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Atrial fibrosis

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https://www.readbyqxmd.com/read/29016990/age-and-sex-differences-in-atrial-fibrosis-among-patients-with-atrial-fibrillation
#1
Nazem Akoum, Christian Mahnkopf, Eugene G Kholmovski, Johannes Brachmann, Nassir F Marrouche
Aim: Age and female sex are associated with a higher risk of stroke in atrial fibrillation (AF). We sought to determine whether advancing age and female sex are associated with higher atrial fibrosis. Methods and results: We conducted an observational cohort study of patients with AF enrolled in the University of Utah AF Database and a non-AF control group who underwent late-gadolinium enhancement magnetic resonance imaging (LGE-MRI) for atrial fibrosis quantification...
August 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29016802/intra-atrial-re-entrant-tachycardia-in-congenital-heart-disease-types-and-relation-of-isthmus-to-atrial-voltage
#2
Ivo Roca-Luque, Nuria Rivas Gándara, Laura Dos Subirà, Jaume Francisco Pascual, Antònia Pijuan Domenech, Jordi Pérez-Rodon, M Teresa Subirana, Alba Santos Ortega, Berta Miranda, Ferran Rosés-Noguer, Ignacio Ferreira-Gonzalez, Jaume Casaldàliga Ferrer, David García-Dorado García, Angel Moya Mitjans
Background: Intra-atrial re-entrant tachycardia (IART) is a frequent and severe complication in patients with congenital heart disease (CHD). Cavotricuspid isthmus (CTI)-related IART is the most frequent mechanism. However, due to fibrosis and surgical scars, non-CTI-related IART is also frequent. Objective: The main objective of this study was to describe the types of IART and circuit locations and to define a cut-off value for unhealthy tissue in the atria. Methods and results: This observational study included all consecutive patients with CHD who underwent a first ablation procedure for IART from January 2009 to December 2015 (94 patients, 39...
August 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29016766/temporal-pattern-episode-duration-based-classification-of-atrial-fibrillation-as-paroxysmal-vs-persistent-is-it-time-to-develop-a-more-integrated-prognostic-score-to-optimize-management
#3
Matthew Hammond-Haley, Rui Providência, Pier D Lambiase
Atrial fibrillation (AF) is a clinically heterogeneous arrhythmia that is currently classified according to the variety of temporal rhythm based manifestations observed clinically, including 'first detected episode', 'paroxysmal', 'persistent', or 'permanent' AF. Despite being widely adopted by the most recent consensus guidelines, the utility of this classification system to stratify patients into distinct and clinically useful groups that have different outcomes including mortality, morbidity, specific cardiovascular outcomes, and quality of life (QoL), remains questionable...
July 11, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28993090/possible-role-of-rivaroxaban-in-attenuating-pressure-overload-induced-atrial-fibrosis-and-fibrillation
#4
Hidekazu Kondo, Ichitaro Abe, Akira Fukui, Shotaro Saito, Miho Miyoshi, Kohei Aoki, Tetsuji Shinohara, Yasushi Teshima, Kunio Yufu, Naohiko Takahashi
BACKGROUND: Coagulation factor Xa (FXa) promotes thrombus formation and exacerbates inflammation via activation of protease-activated receptor (PAR)-2. We tested the hypothesis of whether administration of direct oral anticoagulant, rivaroxaban, would attenuate transverse aortic constriction (TAC)-induced atrial inflammatory fibrosis and vulnerability to atrial fibrillation (AF) in mice. METHODS: Ten-week-old male CL57/B6 mice were divided into a sham-operation (CNT) group and TAC-surgery group...
October 6, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28990508/biomarkers-of-atrial-fibrillation-in-hypertension
#5
Costas Tsioufis, Dimitrios Konstantinidis, Elias Nikolakopoulos, Evi Vemou, Theodoros Kalos, Georgios Georgiopoulos, Nikos Vogiatzakis, Aristos Ifantis, Konstantinos Konstantinou, V Gennimata, Dimitris Tousoulis
It is well known that atrial fibrillation (AF) is the most frequent cardiac arrhythmia worldwide and substantially increases the risk for thromboembolic disease. One of the main problems is that it remains undiagnosed (about 20% of all cases of AF). On the other hand, hypertension amplifies the risk for both AF occurrences through hemodynamic and non-hemodynamic mechanisms and cerebrovascular ischemia. Under this prism, prompt diagnosis of undetected AF in hypertensive patients is of pivotal importance. Biomarkers could be used in AF diagnosis as well as in predicting the transition of paroxysmal AF to sustained AF...
