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https://www.readbyqxmd.com/read/29925094/wearable-cardioverter-defibrillators-following-cardiac-surgery-a-single-center-experience
#1
Jan Heimeshoff, Constanze Merz, Marcel Ricklefs, Felix Kirchhoff, Axel Haverich, Christoph Bara, Christian Kühn
BACKGROUND:  A wearable cardioverter-defibrillator (WCD) can terminate ventricular fibrillation and ventricular tachycardias via electrical shock and thus give transient protection from sudden cardiac death. We investigated its role after cardiac surgery. METHODS:  We retrospectively analyzed all patients who were discharged with a WCD from cardiac surgery department. The WCD was prescribed for patients with a left ventricular ejection fraction (LVEF) of ≤35% or an explanted implantable cardioverter-defibrillator (ICD)...
June 20, 2018: Thoracic and Cardiovascular Surgeon
https://www.readbyqxmd.com/read/29924786/-risk-factors-for-the-development-of-life-threatening-ventricular-arrhythmias-following-surgical-reconstruction-of-the-left-ventricle
#2
E V Rosseĭkin, E E Kobzev, O V Popyl'kova, S S Durmanov, V V Bazylev
Death in patients with postinfarction aneurysms of the left ventricle (LV) is mainly caused by life-threatening ventricular arrhythmias - ventricular tachycardias (VTs) and ventricular fibrillations (VFs). Surgical reconstruction of the LV may potentially lead to disruption of the re-entry mechanism, lying at the basis of ventricular tachyarrhythmias. A series of authors demonstrated high efficacy of such procedures as endocardectomy and radiofrequency ablation of the borderline zone of the LV. But high incidence of relapses, difficulty detecting the localization of VT and performing radiofrequency ablation (RFA), as well as high incidence of spontaneous and induced VTs in patients with postinfarction aneurysms of the LV have preserved dissatisfaction with the currently existing techniques...
2018: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29923993/catheter-radiofrequency-ablation-for-arrhythmias-under-the-guidance-of-the-carto-3-three-dimensional-mapping-system-in-an-operating-room-without-digital-subtraction-angiography
#3
Xingfu Huang, Yanjia Chen, Zheng Huang, Liwei He, Shenrong Liu, Xiaojiang Deng, Yongsheng Wang, Rucheng Li, Dingli Xu, Jian Peng
Several studies have reported the efficacy of a zero-fluoroscopy approach for catheter radiofrequency ablation of arrhythmias in a digital subtraction angiography (DSA) room. However, no reports are available on the ablation of arrhythmias in the absence of DSA in the operating room. To investigate the efficacy and safety of catheter radiofrequency ablation for arrhythmias under the guidance of a Carto 3 three-dimensional (3D) mapping system in an operating room without DSA. Patients were enrolled according to the type of arrhythmia...
June 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29922027/large-nonapical-right-ventricular-diverticulum-in-a-patient-with-atrioventricular-septal-defect
#4
Michael Weidenbach, Bardo Wannenmacher, Christian Paech, Robert Wagner
Congenital diveticula and aneurysm of the heart are rare and most often located at the apex of the left ventricle. They pose a significant risk for cardiac failure and arrhythmias. In contrast, nonapical diverticula of the right ventricle (RV) have a much more benign course. We present a child with Trisomy 21, atrioventricular septal defect, and large nonapical diverticulum of the RV that was neither addressed during surgery nor needed any medical treatment during 1-year follow-up.
May 2018: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/29922026/t-wave-alternans-in-long-qt-syndrome
#5
Siddharth Narayan Gadage
Long QT syndrome (LQTS) is a congenital disorder characterized by prolongation of QT interval in the electrocardiogram (ECG) and a propensity to develop ventricular arrhythmias, which may lead to syncope, cardiac arrest or sudden death. T-wave alternans (TWA), a phenomenon of beat-to-beat variability in the repolarization phase of the ventricles, has been closely associated with an increased risk of ventricular tachyarrhythmic events (VTE) and sudden cardiac death (SCD).
