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https://www.readbyqxmd.com/read/29792339/pulmonary-hypertension-in-congenital-heart-disease
#1
Emma Pascall, Robert Mr Tulloh
Pulmonary hypertension is defined as a mean pulmonary arterial pressure ≥25 mmHg. We focus on its relevance in congenital heart disease, reviewing pathophysiology, diagnosis and management. Pulmonary hypertension is a relatively common complication of congenital heart disease, with adult prevalence between 5 and 10%. A multifactorial cause is recognized, relating to the size and nature of cardiac defect as well as environmental and genetic factors. More complex disease is increasingly recognized rather than pure Eisenmenger complex...
May 24, 2018: Future Cardiology
https://www.readbyqxmd.com/read/29791869/ghrelin-and-the-heart
#2
Takeshi Tokudome, Kentaro Otani, Mikiya Miyazato, Kenji Kangawa
Ghrelin, a growth hormone-releasing peptide that was first discovered in the stomach of rats in 1999, is an endogenous ligand of growth hormone secretagogue receptor. Ghrelin exerts its potent growth hormone-releasing and orexigenic activities by binding to specific receptors in the brain. Subsequent studies showed that ghrelin participates in the regulation of diverse processes, including energy balance, body weight maintenance, and glucose and fat metabolism, and demonstrated that ghrelin is beneficial for treatment of cardiac diseases...
May 20, 2018: Peptides
https://www.readbyqxmd.com/read/29791840/dynamic-cellular-integration-drives-functional-assembly-of-the-heart-s-pacemaker-complex
#3
Michael Bressan, Trevor Henley, Jonathan D Louie, Gary Liu, Danos Christodoulou, Xue Bai, Joan Taylor, Christine E Seidman, J G Seidman, Takashi Mikawa
Impulses generated by a multicellular, bioelectric signaling center termed the sinoatrial node (SAN) stimulate the rhythmic contraction of the heart. The SAN consists of a network of electrochemically oscillating pacemaker cells encased in a heterogeneous connective tissue microenvironment. Although the cellular composition of the SAN has been a point of interest for more than a century, the biological processes that drive the tissue-level assembly of the cells within the SAN are unknown. Here, we demonstrate that the SAN's structural features result from a developmental process during which mesenchymal cells derived from a multipotent progenitor structure, the proepicardium, integrate with and surround pacemaker myocardium...
May 22, 2018: Cell Reports
https://www.readbyqxmd.com/read/29790948/cardioprotection-induced-by-activation-of-gper-in-ovariectomized-rats-with-pulmonary-hypertension
#4
Allan K N Alencar, Guilherme C Montes, Daniele G Costa, Luiza V P Mendes, Ananssa M S Silva, Sabrina T Martinez, Margarete M Trachez, Valéria do M N Cunha, Tadeu L Montagnoli, Aline G M Fraga, Hao Wang, Leanne Groban, Carlos A M Fraga, Roberto T Sudo, Gisele Zapata-Sudo
Pulmonary hypertension (PH) is a disease of women (female-to-male ratio 4:1), and is associated with cardiac and skeletal muscle dysfunction. Herein, the activation of a new estrogen receptor (GPER) by the agonist G1 was evaluated in oophorectomized rats with monocrotaline (MCT)-induced PH. Depletion of estrogen was induced by bilateral oophorectomy (OVX) in Wistar rats. Experimental groups included SHAM or OVX rats that received a single intraperitoneal injection of MCT (60 mg/kg) for PH induction. Animals received s...
May 21, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29789980/metabolic-remodeling-of-substrate-utilization-during-heart-failure-progression
#5
REVIEW
Liang Chen, Jiangping Song, Shengshou Hu
Heart failure (HF) is a clinical syndrome caused by a decline in cardiac systolic or diastolic function, which leaves the heart unable to pump enough blood to meet the normal physiological requirements of the human body. It is a serious disease burden worldwide affecting nearly 23 million patients. The concept that heart failure is "an engine out of fuel" has been generally accepted and metabolic remodeling has been recognized as an important aspect of this condition; it is characterized by defects in energy production and changes in metabolic pathways involved in the regulation of essential cellular functions such as the process of substrate utilization, the tricarboxylic acid cycle, oxidative phosphorylation, and high-energy phosphate metabolism...