October 6, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28981521/nonalcoholic-fatty-liver-disease-is-associated-with-an-increased-risk-of-heart-block-in-hospitalized-patients-with-type-2-diabetes-mellitus
#6
Alessandro Mantovani, Riccardo Rigolon, Isabella Pichiri, Stefano Bonapace, Giovanni Morani, Giacomo Zoppini, Enzo Bonora, Giovanni Targher
Recent studies suggested that nonalcoholic fatty liver disease (NAFLD) is associated with an increased risk of cardiac tachyarrhythmias (mainly atrial fibrillation) in patients with and without type 2 diabetes mellitus. The aim of this study was to examine whether an association also exists between NAFLD and heart block. We have retrospectively evaluated a hospital-based cohort of 751 patients with type 2 diabetes discharged from our Division of Diabetes and Endocrinology during years 2007-2014. Standard electrocardiograms were performed on all patients...
2017: PloS One
https://www.readbyqxmd.com/read/28977055/evaluation-of-left-ventricular-diastolic-function-by-echocardiography-with-tissue-doppler-in-systemic-sclerosis
#7
Marina Carneiro de Freitas Roque, Percival D Sampaio-Barros, Ana Lucia Arruda, Sergio Barros-Gomes, Derly Becker, José Lazaro de Andrade, Ana Clara Tude Rodrigues
BACKGROUND: Systemic sclerosis (SS) is a connective tissue abnormality characterized by fibrosis of the skin and internal organs. Cardiac involvement with consequent myocardial dysfunction in SS is associated with increased morbidity and mortality. OBJECTIVE: To investigate the left ventricular (LV) diastolic function in patients with SS and preserved systolic function. METHODS: Patients with SS were evaluated with two-dimensional echocardiography with tissue Doppler for analysis of chamber diameters, LV mass index (LVMI), indexed left atrial volume (iLAV), systolic function of both ventricles, and presence and degree of diastolic dysfunction (DD)...
October 2, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28964164/sensitivity-of-reentrant-driver-localization-to-electrophysiological-parameter-variability-in-image-based-computational-models-of-persistent-atrial-fibrillation-sustained-by-a-fibrotic-substrate
#8
Dongdong Deng, Michael J Murphy, Joe B Hakim, William H Franceschi, Sohail Zahid, Farhad Pashakhanloo, Natalia A Trayanova, Patrick M Boyle
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, causing morbidity and mortality in millions worldwide. The atria of patients with persistent AF (PsAF) are characterized by the presence of extensive and distributed atrial fibrosis, which facilitates the formation of persistent reentrant drivers (RDs, i.e., spiral waves), which promote fibrillatory activity. Targeted catheter ablation of RD-harboring tissues has shown promise as a clinical treatment for PsAF, but the outcomes remain sub-par...
September 2017: Chaos
https://www.readbyqxmd.com/read/28948002/linking-atrial-fibrillation-with-non-alcoholic-fatty-liver-disease-potential-common-therapeutic-targets
#9
REVIEW
Ya-Hui Ding, Yuan Ma, Lin-Yan Qian, Qiang Xu, Li-Hong Wang, Dong-Sheng Huang, Hai Zou
Non-alcoholic fatty liver disease (NAFLD) and atrial fibrillation (AF) are common chronic non-infectious diseases with rising incidences. NAFLD is an independent risk factor for the onset of AF, after adjusting potentially related factors. The pathogenesis of these diseases share several mechanisms including reduced adiponectin level, insulin resistance, and renin angiotensin aldosterone system (RAAS) activation, in addition to activation of common disease pathways that promote inflammation, oxidative stress, and fibrosis...
September 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28942872/association-of-sst2-and-hs-crp-levels-with-new-onset-atrial-fibrillation-in-coronary-artery-disease
#10
Santeri Nortamo, Olavi Ukkola, Samuli Lepojärvi, Tuomas Kenttä, Antti Kiviniemi, Juhani Junttila, Heikki Huikuri, Juha Perkiömäki
BACKGROUND: The data on biomarkers as predictors of atrial fibrillation (AF) in patients with coronary artery disease (CAD) are limited. METHODS: A total of 1946 patients with CAD were recruited to the ARTEMIS study. At baseline, the study patients underwent clinical and echocardiographic examinations and had laboratory tests. The patients (n=1710) with the information about the occurrence of new-onset AF during the follow-up were included in the present analysis...