May 2018: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/29922012/fetal-cardiac-arrhythmias-current-evidence
#6
REVIEW
Nathalie Jeanne Bravo-Valenzuela, Luciane Alves Rocha, Luciano Marcondes Machado Nardozza, Edward Araujo Júnior
This article reviews important features for improving the diagnosis of fetal arrhythmias by ultrasound in prenatal cardiac screening and echocardiography. Transient fetal arrhythmias are more common than persistent fetal arrhythmias. However, persistent severe bradycardia and sustained tachycardia may cause fetal hydrops, preterm delivery, and higher perinatal morbidity and mortality. Hence, the diagnosis of these arrhythmias during the routine obstetric ultrasound, before the progression to hydrops, is crucial and represents a challenge that involves a team of specialists and subspecialists on fetal ultrasonography...
May 2018: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/29920724/afterdepolarizations-and-triggered-activity-as-a-mechanism-for-clinical-arrhythmias
#7
REVIEW
Andrew L Wit
Afterdepolarizations cause triggered arrhythmias. One kind occurs after repolarization is complete, delayed afterdepolarizations (DADs). Another occurs as an interruption in repolarization, early afterdepolarizations (EADs). Afterdepolarizations initiate arrhythmias when they depolarize membrane potential to threshold potential for triggering action potentials. DADs usually occur mostly when Ca2+ in the sarcoplasmic reticulum (SR) is elevated. The SR leaks some of the Ca2+ into the myoplasm through Ca2+ release channels controlled by ryanodine receptors (RyR2) during diastole...
June 19, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29920162/the-relation-of-blood-lead-and-qrs-t-angle-in-american-adults
#8
Jin Jing, Susan Thapa, Leanna Delhey, Saly Abouelenein, Wesam Morad, Robert Delongchamp, Mohammed F Faramawi
The QRS-T angle is a key ECG predictor for ventricular arrhythmia. Lead has a strong relation with cardiovascular diseases; however, no study has been conducted to investigate the association between lead exposure and QRS-T angle. Thus, we explored this association in a population-based representative sample: NHANES III. We used the standard 12-lead ECGs to calculate Spatial QRS-T angles. Blood lead concentrations were measured using graphite furnace atomic absorption spectrophotometry method. We conducted multivariate weighted logistic regression to adjust for impaired fasting glucose, hypertension, poverty index, age, race, and smoking status...
June 19, 2018: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/29917280/protective-effects-of-cinnamon-bark-extract-against-ischemia-reperfusion-injury-and-arrhythmias-in-rat
#9
Mehrnoosh Sedighi, Afshin Nazari, Mahdieh Faghihi, Mahmoud Rafieian-Kopaei, Arash Karimi, Maryam Moghimian, Seyyed Ali Mozaffarpur, Marzieh Rashidipour, Mehrdad Namdari, Mostafa Cheraghi, Bahram Rasoulian
Cinnamomum zeylanicum (cinnamon) is a plant with potent antioxidant activity and has been used in traditional medicine for improvement of heart function. The effects of cinnamon bark ethanolic extract were investigated against ischemia-induced arrhythmias and heart injury in an in vivo rat model of regional heart ischemia. The extract was also standardized, and its antioxidant activity was evaluated. Adult male Sprague-Dawley rats were subjected to 30 min of ischemia by occlusion of the left anterior descending coronary artery followed by 5 days of reperfusion...
June 19, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29915716/mitral-valve-repair-results-in-suppression-of-ventricular-arrhythmias-and-normalization-of-repolarization-abnormalities-in-mitral-valve-prolapse
#10
Wael Alqarawi, David H Birnie, Ian G Burwash
No abstract text is available yet for this article.
