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https://www.readbyqxmd.com/read/29149500/ep-radiofrequency-generators-significant-offsets-between-selected-and-delivered-power
#1
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
#2
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/29148140/haemodynamic-effects-of-an-acute-vasodilator-challenge-in-heart-failure-patients-with-reduced-ejection-fraction-and-different-forms-of-post-capillary-pulmonary-hypertension
#3
Stefano Ghio, Gabriele Crimi, Pier Luigi Temporelli, Egidio Traversi, Maria Teresa La Rovere, Antonia Cannito, Dario Vizza, Laura Scelsi, Claudia Raineri, Marco Guazzi, Luigi Oltrona Visconti
AIMS: The most recent European guidelines have proposed new definitions of pulmonary hypertension (PH) in left heart disease, to better approach the characteristics required to reflect the presence of pulmonary vascular disease. The purpose of this study was to assess whether different haemodynamic definitions of post-capillary PH imply a different reversibility of PH in response to acute vasodilator administration in heart failure patients with reduced ejection fraction and PH (HFrEF-PH)...
November 16, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29148067/should-theophylline-be-added-to-the-j-wave-syndrome-therapeutic-armamentarium
#4
EDITORIAL
Charles Antzelevitch, Sami Viskin
The substrate for both early repolarization syndrome (ERS) and Brugada syndrome (BrS), the so-called J wave syndromes, has been shown to develop as a consequence of genetic variants causing a loss of function of inward currents such sodium (INa ) and calcium (ICa ) channel currents or a gain of function in outward currents such as the transient outward current (Ito ). These changes in ion channel function result in an outward shift of the balance of currents active during the early phases of the epicardial action potential in the right ventricular outflow tract (RVOT) of the heart in the case BrS and in the inferior left ventricle in the case of ERS...
November 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29148065/improvement-in-low-upright-baroreflex-sensitivity-is-associated-with-positive-clinical-effect-of-orthostatic-training
#5
Peter Mitro, Miloš Simurda, Ervin Muller
AIM: To assess the clinical efficacy of orthostatic training (OT) and its effect on the autonomic activity. METHODS: OT was performed in 38 patients (13 males, age 36.4 ± 15.2 years). Baroreflex sensitivity (BRS), heart rate variability and quality of life (SF 36) was assessed before and after 6 months of OT. Patients with no recurrence of syncope and reduction of the presyncope number to one-third or less were classified as responders. RESULTS: Compliance to OT was low...
November 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29147768/non-invasive-methods-for-estimating-mpap-in-copd-using-cardiovascular-magnetic-resonance-imaging
#6
C S Johns, S Rajaram, D A Capener, C Oram, C Elliot, R Condliffe, D G Kiely, J M Wild, A J Swift
PURPOSE: Pulmonary hypertension (PH) is associated with a poor outcome in chronic obstructive pulmonary disease (COPD) and is diagnosed invasively. We aimed to assess the diagnostic accuracy and prognostic value of non-invasive cardiovascular magnetic resonance (CMR) models. METHODS: Patients with COPD and suspected PH, who underwent CMR and right heart catheter (RHC) were identified. Three candidate models were assessed: 1, CMR-RV model, based on right ventricular (RV) mass and interventricular septal angle; 2, CMR PA/RV includes RV mass, septal angle and pulmonary artery (PA) measurements; 3, the Alpha index, based on RV ejection fraction and PA size...
November 16, 2017: European Radiology
https://www.readbyqxmd.com/read/29146623/variations-in-rotation-of-the-aortic-root-and-membranous-septum-with-implications-for-transcatheter-valve-implantation
#7
Justin T Tretter, Shumpei Mori, Farhood Saremi, Sathish Chikkabyrappa, Kristen Thomas, Fang Bu, Rohit S Loomba, Tarek Alsaied, Diane E Spicer, Robert H Anderson
OBJECTIVE: It is intuitive to suggest that knowledge of the variation in the anatomy of the aortic root may influence the outcomes of transcatheter implantation of the aortic valve (TAVI). We have now assessed such variation. METHODS: We used 26 specimens of normal hearts and 78 CT data sets of adults with a mean age of 64±15 years to measure the dimensions of the membranous septum and to assess any influence played by rotation of the aortic root, inferring the relationship to the atrioventricular conduction axis...
November 16, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29146614/heart-rate-reduction-improves-biventricular-function-and-interactions-in-experimental-pulmonary-hypertension
#8
Olga Gomez, Kenichi Okumura, Osami Honjo, Mei Sun, Ryo Ishii, Bart Bijens, Mark K Friedberg
OBJECTIVES: To investigate mechanisms of heart rate (HR) reduction on biventricular function and interactions in experimental pulmonary arterial hypertension (PAH). METHODS: We compared cardiac-cycle mechanics and interventricular interactions in 15 sham, 8 monocrotaline-PAH, 9 PAH+carvedilol and 8 PAH+ivabradine rats. We used echocardiography to assess biventricular function, timing of cardiac- cycle events and septal position in PAH rats; and related HR reduction effect on biventricular function measured by echocardiography and conductance catheter...