December 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28940541/ebstein-anomaly-and-sudden-childhood-death
#11
Amanda Freeman, Roger W Byard
A 13-year-old girl is reported who died suddenly and unexpectedly in her sleep from previously undiagnosed Ebstein anomaly. At autopsy, there was dilatation of the right atrium with marked dilatation of the right auricle and apical displacement of the tricuspid valve into the right ventricular cavity with atrialization of the upper portion of the right ventricle. There were also prominent dysplastic changes in both the septal and posterior leaflets of the tricuspid valve with thickening of the valve and fusion of leaflets to the wall of the ventricle...
September 20, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28939175/fragmented-qrs-may-predict-new-onset-atrial-fibrillation-in-patients-with-st-segment-elevation-myocardial-infarction
#12
Mahmut Yesin, Macit Kalçık, Metin Çağdaş, Yavuz Karabağ, İbrahim Rencüzoğulları, Mustafa Ozan Gürsoy, Süleyman Çağan Efe, Süleyman Karakoyun
BACKGROUND: Fragmented QRS (fQRS) has been shown to be a marker of local myocardial conduction abnormalities, cardiac fibrosis in previous studies. It was also reported to be a predictor of sudden cardiac death and increased morbidity and mortality in selected populations. However, there is no study investigating the role of fQRS in the development of atrial fibrillation in patients with ST segment elevation myocardial infarction (STEMI). In this study we aimed to investigate the relationship between the presence of fQRS after primary percutaneous coronary intervention (pPCI) and in-hospital development of new-onset atrial fibrilation (AF) in patients with STEMI...
August 15, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28938960/galectin-3-and-incidence-of-atrial-fibrillation-the-atherosclerosis-risk-in-communities-aric-study
#13
MULTICENTER STUDY
Oluwaseun E Fashanu, Faye L Norby, David Aguilar, Christie M Ballantyne, Ron C Hoogeveen, Lin Y Chen, Elsayed Z Soliman, Alvaro Alonso, Aaron R Folsom
BACKGROUND: Galectin-3, a β-galactoside binding lectin involved in important regulatory roles in adhesion, inflammation, immunity, and fibrosis, may be relevant to atrial fibrillation (AF) etiology. METHODS: We included 8,436 participants free of AF at baseline (1996-1998) and with measures of plasma galectin-3 from the Atherosclerosis Risk in Communities study. We ascertained incident AF through 2013 from study visit electrocardiograms, hospitalizations, and death certificates...
October 2017: American Heart Journal
https://www.readbyqxmd.com/read/28938531/premature-senescence-of-cardiac-fibroblasts-and-atrial-fibrosis-in-patients-with-atrial-fibrillation
#14
Jun Xie, Yuhan Chen, Chuanxian Hu, Quanhua Pan, Bingjian Wang, Xueling Li, Jin Geng, Biao Xu
Premature senescence is associated with atrial fibrosis and has an antifibrotic effect in mice. However, the role of senescence in atrial fibrillation (AF) remains unclear. Here, we investigated the association of premature senescence with fibrosis and also determined the role of senescence in the recurrence of AF after surgery ablation. Western blot, Sirius red staining, SA-β-gal staining and immunohistochemistry were performed to detect the degree of atrial fibrosis ,the expression of TGF-β and collagens, and also the senescence markers in 72 tissue specimens of left atrial appendage in this study...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28935953/very-low-density-lipoprotein-of-metabolic-syndrome-modulates-gap-junctions-and-slows-cardiac-conduction
#15
Hsiang-Chun Lee, Chih-Chieh Chen, Wei-Chung Tsai, Hsin-Ting Lin, Yi-Lin Shiao, Sheng-Hsiung Sheu, Bin-Nan Wu, Chu-Huang Chen, Wen-Ter Lai
Very-low-density lipoproteins (VLDL) is a hallmark of metabolic syndrome (MetS) and each manifestation of MetS is related to atrial fibrillation (AF) risks. Slowed atrial conduction is a mechanism of AF in MetS. We hypothesized that VLDL can modulate and reduce atrial gap junctions. VLDLs were separated from normal (Normal-VLDL) and MetS (MetS-VLDL) individuals. VLDLs (15 µg/g) and equivalent volumes of saline (CTL) were injected respectively to C57BL/6 mice for 6 weeks. Electrocardiograms demonstrated that MetS-VLDL induced prolongation of P wave (P = 0...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28930153/selective-hdl-raising-human-apo-a-i-gene-therapy-counteracts-cardiac-hypertrophy-reduces-myocardial-fibrosis-and-improves-cardiac-function-in-mice-with-chronic-pressure-overload
#16
Ruhul Amin, Ilayaraja Muthuramu, Joseph Pierre Aboumsallem, Mudit Mishra, Frank Jacobs, Bart De Geest
Epidemiological studies support an independent inverse association between high-density lipoprotein (HDL) cholesterol levels and heart failure incidence. The effect of selective HDL-raising adeno-associated viral serotype 8-human apolipoprotein (apo) A-I (AAV8-A-I) gene transfer on cardiac remodeling induced by transverse aortic constriction (TAC) was evaluated in C57BL/6 low-density lipoprotein receptor-deficient mice. Septal wall thickness and cardiomyocyte cross-sectional area were reduced by 16.5% (p < 0...