May 2018: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/29915644/right-ventricular-dysplasia-management-and-treatment-in-light-of-current-evidence
#11
REVIEW
Amr Idris, Syed Raza Shah, Ki Park
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a rare cardiovascular disease that predisposes to ventricular arrhythmias potentially leading to sudden cardiac death (SCD). ARVC varies considerably with multiple clinical presentations, ranging from no symptoms to cardiac arrhythmias to SCD. ARVC prevalence is not well known, but the estimated prevalence in the general population is 1:5000. Diagnosis of ARVC can be made by using the Revised European Society of Cardiology criteria for ARVC that includes ventricular structural and functional changes, ECG abnormalities, arrhythmias, family and genetic factors...
2018: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/29914305/early-detection-strain-strain-rate-and-time-to-strain-strain-rate-abnormalities-for-left-atrial-mechanical-function-in-hypertensive-patients
#12
Ahmet Karakurt, Cennet Yildiz, Abdülmelik Yildiz, Yavuz Karabağ, Metin Çağdaş, İbrahim Rencüzoğulları, İnanç Artaç, Doğan İliş
OBJECTIVE: To evaluate left atrial (LA) deformation parameters strain (S)/strain rate (SR) and time to peak S/SR obtained by two-dimensional speckle tracking echocardiography (2D-STE) in patients with hypertension for three LA mechanical phases and to compare them with the same indices in the control subjects. METHODS: Fifty-five patients with hypertension (HT) and 29 healthy controls were included in the study. All patients had normal LA poster-anterior diameter, LA and left ventricular ejection fractions (LVEF >50%) in two-dimensional echocardiography (2-DE)...
June 18, 2018: Acta Cardiologica
https://www.readbyqxmd.com/read/29909402/impact-of-exercise-restriction-on-arrhythmic-risk-among-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy
#13
Weijia Wang, Gabriela Orgeron, Crystal Tichnell, Brittney Murray, Jane Crosson, Oliver Monfredi, Julia Cadrin-Tourigny, Harikrishna Tandri, Hugh Calkins, Cynthia A James
BACKGROUND: Prior studies have shown a close link between exercise and development of arrhythmogenic right ventricular cardiomyopathy. How much exercise restriction reduces ventricular arrhythmia (VA), how genotype modifies its benefit, and whether it reduces risk sufficiently to defer implantable cardioverter-defibrillator (ICD) placement in arrhythmogenic right ventricular cardiomyopathy are unknown. METHODS AND RESULTS: We interviewed 129 arrhythmogenic right ventricular cardiomyopathy patients (age: 34...
June 16, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29909164/-is-it-possible-to-practice-sports-with-an-implantable-cardioverter-defibrillator
#14
Charles Guenancia, Rodrigue Garcia
Why? The potential risks of sport for an ICD recipient include appropriate and inappropriate shocks, device damage and worsening of the underlying cardiopathy. These risks should be compared to the physical and psychological benefits of exercise. Where? Due to different medico-legal contexts and considering the results of recent studies, the new US guidelines are more permissive than the European guidelines regarding sport practice in ICD recipients. Who? The underlying context (structural or electrical cardiopathy, psychological impact) should be assessed before any decision is taken...
June 13, 2018: La Presse Médicale
https://www.readbyqxmd.com/read/29907652/cardiac-resynchronization-therapy-and-clinical-outcomes-in-continuous-flow-left-ventricular-assist-device-recipients
#15
Rakesh Gopinathannair, Henri Roukoz, Adarsh Bhan, Ashwin Ravichandran, Mustafa M Ahmed, Dmitry Familtsev, Geetha Bhat, Jennifer Cowger, Munazzah Abdullah, Chirag Sandesara, Rahul Dhawan, Emma J Birks, Jaimin R Trivedi, Mark S Slaughter
BACKGROUND: Many patients with heart failure continue cardiac resynchronization therapy (CRT) after continuous flow left ventricular assist device (CF-LVAD) implant. We report the first multicenter study to assess the impact of CRT on clinical outcomes in CF-LVAD patients. METHODS AND RESULTS: Analysis was performed on 488 patients (58±13 years, 81% male) with an implantable cardioverter defibrillator (ICD) (n=223) or CRT-D (n=265) who underwent CF-LVAD implantation at 5 centers from 2007 to 2015...