November 16, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29146419/syncope-on-presentation-is-a-surrogate-for-submassive-and-massive-acute-pulmonary-embolism
#9
Hesham R Omar, Mehdi Mirsaeidi, Michael B Weinstock, Garett Enten, Devanand Mangar, Enrico M Camporesi
INTRODUCTION: There are conflicting data regarding the prognostic value of syncope in patients with acute pulmonary embolism (APE). METHODS: We retrospectively reviewed data of 552 consecutive adults with computed tomography pulmonary angiogram-confirmed APE to determine the correlates and outcome of the occurrence of syncope at the time of presentation. RESULTS: Among 552 subjects with APE (mean age 54years, 47% men), syncope occurred in 12...
November 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29146416/fulminant-adrenergic-myocarditis-complicated-by-pulmonary-edema-cardiogenic-shock-and-cardiac-arrest
#10
Pawel Rostoff, Bohdan Nessler, Patrycja Pikul, Karolina Golinska-Grzybala, Tomasz Miszalski-Jamka, Jadwiga Nessler
Adrenergic myocarditis is an uncommon presentation of pheochromocytoma and extremely rare cause of de novo acute heart failure (AHF). We present a case of a 31-year-old Caucasian woman with a history of hypertension and recurrent occipital headaches who was admitted to the emergency department due to severe de novo AHF presenting as pulmonary edema and cardiogenic shock. During the hospital admission the patient experienced asystolic cardiac arrest and was successfully resuscitated, intubated, and mechanically ventilated...
November 10, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29145993/an-absorbable-hydrogel-spray-reduces-postoperative-mediastinal-adhesions-after-congenital-heart-surgery
#11
Nahidh Hasaniya, Anees Razzouk, Jennifer Newcombe, Dana Hassneiah, Jessica Heimes, Joshua Gysbers, Timothy Martens, Leonard Bailey
BACKGROUND: Adhesions encountered during reoperative cardiac surgery can prolong operative time and increase operative risk. The purpose of this clinical study was to investigate the antiadhesion property of a synthetic bioabsorbable polymer spray after cardiac reoperations in infants. METHODS: A prospective randomized double-blinded study was designed. Forty infants requiring staged cardiac operations were randomly allocated to a study group (n = 20) or a control group (n = 20)...
November 14, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29145709/defining-a-unified-vascular-phenotype-in-systemic-sclerosis
#12
REVIEW
Yannick Allanore, Oliver Distler, Marco Matucci-Cerinic, Christopher P Denton
Microcirculation impairment and related vasculopathy is a hallmark of systemic sclerosis. Digital ulcers are second only to Raynaud's phenomenon as a vascular complication occurring in scleroderma patients. Digital ulcers are painful and generate disability. Furthermore, patients may develop recurrent digital ulcers and one may ask whether the outcomes of such patients might be different to those of unaffected ones. Recently several registries have provided relevant information about digital ulcers. Male sex and severe skin disease seem to be the main associated factors observed in several registries...
November 16, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29145311/pulmonary-hypertension-as-a-manifestation-of-mitochondrial-disease-a-case-report-and-review-of-the-literature
#13
Shan Xu, Xiaoling Xu, Jisong Zhang, Kejing Ying, Yuquan Shao, Ruifeng Zhang
BACKGROUND: Mitochondrial diseases are a group of multisystem heterogeneous diseases caused by pathologic dysfunction of the mitochondrial respiratory chain. A wide range of clinical expression has been described. However, pulmonary hypertension has rarely been described in association with mitochondrial disease until the past decade, and there is no currently recognized treatment for the pulmonary hypertension complicated with mitochondrial disorder. PATIENT CONCERNS: We reported the case of a 15-year-old boy who presented with shortness of breath and exercise limitation after a cold, and the diagnosis of pulmonary hypertension was confirmed by right heart catheter...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145303/epicardial-radiofrequency-catheter-ablation-of-brugada-syndrome-with-electrical-storm-during-ventricular-fibrillation-a-case-report
#14
Shufen Jiang, Xiaomeng Yin, Chang Dong, Yunlong Xia, Jinqiu Liu
RATIONALE: Brugada syndrome (BrS) is characterized by ST segment elevation at the J point ≥2 mm in the right precordial electrocardiogram (ECG) leads, in the absence of structural heart disease, electrolyte disturbances, or ischemia. It is a well-described cause of sudden death in young patients, especially in the age of between 30 and 40 years old. Here, we reported an unusual case of electrical storm (ES) of ventricular fibrillation (VF) caused by BrS with complete right bundle-branch block (CRBBB) in a 75-year-old male patient...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145282/autosomal-dominant-polycystic-kidney-disease-combined-with-hypertrophic-cardiomyopathy-a-case-report