September 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28925871/biomarkers-associated-with-atrial-fibrosis-and-remodeling
#17
Polychronis Dilaveris, Christos-Konstantinos Antoniou, Panagiota Manolakou, Eleftherios Tsiamis, Konstantinos Gatzoulis, Dimitris Tousoulis
Atrial fibrillation is the most common rhythm disturbance encountered in clinical practice. Although often considered as solely arrhythmic in nature, current evidence has established that atrial myopathy constitutes both the substrate and the outcome of atrial fibrillation, thus initiating a vicious, self-perpetuating cycle. This myopathy is triggered by stress-induced (including pressure/volume overload, inflammation, oxidative stress) responses of atrial tissue, which in the long term become maladaptive, and combines elements of both structural, especially fibrosis, and electrical remodeling, with contemporary approaches yielding potentially useful biomarkers of these processes...
September 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28919580/concomitant-obesity-and-metabolic-syndrome-add-to-the-atrial-arrhythmogenic-phenotype-in-male-hypertensive-rats
#18
Mathias Hohl, Dennis H Lau, Andreas Müller, Adrian D Elliott, Benedikt Linz, Rajiv Mahajan, Jeroen M L Hendriks, Michael Böhm, Ulrich Schotten, Prashanthan Sanders, Dominik Linz
BACKGROUND: Besides hypertension, obesity and the metabolic syndrome have recently emerged as risk factors for atrial fibrillation. This study sought to delineate the development of an arrhythmogenic substrate for atrial fibrillation in hypertension with and without concomitant obesity and metabolic syndrome. METHODS AND RESULTS: We compared obese spontaneously hypertensive rats (SHR-obese, n=7-10) with lean hypertensive controls (SHR-lean, n=7-10) and normotensive rats (n=7-10)...
September 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28912181/hypertrophic-cardiomyopathy-genetics-pathogenesis-clinical-manifestations-diagnosis-and-therapy
#19
REVIEW
Ali J Marian, Eugene Braunwald
Hypertrophic cardiomyopathy (HCM) is a genetic disorder that is characterized by left ventricular hypertrophy unexplained by secondary causes and a nondilated left ventricle with preserved or increased ejection fraction. It is commonly asymmetrical with the most severe hypertrophy involving the basal interventricular septum. Left ventricular outflow tract obstruction is present at rest in about one third of the patients and can be provoked in another third. The histological features of HCM include myocyte hypertrophy and disarray, as well as interstitial fibrosis...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28906536/endomyocardial-fibrosis-in-sudan-clinical-and-echocardiographic-features
#20
Siddiq Ibrahim Khalil, Suha Khalil, Salma El Tigani, Hanan A Saad
OBJECTIVE: Endomyocardial fibrosis (EMF) is a rare disease and is often an underdiagnosed and forgotten cardiomyopathy. The objective of this study was to document the current frequency of EMF in Sudan by defining and selecting cases from patients attending the echocardiography laboratory. Additionally we aimed to create an EMF registry for Sudan. METHODS: The study started in January 2007 and is on-going. All the patients attending our echocardiography clinics in four different hospitals in Khartoum, Sudan, were included...
July 2017: Cardiovascular Journal of Africa
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