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https://www.readbyqxmd.com/read/28807377/crem-transgene-mice-an-animal-model-of-atrial-fibrillation-and-thrombogenesis
#1
A Bukowska, M Felgendreher, B Scholz, C Wolke, J S Schulte, E Fehrmann, E Wardelmann, M D Seidl, U Lendeckel, K Himmler, A Gardemann, A Goette, F U Müller
BACKGROUND: The molecular pathomechanisms underlying atrial thrombogenesis are multifactorial and still require detailed investigations. Transgenic mice with cardiomyocyte-directed expression of the transcriptional repressor CREM-IbΔC-X (CREM-TG) represent an experimental model of atrial fibrillation (AF) that shows a gradual, age-dependent progression from atrial ectopy to persistent AF. Importantly, this model develops biatrial thrombi. The molecular characteristics related to the thrombogenesis in CREM-TG mice have not been studied, yet...
August 1, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28794084/mechanically-induced-ectopy-via-stretch-activated-cation-nonselective-channels-is-caused-by-local-tissue-deformation-and-results-in-ventricular-fibrillation-if-triggered-on-the-repolarization-wave-edge-commotio-cordis
#2
T Alexander Quinn, Honghua Jin, Peter Lee, Peter Kohl
BACKGROUND: External chest impacts (commotio cordis) can cause mechanically induced premature ventricular excitation (PVEM) and, rarely, ventricular fibrillation (VF). Because block of stretch-sensitive ATP-inactivated potassium channels curtailed VF occurrence in a porcine model of commotio cordis, VF has been suggested to arise from abnormal repolarization caused by stretch activation of potassium channels. Alternatively, VF could result from abnormal excitation by PVEM, overlapping with normal repolarization-related electric heterogeneity...
August 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28791747/ecg-morphology-of-premature-ventricular-contractions-predicts-presence-of-myocardial-fibrotic-substrate-on-cardiac-magnetic-resonance-imaging-in-patients-undergoing-ablation
#3
Sabrina Oebel, Borislav Dinov, Arash Arya, Sebastian Hilbert, Philipp Sommer, Andreas Bollmann, Gerhard Hindricks, Ingo Paetsch, Cosima Jahnke
BACKGROUND: The most likely origin of PVCs may be deduced from surface ECG analysis while planning an electrophysiological study (EPS). Apart from purely benign forms of increased ventricular ectopy, myocardial substrate (e.g., regional fibrosis) may be present in certain cases, which will significantly impact the ablation approach. CMR imaging can reliably identify fibrotic target lesions and, hence, may assist in adequate patient selection and procedural planning. METHODS AND RESULTS: We analyzed 101 patients (59% male, mean age 57...
August 9, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28782742/laparoscopic-management-of-m%C3%A3-llerian-duct-remnants-in-the-paediatric-age-evidence-and-outcome-analysis
#4
Maja Raicevic, Amulya Kumar Saxena
BACKGROUND: This study performed a literature analysis to determine outcomes of laparoscopic management in Müllerian duct remnants (MDRs). PATIENTS AND METHODS: Literature was searched for terms 'Müllerian' 'duct' 'remnants' and 'laparoscopy'. Primary end points were age at surgery, laparoscopic technique, intraoperative complications and postoperative morbidity. RESULTS: The search revealed 10 articles (2003-2014) and included 23 patients with mean age of 1...
August 1, 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28775064/ectopy-on-a-single-12-lead-ecg-incident-cardiac-myopathy-and-death-in-the-community
#5
Kaylin T Nguyen, Eric Vittinghoff, Thomas A Dewland, Jonathan W Dukes, Elsayed Z Soliman, Phyllis K Stein, John S Gottdiener, Alvaro Alonso, Lin Y Chen, Bruce M Psaty, Susan R Heckbert, Gregory M Marcus
BACKGROUND: Atrial fibrillation and heart failure are 2 of the most common diseases, yet ready means to identify individuals at risk are lacking. The 12-lead ECG is one of the most accessible tests in medicine. Our objective was to determine whether a premature atrial contraction observed on a standard 12-lead ECG would predict atrial fibrillation and mortality and whether a premature ventricular contraction would predict heart failure and mortality. METHODS AND RESULTS: We utilized the CHS (Cardiovascular Health) Study, which followed 5577 participants for a median of 12 years, as the primary cohort...
