...
November 17, 2017: Circulation
https://www.readbyqxmd.com/read/29150300/permanent-his-bundle-pacing-to-replace-biventricular-pacing-for-cardiac-resynchronization-therapy
#8
Benjamin J Scherlag, Alexa Papaila
INTRODUCTION: Cardiac resynchronization therapy (CRT) or biventricular pacing (BIVP) has become a common procedure for the treatment of ventricular dyssynchrony in patients with heart failure, particularly in those with bundle branch block patterns (QRS durations >150ms) on the electrocardiogram (ECG). However, a large group of non-responders are made up of patients with dyssynchrony and QRS duration below 130ms. Recent studies have introduced permanent His bundle pacing as another method for achieving normalization of the QRS duration even in a majority of patients with right or left bundle branch block pattern on the ECG...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150159/diagnostic-performance-of-pulmonary-capacitance-at-rest-and-during-exercise-in-idiopathic-pulmonary-arterial-hypertension
#9
Pankaj Jain, Sriram Rao, Peter Macdonald, Eugene Kotlyar, Andrew Jabbour, Christopher Hayward, Anne Keogh
BACKGROUND: Reliable markers of early disease are needed in pulmonary arterial hypertension (PAH). As measures of the contribution of abnormal vascular compliance to overall vascular resistance, resting and exercise pulmonary capacitance-defined as the stroke volume divided by the change in pulmonary pulse pressure-may be sensitive markers of early disease. METHODS: We examined all patients in our pulmonary hypertension database with idiopathic PAH, who had undergone rest and exercise right heart catheterisation in one sitting...
November 8, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29150149/pregnancy-and-heart-disease-pregnancy-associated-hypertension-and-peripartum-cardiomyopathy
#10
Tobias Jonathan Pfeffer, Denise Hilfiker-Kleiner
Cardiovascular diseases are major complications in pregnancy worldwide and the number of patients who develop cardiac problems during pregnancy is increasing. Pregnancy-associated hypertensive complications such as pre-eclampsia (PE) or peripartum cardiomyopathy (PPCM) are potentially life-threatening heart diseases emerging during pregnancy, under delivery or in the first postpartal months in previously healthy women. Both disease entities display substantial morbidity and mortality in the acute phase. Long-term effects are just beginning to be evaluated...
October 31, 2017: Current Problems in Cardiology
https://www.readbyqxmd.com/read/29150126/hypertrophic-cardiomyopathy
#11
REVIEW
Juan José Santos Mateo, María Sabater Molina, Juan Ramón Gimeno Blanes
Hypertrophic cardiomyopathy is the most common inherited cardiovascular disease. It is characterized by increased ventricular wall thickness and is highly complex due to its heterogeneous clinical presentation, several phenotypes, large number of associated causal mutations and broad spectrum of complications. It is caused by mutations in sarcomeric proteins, which are identified in up to 60% of cases of the disease. Clinical manifestations of Hypertrophic Cardiomyopathy include shortness of breath, chest pain, palpitations and syncope, which are related to the onset of diastolic dysfunction, left ventricular outflow tract obstruction, ischemia, atrial fibrillation and abnormal vascular responses...
November 14, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/29150036/thoracic-surgery-considerations-in-the-child-and-young-adult
#12
REVIEW
Marvin D Atkins, Stephanie Fuller
Vascular rings and slings may represent life-threatening compression of the esophagus and trachea. Such anatomic variants, although rare, are encountered by all thoracic surgeons in the scope of their practice at some time. The thoracic surgeon, whether treating such patients in the practice of congenital heart surgery, or in the practice of adult cardiac or thoracic surgery must have a requisite understanding of such anatomic variants, their diagnostic workup and radiologic interpretation, as well as their surgical management...
February 2018: Thoracic Surgery Clinics
https://www.readbyqxmd.com/read/29149941/pathophysiology-of-septic-shock
#13
REVIEW
James A Russell, Barret Rush, John Boyd
Fundamental features of septic shock are vasodilation, increased permeability, hypovolemia, and ventricular dysfunction. Vasodilation owing to increased nitric oxide and prostaglandins is treated with vasopressors (norepinephrine first). Increased permeability relates to several pathways (Slit/Robo4, vascular endothelial growth factor, angiopoietin 1 and 2/Tie2 pathway, sphingosine-1-phosphate, and heparin-binding protein), some of which are targets for therapies. Hypovolemia is common and crystalloid is recommended for fluid resuscitation...
January 2018: Critical Care Clinics
https://www.readbyqxmd.com/read/29149759/dusp1-alleviates-cardiac-ischemia-reperfusion-injury-by-suppressing-the-mff-required-mitochondrial-fission-and-bnip3-related-mitophagy-via-the-jnk-pathways
#14
Qinhua Jin, Ruibing Li, Nan Hu, Ting Xin, Pingjun Zhu, Shunying Hu, Sai Ma, Hong Zhu, Jun Ren, Hao Zhou
Mitochondrial fission and selective mitochondrial autophagy (mitophagy) form an essential axis of mitochondrial quality control that plays a critical role in the development of cardiac ischemia-reperfusion (IR) injury. However, the precise upstream molecular mechanism of fission/mitophagy remains unclear. Dual-specificity protein phosphatase1 (DUSP1) regulates cardiac metabolism, but its physiological contribution in the reperfused heart, particularly its influence on mitochondrial homeostasis, is unknown. Here, we demonstrated that cardiac DUSP1 was downregulated following acute cardiac IR injury...