May 23, 2018: Heart Failure Reviews
https://www.readbyqxmd.com/read/29786408/impact-of-additional-tricuspid-valve-annuloplasty-in-tof-patients-undergoing-pulmonary-valve-replacement
#6
Sabrina Lueck, Eike Bormann, Kathrin Rellensmann, Sven Martens, Andreas Rukosujew
BACKGROUND: Many patients with tetralogy of Fallot (TOF) who underwent surgical correction of their congenital cardiac malformation during infancy develop right ventricular dysfunction and exercise intolerance in the long term. The right ventricle (RV) dilates due to the development of severe pulmonary regurgitation (and secondary tricuspid insufficiency). To reduce RV dilation and improve exercise tolerance pulmonary valve replacement (PVR) is the common therapeutic strategy. Whether concomitant tricuspid valve repair (TVR) is beneficial in these pure volume-overload conditions is still unknown...
May 22, 2018: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29786039/role-of-soluble-st2-levels-and-beta-blockers-dosage-on-cardiovascular-events-of-patients-with-unselected-st-segment-elevation-myocardial-infarction
#7
Wei-Ping Huang, Xuan Zheng, Lei He, Xi Su, Cheng-Wei Liu, Ming-Xiang Wu
Background: Serum soluble ST2 (sST2) levels are elevated early after acute myocardial infarction and are related to adverse left ventricular (LV) remodeling and cardiovascular outcomes in ST-segment elevation myocardial infarction (STEMI). Beta-blockers (BB) have been shown to improve LV remodeling and survival. However, the relationship between sST2, final therapeutic BB dose, and cardiovascular outcomes in STEMI patients remains unknown. Methods: A total of 186 STEMI patients were enrolled at the Wuhan Asia Heart Hospital between January 2015 and June 2015...
June 5, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29785884/morphological-changes-and-myocardial-function-assessed-by-traditional-and-novel-echocardiographic-methods-in-preadolescent-athlete-s-heart
#8
Anders W Bjerring, Hege Ew Landgraff, Svein Leirstein, Anette Aaeng, Hamza Z Ansari, Jørg Saberniak, Klaus Murbræch, Henrik Bruun, Thomas M Stokke, Kristina H Haugaa, Jostein Hallén, Thor Edvardsen, Sebastian I Sarvari
Background Athlete's heart is a term used to describe the morphological and functional changes in the hearts of athletes. Recent studies suggest that these changes may occur even in preadolescent athletes. This study aims to improve our understanding of the changes occurring in the preadolescent athlete's heart. Design and methods Cardiac morphology and function in 76 preadolescent cross-country skiers (aged 12.1 ± 0.2 years) were compared with 25 age-matched non-competing preadolescents. Echocardiography was performed in all subjects, including 2D speckle-tracking strain echocardiography and 3D echocardiography...
January 1, 2018: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29782286/-ngal-as-a-marker-for-some-extrarenal-complications-in-acute-coronary-syndrome
#9
M A Shalenkova, Z D Mikhailova, P F Klimkin
AIM: To study the role of neutrophil gelatinase-associated lipocalin (NGAL) as a marker for extrarenal complications in patients with acute coronary syndrome (ACS). MATERIALS AND METHODS: For 110 patients with ACS on days 1-3 of hospitalization, concentrations of NGAL, serum (s-NGAL) and urinary (u-NGAL) NGAL, and N-terminal fragment of pro-B natriuretic peptide (NT-proBNP) were measured, and transthoracic echocardiography was performed. Incidence of cardiovascular complications was determined during the stay in the hospital; hemodynamic parameters (systolic and diastolic blood pressure, heart rate) were measured on admission...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29780728/intimal-re-layering-technique-for-type-a-acute-aortic-dissection-reconstructing-the-intimal-layer-continuity-to-induce-remodeling-of-the-false-channel
#10
Eugenio Neri, Enrico Tucci, Giulio Tommasino, Giulia Guaccio, Carmelo Ricci, Pierleone Lucatelli, Marco Cini, Roberto Ceresa, Antonio Benvenuti, Luigi Muzzi
Background: Residual false channel is common after repair of type A acute aortic dissection (TAAAD). Starting from our recent series of TAAAD patients we carried out a retrospective analysis, regarding the failure of primary exclusion at the time of the initial operation. We classified the location of the principal entry tears perfusing the residual false channel. The proposed technique represents our attempt to correct the mechanism of false channel perfusion during primary repair. We describe a new technique designed to address some limitations of standard hemiarch aortic replacement...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29779700/plasma-circulating-extracellular-rnas-in-left-ventricular-remodeling-post-myocardial-infarction
#11
Kirsty M Danielson, Ravi Shah, Ashish Yeri, Xiaojun Liu, Fernando Camacho Garcia, Michael Silverman, Kahraman Tanriverdi, Avash Das, Chunyang Xiao, Michael Jerosch-Herold, Bobak Heydari, Siddique Abbasi, Kendall Van Keuren-Jensen, Jane E Freedman, Yaoyu E Wang, Anthony Rosenzweig, Raymond Y Kwong, Saumya Das
Despite substantial declines in mortality following myocardial infarction (MI), subsequent left ventricular remodeling (LVRm) remains a significant long-term complication. Extracellular small non-coding RNAs (exRNAs) have been associated with cardiac inflammation and fibrosis and we hypothesized that they are associated with post-MI LVRm phenotypes. RNA sequencing of exRNAs was performed on plasma samples from patients with "beneficial" (decrease LVESVI ≥ 20%, n = 11) and "adverse" (increase LVESVI ≥ 15%, n = 11) LVRm...