August 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28752278/predictors-and-therapy-of-cardiomyopathy-caused-by-frequent-ventricular-ectopy
#6
REVIEW
Ghaith Sharaf Dabbagh, Frank Bogun
PURPOSE OF REVIEW: The aim of this review is to describe predictors and therapeutic principles for PVC-induced cardiomyopathy. RECENT FINDINGS: PVC-induced cardiomyopathy is a treatable condition resulting in a reversible form of cardiomyopathy. PVC-induced cardiomyopathy has only recently been recognized as an entity that causes a reversible form of cardiomyopathy. The mechanism of development of PVC-induced cardiomyopathy has not yet been elucidated, although dyssynchrony appears to play a major role...
September 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28739617/paediatric-chest-wall-trauma-causing-delayed-presentation-of-ventricular-arrhythmia
#7
Angela M Tegethoff, Emerald Raney, Jenny Mendelson, Michael R Minckler
This report describes a paediatric patient presenting with haemodynamically stable non-sustained ventricular tachycardia 1 day after minor blunt chest trauma. Initial laboratory studies, chest X-ray and echocardiography were normal; however, cardiac MRI revealed precordial haematoma, myocardial contusion and small pericardial effusion. Throughout her hospital course, she remained asymptomatic aside from frequent couplets and triplets of premature ventricular contractions. Ectopy was controlled with oral verapamil...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28712522/comparison-of-the-origin-and-coupling-interval-between-ectopy-with-and-without-atrial-fibrillation-initiation
#8
Takashi Kanda, Masaharu Masuda, Masashi Fujita, Osamu Iida, Shin Okamoto, Takayuki Ishihara, Kiyonori Nanto, Akihiro Sunaga, Takuya Tsujimura, Yasuhiro Matsuda, Takuya Ohashi, Masaaki Uematsu
BACKGROUND: Differentiation of atrial fibrillation (AF) trigger ectopy from other ectopy is often difficult. The purpose of this study was to compare the origin and coupling intervals (CI) between AF-trigger and non-AF-trigger ectopy. METHODS: This study consisted of 120 patients with AF who underwent an initial ablation. Isoproterenol was infused up to 20μg/min to provoke ectopy and AF. We measured the CI of all ectopy provoked by an isoproterenol infusion. The %CI was calculated as the CI of the ectopy/P-P interval of the preceding 2 beats...
July 13, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28705875/electrical-and-structural-substrate-of-arrhythmogenic-right-ventricular-cardiomyopathy-determined-using-noninvasive-electrocardiographic-imaging-and-late-gadolinium-magnetic-resonance-imaging
#9
Christopher M Andrews, Neil T Srinivasan, Stefania Rosmini, Heerajnarain Bulluck, Michele Orini, Sharon Jenkins, Antonis Pantazis, William J McKenna, James C Moon, Pier D Lambiase, Yoram Rudy
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a significant cause of sudden cardiac death in the young. Improved noninvasive assessment of ARVC and better understanding of the disease substrate are important for improving patient outcomes. METHODS AND RESULTS: We studied 20 genotyped ARVC patients with a broad spectrum of disease using electrocardiographic imaging (a method for noninvasive cardiac electrophysiology mapping) and advanced late gadolinium enhancement cardiac magnetic resonance scar imaging...
July 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28705548/age-dependent-ventricular-arrhythmias-risk-structural-and-molecular-remodeling-in-systemic-arterial-hypertension
#10
Alina Scridon, Rosa Doñate Puertas, Waheed Manati, Emmanuelle Fouilloux-Meugnier, Emmanuelle Loizon, Valérie Oréa, Bruno Chapuis, Claude Julien, Christian Barrès, Alain Tabib, Philippe Chevalier
INTRODUCTION: The left ventricular hypertrophy (LVH)-ventricular arrhythmias relationship associated with arterial hypertension and aging remains controversial. We aimed to assess the age-dependency of ventricular arrhythmias in spontaneously hypertensive rats (SHRs) and the corresponding ventricular structural and molecular remodeling. MATERIALS AND METHODS: Ventricular arrhythmias were quantified using 24-h radiotelemetry ECG monitoring in eight SHRs and four Wistar-Kyoto (WKY) rats at 14 (young), 24 (adult), and 48 (aging) weeks of age...