#15
Yingjing Shen, Chenggang Xu
INTRODUCTION: This report describes the novel sampling of autosomal dominant polycystic kidney disease (ADPKD) combined with hypertrophic cardiomyopathy (HCM). SYMPTOMS AND CLINICAL FINDINGS: A 48-year-old Chinese man presented with anasarca, hypourocrinia, gross hematuria, and weight gain by 10 kg subsequently developed acute kidney injury after struck by acute respiratory distress syndrome, really a threat to his heart. DIAGNOSES: Abdominal ultrasound revealed multiple small cysts in both kidneys, with the right kidney measuring 11...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145264/influences-of-cardiac-motion-on-computed-tomography-guided-biopsy-of-lung-nodules-located-near-the-heart
#16
Li-Sheng Hsu, Chien-Wei Chen, Chia-Hao Chang, Chien-Han Liao, Sheng-Lung Hsu, Wei-Ming Lin
Computed tomography (CT)-guided lung biopsy of nodules located near the heart may be associated with potential complications. To understand the influences of cardiac motion on lung parenchyma during biopsy, we processed the cardiac phase images of coronary CT angiography (CCTA) and noticed shifts in mediastinum lung margin (MLM) at different zones.Thirty eight CCTA (27 men and 11 women) were retrospectively evaluated. Image processing was done with Fiji (an open source Java image processing program by Fiji contributors) using 10% to 90% phase images of CCTA; and tissue displacement (MLM shift) was shown on the resulting images...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144532/is-there-a-role-for-combination-anti-remodelling-therapy-for-heart-failure-secondary-to-chronic-rheumatic-mitral-regurgitation
#17
Ruchika Meel, Ferande Peters, Elena Libhaber, Mohammed R Essop
INTRODUCTION: The value of combination anti-remodelling therapy for heart failure (HF) secondary to mitral regurgitation (MR) is unknown. We studied the effect of anti-remodelling therapy on clinical and echocardiographic parameters in patients with severe chronic rheumatic mitral regurgitation (CRMR) presenting in HF. METHODS: Thirty-one patients (29 females) at Chris Hani Baragwanath Academic Hospital, treated with combination therapy for HF due to CRMR and New York Heart Association functional class II-III symptoms, underwent prospective six-month follow up...
September 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/29144001/biological-evaluation-and-energetic-analyses-of-novel-gsk-3%C3%AE-inhibitors
#18
Denan Zhang, Lei Liu, Lin Pang, Qing Jin, Kehui Ke, Ming Hu, Jingbo Yang, Weifang Ma, Hongbo Xie, Xiujie Chen
Glycogen synthase kinase-3 beta (GSK-3β) is involved in multiple signaling pathways. Consistent with its critical roles in normal cells, abnormalities in GSK-3β activity have been implicated in diabetes, heart disease, Parkinson disease and Alzheimer's disease. In this study, a series of new scaffolds of small molecule inhibitors of GSK-3β were identified by virtual screening and bioassay. Candidates that adhere to drug-like criteria from a virtual library of compounds were tested using computational docking studies...
November 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29143975/sustained-cardiac-programming-by-short-term-juvenile-exercise-training-in-male-rats
#19
Y Asif, M E Wlodek, M J Black, A P Russell, P F Soeding, G D Wadley
The aim of this study was to investigate if endurance training during juvenile life 'reprograms' the heart and leads to sustained improvements in the structure, function, and morphology of the adult heart. Male Wistar Kyoto rats were exercise trained 5 days/week for four weeks in either juvenile (5-9 weeks of age), adolescent (11-15 weeks of age) or adult life (20-24 weeks of age). Juvenile exercise training, when compared to 24 week old sedentary rats, led to sustained increases in left ventricle (LV) mass (+18%; P < 0...
November 16, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29143810/next-generation-pacemakers-from-small-devices-to-biological-pacemakers
#20
REVIEW
Eugenio Cingolani, Joshua I Goldhaber, Eduardo Marbán
Electrogenesis in the heart begins in the sinoatrial node and proceeds down the conduction system to originate the heartbeat. Conduction system disorders lead to slow heart rates that are insufficient to support the circulation, necessitating implantation of electronic pacemakers. The typical electronic pacemaker consists of a subcutaneous generator and battery module attached to one or more endocardial leads. New leadless pacemakers can be implanted directly into the right ventricular apex, providing single-chamber pacing without a subcutaneous generator...
November 16, 2017: Nature Reviews. Cardiology
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