May 17, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29778861/multicenter-randomized-controlled-crossover-trial-comparing-hemodynamic-optimization-against-echocardiographic-optimization-of-av-and-vv-delay-of-cardiac-resynchronization-therapy-the-bravo-trial
#12
Zachary I Whinnett, S M Afzal Sohaib, Mark Mason, Edward Duncan, Mark Tanner, David Lefroy, Mohamed Al-Obaidi, Sue Ellery, Francisco Leyva-Leon, Tim Betts, Mark Dayer, Paul Foley, Jon Swinburn, Martin Thomas, Raj Khiani, Tom Wong, Zaheer Yousef, Dominic Rogers, Paul R Kalra, Vignesh Dhileepan, Katherine March, James Howard, Andreas Kyriacou, Jamil Mayet, Prapa Kanagaratnam, Michael Frenneaux, Alun D Hughes, Darrel P Francis
OBJECTIVES: BRAVO (British Randomized Controlled Trial of AV and VV Optimization) is a multicenter, randomized, crossover, noninferiority trial comparing echocardiographic optimization of atrioventricular (AV) and interventricular delay with a noninvasive blood pressure method. BACKGROUND: Cardiac resynchronization therapy including AV delay optimization confers clinical benefit, but the optimization requires time and expertise to perform. METHODS: This study randomized patients to echocardiographic optimization or hemodynamic optimization using multiple-replicate beat-by-beat noninvasive blood pressure at baseline; after 6 months, participants were crossed over to the other optimization arm of the trial...
May 11, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29777559/utility-of-heart-rate-turbulence-and-t-wave-alternans-to-assess-risk-for-re-admission-and-cardiac-death-in-hospitalized-heart-failure-patients
#13
Shinya Yamada, Akiomi Yoshihisa, Yu Sato, Takamasa Sato, Masashi Kamioka, Takashi Kaneshiro, Masayoshi Oikawa, Atsushi Kobayashi, Hitoshi Suzuki, Takafumi Ishida, Yasuchika Takeishi
BACKGROUND: Heart failure (HF) patients have a higher risk of recurrent HF and cardiac death, and electrical remodeling is considered to be an important factor for HF progression. The present study aimed to validate the utility of electrocardiogram and Holter monitoring for the risk stratification of HF patients. METHODS: Our study comprised 215 patients (144 males, mean age 62 years) who had been hospitalized due to acute decompensated HF. Electrocardiogram (QRS duration and QTc interval) and 24-hour Holter monitoring (heart rate variability, heart rate turbulence and T-wave alternans [TWA]) were performed in stable condition before discharge...
May 18, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29777508/endothelial-progenitor-cells-in-heart-failure-an-authentic-expectation-for-potential-future-use-and-a-lack-of-universal-definition
#14
REVIEW
Andie H Djohan, Ching-Hui Sia, Poay Sian Lee, Kian-Keong Poh
Congestive heart failure (CHF) is a prevalent disease (especially among the elderly) with high mortality and morbidity rates. The pathological hallmark of CHF is a loss of cardiomyocytes leading to cardiac fibrosis and dysfunctional cardiac remodeling, which culminates in organ failure. Endothelial progenitor cells (EPCs) are bone marrow-derived cells that contribute to maintenance of the integrity of endothelial wall and protect ischemic myocardium through forming new blood vessels (vasculogenesis) or proliferation of pre-existing vasculature (angiogenesis)...