November 6, 2017: Redox Biology
https://www.readbyqxmd.com/read/29149500/ep-radiofrequency-generators-significant-offsets-between-selected-and-delivered-power
#15
Felix Bourier, Bernhard Schwarz, Amir Brkic, Lara Wolf, Verena Semmler, Marc Kottmaier, Elena Risse, Marta Telishevska, Stephanie Brooks, Sarah Lengauer, Marielouise Kornmayer, Katharina Koch-Büttner, Florian Berger, Gabriele Hessling, Isabel Deisenhofer, Tilko Reents
INTRODUCTION: For radiofrequency ablation, the EP Shuttle®, Ampere®, and SmartAblate® generator models are most frequently used in clinical practice. The aim of this study was to assess the correlation between selected and delivered RF power for different generators. METHODS AND RESULTS: In an experimental setup, ablation catheters were connected to the EP Shuttle®, Ampere®, and SmartAblate® generators. The power delivered by the generators was measured using a current converter and an oscilloscope...
November 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29149455/positive-effect-on-patient-experience-of-video-information-given-prior-to-cardiovascular-magnetic-resonance-imaging-a-clinical-trial
#16
Britt-Marie Ahlander, Jan Engvall, Eva Maret, Elisabeth Ericsson
AIMS: To evaluate the effect of video information given before cardiovascular magnetic resonance imaging on patient anxiety and to compare patient experiences of cardiovascular magnetic resonance imaging versus myocardial perfusion scintigraphy. To evaluate if additional information has an impact on motion artefacts. BACKGROUND: Cardiovascular magnetic resonance imaging and myocardial perfusion scintigraphy are technically advanced methods for the evaluation of heart diseases...
November 17, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/29149268/mitral-valve-replacement-with-the-novel-tribio-and-an-established-stented-bioprosthesis-in-a-sheep-model
#17
Sina Stock, Hans-Hinrich Sievers, Doreen Richardt, Michael Scharfschwerdt
OBJECTIVES: Heart valve replacement with a bioprosthesis is one of the most frequently performed procedures in cardiac surgery and represents a highly effective therapy to relieve diseased heart valves. Nevertheless, as postoperatively elevated transvalvular gradients and prosthesis-patient mismatch are reported as shortcomings of the procedure or of the currently used devices, there is a need for novel bioprostheses with improved haemodynamics. This study presents preclinical haemodynamic results after mitral valve replacement with the novel TRIBIO bioprosthesis (TRIBIO) compared with an established bioprosthesis in a sheep model...
November 15, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29149189/perioperative-body-weight-change-is-associated-with-in-hospital-mortality-in-cardiac-surgical-patients-with-postoperative-acute-kidney-injury
#18
Chih-Chung Shiao, Ya-Ting Huang, Tai-Shuan Lai, Tao-Min Huang, Jian-Jhong Wang, Chun-Te Huang, Pei-Chen Wu, Che-Hsiung Wu, I-Jung Tsai, Li-Jung Tseng, Chih-Hsien Wang, Tzong-Shinn Chu, Kwan-Dun Wu, Vin-Cent Wu
BACKGROUND: Postoperative acute kidney injury (AKI) is common following cardiac surgery (CS). Body weight (BW) may be an amenable variable by representing the summation of the nutritional and the fluid status. However, the predictive role of perioperative BW changes in CS patients with severe postoperative AKI is never explored. This study aimed to evaluate this association. METHODS: This study was conducted using a prospectively collected multicenter cohort, NSARF (National Taiwan University Hospital Study Group on Acute Renal Failure) database...
2017: PloS One
https://www.readbyqxmd.com/read/29148548/acrylate-based-materials-for-heart-valve-scaffold-engineering
#19
Rosaria Santoro, Seshasailam Venkateswaran, Francesco Amadeo, Rong Zhang, Maura Brioschi, Anthony Callanan, Marco Agrifoglio, Cristina Banfi, Mark Bradley, Maurizio Pesce
Calcific aortic valve disease (CAVD) is the most frequent cardiac valve pathology. Its standard treatment consists of surgical replacement either with mechanical (metal made) or biological (animal tissue made) valve prostheses, both of which have glaring deficiencies. In the search for novel materials to manufacture artificial valve tissue, we have conducted a high-throughput screening with subsequent up-scaling to identify non-degradable polymer substrates that promote valve interstitial cells (VICs) adherence/growth and, at the same time, prevent their evolution toward a pro-calcific phenotype...
November 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/29148430/low-dose-4d-cardiac-imaging-in-small-animals-using-dual-source-micro-ct
#20
Matthew Holbrook, Darin P Clark, Cristian T Badea
Micro-CT is widely used in preclinical studies, generating substantial interest in extending its capabilities in functional imaging applications such as blood perfusion and cardiac function. However, imaging cardiac structure and function in mice is challenging due to their small size and rapid heart rate. To overcome these challenges, we propose and compare improvements on two strategies for cardiac gating in dual-source, preclinical micro-CT: fast prospective gating (PG) and uncorrelated retrospective gating (RG)...
November 17, 2017: Physics in Medicine and Biology
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