June 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29907466/sudden-death-risk-markers-for-patients-with-left-ventricular-ejection-fractions-greater-than-40
#16
REVIEW
Brian P Halliday, Amrit S Lota, Sanjay K Prasad
The major burden of sudden cardiac death (SCD) in patients with heart disease occurs in those with a left ventricular ejection fraction > 40%. Although the annual risk of SCD may be lower in these patients compared to those with lower LVEF, their lifetime cumulative risk of SCD may be greater due to a better overall prognosis. It is plausible that those with LVEF > 40% who are at highest risk of life-threatening arrhythmia will benefit from implantable cardioverter defibrillators. Features that identify patients with a LVEF > 40% at high risk of SCD are urgently needed...
June 12, 2018: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29907152/the-effect-of-myocardial-action-potential-duration-on-cardiac-pumping-efficacy-a-computational-study
#17
Da Un Jeong, Ki Moo Lim
BACKGROUND AND AIMS: Although studies on the relation between arrhythmias and the action potential duration (APD) have been carried out, most of them are based only on electrophysiological factors of the heart and lack experiments that consider cardiac mechanical and electromechanical characteristics. Therefore, we conducted this study to clarify the relevance of the shortening of APD of a cell in relation to the mechanical contraction activity of the heart and the associated risk of arrhythmia...
June 15, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29906523/ventricular-fibromas-in-children-arrhythmia-risk-and-outcomes-a-multicentre-study
#18
John P Jones, Tristan Ramcharan, Milind Chaudhari, Vinay Bhole, Karen Mcleod, Shankar Sadagopan, Orhan Uzun, Andrew Parry, Jan Till, Colin J McMahon, Alan G Stuart, Mark A Walsh
BACKGROUND: Although ventricular fibromas are a rare, they are the second most common type of cardiac tumor in children. While histologically benign, they have a propensity to cause malignant arrhythmias, with cardiac arrest often being the first presentation.; OBJECTIVE: To evaluate the arrhythmia risk, and management strategies for pediatric ventricular fibromas. METHODS: Fifteen centers in the British Paediatric Arrhythmia Group network were contacted to partake in the study to contribute cases...
June 12, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29906289/activation-recovery-interval-imaging-of-premature-ventricular-contraction
#19
Ting Yang, Long Yu, Qi Jin, Liqun Wu, Bin He
Dispersion of ventricular repolarization due to abnormal activation contributes to the susceptibility to cardiac arrhythmias. However, the global pattern of repolarization is difficult to assess clinically. Activation recovery interval (ARI) has been used to understand the properties of ventricular repolarization. In this study, we developed an ARI imaging technique to noninvasively reconstruct three-dimensional (3D) ARI maps in 10 premature ventricular contraction (PVC) patients and evaluated the results with the endocardial ARI maps recorded by a clinical navigation system (CARTO)...
2018: PloS One
https://www.readbyqxmd.com/read/29905788/extended-use-of-the-wearable-cardioverter-defibrillator-in-patients-at-risk-for-sudden-cardiac-death
#20
Valentina Kutyifa, Katherine Vermilye, Usama A Daimee, Scott McNitt, Helmut Klein, Arthur J Moss
Aims: Data on outcomes in patients using the wearable cardioverter-defibrillator (WCD) > 90 days are limited. We aimed to analyse the clinical course of patients with WCD use ≤90 days vs. WCD use >90 days. Methods and results: We assessed arrhythmia events during WCD use, and ejection fraction (EF) improvement/implantable cardioverter-defibrillator (ICD) implantation at the end of WCD use in patients with WCD use ≤90 days vs. WCD use >90 days enrolled in the WEARIT-II registry, further assessed by disease aetiology (ischaemic vs...
June 14, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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