May 17, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29777140/different-responses-of-left-atrium-and-left-atrial-appendage-to-radiofrequency-catheter-ablation-of-atrial-fibrillation-a-follow-up-mri-study
#15
Yun Gi Kim, Jaemin Shim, Suk-Kyu Oh, Hee-Soon Park, Kwang-No Lee, Sung Ho Hwang, Jong-Il Choi, Young-Hoon Kim
Atrial fibrillation (AF) is known to cause adverse remodeling of left atrium (LA). Radiofrequency catheter ablation (RFCA) of AF is associated with decrease in LA volume. However, the impact of RFCA on left atrial appendage (LAA) volume and hemodynamic function is not fully understood. We analyzed 123 patients who underwent cardiac magnetic resonance imaging (MRI) evaluation before and after RFCA in Korea University Anam Hospital. LA and LAA volume were measured before and after RFCA based on cardiac MRI. Baseline LA volume was 99...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29776421/evidence-for-a-hyper-reductive-redox-in-a-sub-set-of-heart-failure-patients
#16
Thiagarajan Sairam, Amit N Patel, Meenu Subrahmanian, Rajendiran Gopalan, Steven M Pogwizd, Sudha Ramalingam, Ramalingam Sankaran, Namakkal Soorapan Rajasekaran
BACKGROUND: Oxidative stress has been linked to heart failure (HF) in humans. Antioxidant-based treatments are often ineffective. Therefore, we hypothesize that some of the HF patients might have a reductive stress (RS) condition. Investigating RS-related mechanisms will aid in personalized optimization of redox homeostasis for better outcomes among HF patients. METHODS: Blood samples were collected from HF patients (n = 54) and healthy controls (n = 42) and serum was immediately preserved in - 80 °C for redox analysis...
May 18, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29775412/inhibitor-of-lysyl-oxidase-improves-cardiac-function-and-the-collagen-mmp-profile-in-response-to-volume-overload
#17
Elia C El Hajj, Milad C El Hajj, Van K Ninh, Jason D Gardner
The cardiac extracellular matrix is a complex architectural network that serves many functions including providing structural and biochemical support to surrounding cells, and regulating intercellular signaling pathways. Cardiac function is directly affected by extracellular matrix (ECM) composition, and alterations of the ECM contribute to progression of heart failure. Initially, collagen deposition is an adaptive response that aims to preserve tissue integrity and maintain normal ventricular function. However, the synergistic effects of the pro-inflammatory and pro-fibrotic responses induce a vicious cycle which causes excess activation of myofibroblasts, significantly increasing collagen deposition and accumulation in the matrix...
May 18, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29774121/mir-33-promotes-myocardial-fibrosis-by-inhibiting-mmp16-and-stimulating-p38-mapk-signaling
#18
Zhen Chen, Hua-Sheng Ding, Xin Guo, Jing-Jing Shen, Di Fan, Yan Huang, Cong-Xin Huang
Myocardial fibrosis occurs in the late stages of many cardiovascular diseases, and appears to be stimulated by various microRNAs (miRNAs). We previously found that miR-33 may stimulate cardiac remodeling. Here, we examined the involvement of miR-33 in myocardial fibrosis. Proximal left coronary descending artery occlusion was performed in rat, and antagomiR-33a was injected. Primary cardiac fibroblasts were cultured and transfected with miR-33a mimics and inhibitors. miR-33a levels were increased in the rat after surgery, and collagen deposition and heart fibrosis were observed in vivo ...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773412/athlete-s-heart-is-the-morganroth-hypothesis-obsolete
#19
Mark J Haykowsky, T Jake Samuel, Michael D Nelson, Andre La Gerche
In 1975, Morganroth and colleagues reported that the increased left ventricular (LV) mass in highly trained endurance athletes versus nonathletes was primarily due to increased end-diastolic volume while the increased LV mass in resistance trained athletes was solely due to an increased LV wall thickness. Based on the divergent remodelling patterns observed, Morganroth and colleagues hypothesised that the increased "volume" load during endurance exercise may be similar to that which occurs in patients with mitral or aortic regurgitation while the "pressure" load associated with performing a Valsalva manoeuvre (VM) during resistance exercise may mimic the stress imposed on the heart by systemic hypertension or aortic stenosis...
May 1, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29773058/non-cardiomyocytes-in-heart-regeneration
#20
Jie Feng, Yandong Li, Yu Nie
Heart failure represents a challenging clinical and public health problem and is associated with significant morbidity and mortality. Mechanistically, loss of cardiomyocytes leads to decompensated ventricular remodeling, which eventually progressed to cardiac failure. Regenerative medicine aimed to supplement functional cardiomyocytes is supposedly a promising approach for the effective treatment of heart failure. Over the past decades, investigations on heart regeneration have revealed the regulating networks of cardiomyocyte proliferation...
May 17, 2018: Current Drug Targets
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