July 10, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28705381/usefulness-of-atrial-premature-complexes-on-routine-electrocardiogram-to-determine-the-risk-of-atrial-fibrillation-from-the-regards-study
#11
Wesley T O'Neal, Hooman Kamel, Suzanne E Judd, Monika M Safford, Viola Vaccarino, Virginia J Howard, George Howard, Elsayed Z Soliman
Atrial premature complexes (APCs) serve as acute triggers for atrial fibrillation (AF), but it is currently unknown whether the association between APCs and AF varies by race or sex. We examined the association between APCs and AF in 13,840 (mean age = 63 ± 8.4 years; 56% women; 37% black) participants from the REasons for Geographic And Racial Differences in Stroke study. APCs were detected on baseline electrocardiograms (2003 to 2007). Incident AF was identified by study-scheduled electrocardiograms and self-reported history at a follow-up examination...
September 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28687188/-oral-and-dental-expression-of-thyroid-diseases
#12
Jean-Louis Wémeau, Christine Do Cao, Miriam Ladsous
Oral disorders were observed in children with congenital hypothyroidism, lately apparent because of difficulties of feeding, swallowing disorders, and macroglossia. Macroglossia was also a component of the severe acquired myxedema, particularly observed in hypothyroidism related to autoimmune atrophic thyroiditis beyond menopause. Lingual ectopy in children and adults could determine respiratory gene or swallowing difficulties, and were detectable by visual examination and the endobuccal touch. Expression of these events was completely minimized since the neonatal screening of congenital hypothyroidism, also by the common practice in adults of serum TSH determinations...
July 4, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28675511/electrophysiological-relation-between-the-superior-vena-cava-and-right-superior-pulmonary-vein-in-patients-with-paroxysmal-atrial-fibrillation
#13
Kentaro Yoshida, Ai Hattori, Hidekazu Tsuneoka, Yasuaki Tsumagari, Yoshiaki Yui, Akira Kimata, Yoko Ito, Mari Ebine, Yoshiko Uehara, Naoya Koda, Masako Misaki, Daisuke Abe, Noriyuki Takeyasu, Kazutaka Aonuma, Akihiko Nogami
INTRODUCTION: The superior vena cava (SVC) is a main source of non-pulmonary vein (PV) ectopies initiating atrial fibrillation (AF). Empiric SVC isolation may improve rhythm outcomes after catheter ablation of AF. Because the SVC passes immediately adjacent to the right superior PV (RSPV), an electrophysiological relation could be present between the two structures. The present study aimed to estimate the interrelation between the SVC and RSPV by evaluating arrhythmogenic activities observed during catheter ablation of AF...
July 4, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28648504/disorders-of-thyroid-morphogenesis
#14
REVIEW
Rasha Abu-Khudir, Stéphanie Larrivée-Vanier, Jonathan D Wasserman, Johnny Deladoëy
Developmental anomalies of the thyroid gland, defined as thyroid dysgenesis, underlie the majority of cases of congenital hypothyroidism. Thyroid dysgenesis is predominantly a sporadic disorder although a reported familial enrichment, variation of incidence by ethnicity and the monogenic defects associated mainly with athyreosis or orthotopic thyroid hypoplasia, suggest a genetic contribution. Of note, the most common developmental anomaly, thyroid ectopy, remains unexplained. Ectopy may result from multiple genetic or epigenetic variants in the germline and/or at the somatic level...
March 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28598178/multidisciplinary-approach-to-the-treatment-of-double-bilateral-upper-permanent-incisors-in-a-young-boy
#15
G F Ferrazzano, P Festa, T Cantile, V D'Antò, A Ingenito, R Martina
BACKGROUND: A double tooth is a rare developmental anomaly referring to the fusion of two adjacent tooth buds or the gemination of a single bud. CASE REPORT: This case report describes the multidisciplinary approach to an 11-year-old patient with two double upper permanent incisors. The clinical intraoral examination showed a mixed dentition with bilateral double maxillary central incisors, molar Class I malocclusion and palatal ectopy of two lateral upper incisors...
June 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28579517/early-regional-wall-distension-is-strongly-associated-with-vulnerability-to-ventricular-fibrillation-but-not-arrhythmia-triggers-following-coronary-occlusion-in-vivo
#16
José A Barrabés, Javier Inserte, Antonio Rodríguez-Sinovas, Marisol Ruiz-Meana, David Garcia-Dorado
Wall stress may favor ischemic ventricular arrhythmias, yet its association with ventricular fibrillation (VF) or ventricular ectopy has been inconsistent among studies and its potential arrhythmogenicity across the cardiac cycle is unclear. In 91 open-chest pigs undergoing 40-50 min left anterior descending artery occlusion, we assessed the association between diastolic or systolic distension of the ischemic area and the incidence of ventricular premature beats (VPBs) and VF. End-diastolic segment length (EDL) and systolic bulging ([maximum systolic length-EDL] × 100/EDL) were measured by ultrasonic crystals...
June 1, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28575293/clinical-value-of-induction-protocol-after-second-generation-cryoballoon-ablation-for-paroxysmal-atrial-fibrillation
#17
Vedran Velagic, Erwin Ströker, Carlo de Asmundis, Giacomo Mugnai, Saverio Iacopino, Valentina de Regibus, Juan-Pablo Abugattas, Hugo-Enrique Coutiño, Ken Takarada, Rajin Choudhury, Gaetano Paparella, Yves De Greef, Pedro Brugada, Gian-Battista Chierchia
Aims: The predictive value of induction studies after catheter ablation for atrial fibrillation (AF) is still debatable. To date, these studies have not been implemented in patients after cryoballoon (CB) ablation. Our aim was to analyse the clinical value of AF induction in patients treated by second generation CB for paroxysmal AF. Methods and results: Seventy patients underwent at first an isoproterenol challenge after pulmonary vein (PV) isolation to assess AF induction and early PV reconnections (EPVR)...
May 31, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28534047/polysomnographic-heart-rate-variability-indices-and-atrial-ectopy-associated-with-incident-atrial-fibrillation-risk-in-older-community-dwelling-men
#18
Dileep Raman, Farhad Kaffashi, Li-Yung Lui, William H Sauer, Susan Redline, Peter Stone, Peggy M Cawthon, Katie L Stone, Kristine E Ensrud, Sonia Ancoli-Israel, Kenneth Loparo, Reena Mehra
BACKGROUND: Autonomic dysfunction contributes to atrial fibrillation (AF). OBJECTIVE: We hypothesized that polysomnogram (PSG)-based heart rate variability (HRV) autonomic function biomarkers are associated with incident AF and these associations are modified by measures of sleep disordered breathing (SDB). METHODS: 2350 participants of a multi-center prospective study (Outcomes of Sleep Disorders in Older Men Study) without baseline AF underwent sleep studies with incident adjudicated AF follow up (8...
May 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/28523220/cardiovascular-risk-factors-in-chiari-malformation-and-idiopathic-intracranial-hypertension
#19
Radek Frič, Are Hugo Pripp, Per Kristian Eide
OBJECTIVES: Both Chiari malformation type 1 (CMI, i.e., the idiopathic caudal ectopy of cerebellar tonsils into foramen magnum) and idiopathic intracranial hypertension (IIH) are characterized by reduced intracranial compliance (ICC) due to disturbed circulation of cerebrospinal fluid (CSF). An increasing body of evidence links cardiovascular disease to CSF circulation disturbances. The aim of this study was to explore whether the prevalence of cardiovascular risk factors in patients with CMI or IIH is higher than in the general population...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28495433/ventricular-and-supraventricular-ectopy-in-subjects-with-early-repolarization
#20
MULTICENTER STUDY
Teresa Trenkwalder, Ryan King, Bernhard M Kaess, Christian Hengstenberg, Heribert Schunkert, Till Ittermann, Stephan B Felix, Mathias Busch, Marcus Dörr, Wibke Reinhard
Early repolarization (ER) is a common electrocardiographic (ECG) finding that is associated with an increased risk of idiopathic ventricular fibrillation and sudden cardiac death. This study investigated whether the presence of ER is a predictor of ventricular and supraventricular ectopy as a marker for electrical instability. Standard 12-lead electrocardiograms of the first follow-up in the population-based Study of Health in Pomerania (SHIP-1) (n = 3,300, age 20 to 79 years) were analyzed to identify subjects with an ER pattern...
July 1, 2017: American Journal of Cardiology
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