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https://www.readbyqxmd.com/read/28944178/alcohol-septal-ablation-in-which-patients-and-why
#1
Paolo Spirito, Jessica Rossi, Barry J Maron
At present, surgical septal myectomy is regarded as the "gold standard" treatment for most patients with obstructive hypertrophic cardiomyopathy (HCM) and drug-refractory symptoms. However, the best results are obtained by those surgeons who have extensive experience with this operation at a small number of referral centers. In the mid-1990s, percutaneous alcohol septal ablation was introduced as an alternative to myectomy to reduce LV outflow gradient and heart failure symptoms in patients with obstructive HCM...
July 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28940909/postimplantation-ventricular-ectopic-burden-and-clinical-outcomes-in-cardiac-resynchronization-therapy-defibrillator-patients-a-madit-crt-substudy
#2
Anne-Christine Ruwald, Mehmet K Aktas, Martin H Ruwald, Valentina Kutyifa, Scott McNitt, Christian Jons, Suneet Mittal, Jonathan S Steinberg, James P Daubert, Arthur J Moss, Wojciech Zareba
BACKGROUND: Frequent ventricular ectopy on preimplantation Holter has been associated with attenuated benefit from cardiac resynchronization therapy (CRT). However, it is unclear whether ectopic burden measured post-CRT implantation can be utilized to evaluate long-term prognosis. We aimed to describe the association between post-CRT implantation ectopic burden and subsequent risk of clinical outcomes. METHODS: At the 12-month follow-up visit, 24-hour Holter recordings were performed in 698 CRT-D patients from the MADIT-CRT study...
September 20, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28934412/gorenek-b-et-al-device-detected-subclinical-atrial-tachyarrhythmias-definition-implications-and-management-an-european-heart-rhythm-association-ehra-consensus-document-endorsed-by-heart-rhythm-society-hrs-asia-pacific-heart-rhythm-society-aphrs-and-sociedad
#3
https://www.readbyqxmd.com/read/28934408/device-detected-subclinical-atrial-tachyarrhythmias-definition-implications-and-management-an-european-heart-rhythm-association-ehra-consensus-document-endorsed-by-heart-rhythm-society-hrs-asia-pacific-heart-rhythm-society-aphrs-and-sociedad-latinoamericana
#4
Bulent Gorenek, Jeroen Bax, Giuseppe Boriani, Shih-Ann Chen, Nikolaos Dagres, Taya V Glotzer, Jeff S Healey, Carsten W Israel, Gulmira Kudaiberdieva, Lars-Åke Levin, Gregory Y H Lip, David Martin, Ken Okumura, Jesper H Svendsen, Hung-Fat Tse, Giovanni L Botto, Cecilia Linde, Valentina Kutyifa, Robert Bernat, Daniel Scherr, Chu-Pak Lau, Pedro Iturralde, Daniel P Morin, Irina Savelieva
No abstract text is available yet for this article.
September 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28930576/impact-of-chocolate-on-the-cardiovascular-health
#5
Maria Alessandra Gammone, Konstantinos Efthymakis, Francesca Romana Pluchinotta, Sonia Bergante, Guido Tettamanti, Graziano Riccioni, Nicolantonio D'Orazio
The antioxidants such as polyphenols, especially flavonols, present in large quantitites in cocoa, cause vasodilation, modulate inflammatory markers and cardiovascular health, and possess a range of protective cardiovascular effects. On the other hand, overconsumption of chocolate can lead to tachyarrhythmias, supraventricular tachycardia, atrial fibrillation, ventricular tachycardia and ventricular fibrillation due to its caffeine content. This review describes both the cardioprotective and adverse effects of chocolate and its constituents...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28928241/vital-exhaustion-and-sudden-cardiac-death-in-the-atherosclerosis-risk-in-communities-study
#6
Brittany M Bogle, Nona Sotoodehnia, Anna M Kucharska-Newton, Wayne D Rosamond
OBJECTIVE: Vital exhaustion (VE), a construct defined as lack of energy, increased fatigue and irritability, and feelings of demoralisation, has been associated with cardiovascular events. We sought to examine the relation between VE and sudden cardiac death (SCD) in the Atherosclerosis Risk in Communities (ARIC) Study. METHODS: The ARIC Study is a predominately biracial cohort of men and women, aged 45-64 at baseline, initiated in 1987 through random sampling in four US communities...
September 19, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28916511/failure-to-treat-life-threatening-ventricular-tachyarrhythmias-in-contemporary-implantable-cardioverter-defibrillators-implications-for-strategic-programming
#7
Anna Margrethe Thøgersen, Jacob Moesgaard Larsen, Jens Brock Johansen, Moeen Abedin, Charles D Swerdlow
BACKGROUND: In clinical trials, manufacturer-specific, strategic programming of implantable cardioverter-defibrillators (ICDs), including faster detection rates, reduces unnecessary therapy but permits therapy for ventricular tachycardia/ventricular fibrillation (VF). Present consensus recommends a generic rate threshold between 185 and 200 beats per minute, which exceeds the rate tested in clinical trials for some manufacturers. In a case series, we sought to determine the relationship between programmed parameters and failure of modern ICDs to treat VF...
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28916174/evaluation-of-beat-to-beat-ventricular-repolarization-lability-from-standard-12-lead-ecg-during-acute-myocardial-ischemia
#8
Salah S Al-Zaiti, Mohammad Alrawashdeh, Christian Martin-Gill, Clifton Callaway, David Mortara, Jan Nemec
BACKGROUND: Acute myocardial ischemia is a common cause of ventricular arrhythmias, yet recent ECG methods predicting susceptibility to ventricular tachyarrhythmia have not been fully evaluated during spontaneous ischemia. We sought to evaluate the clinical utility of alternans and non-alternans components of repolarization variability from the standard 10-second 12-lead ECG signals to risk stratify patients with acute chest pain. METHODS: We enrolled consecutive, non-traumatic, chest pain patients transported through Emergency Medical Services (EMS) to three tertiary care hospitals with cardiac catheterization lab capabilities in Pittsburgh, PA...
August 10, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28912187/pediatric-cardiomyopathies
#9
REVIEW
Teresa M Lee, Daphne T Hsu, Paul Kantor, Jeffrey A Towbin, Stephanie M Ware, Steven D Colan, Wendy K Chung, John L Jefferies, Joseph W Rossano, Chesney D Castleberry, Linda J Addonizio, Ashwin K Lal, Jacqueline M Lamour, Erin M Miller, Philip T Thrush, Jason D Czachor, Hiedy Razoky, Ashley Hill, Steven E Lipshultz
Pediatric cardiomyopathies are rare diseases with an annual incidence of 1.1 to 1.5 per 100 000. Dilated and hypertrophic cardiomyopathies are the most common; restrictive, noncompaction, and mixed cardiomyopathies occur infrequently; and arrhythmogenic right ventricular cardiomyopathy is rare. Pediatric cardiomyopathies can result from coronary artery abnormalities, tachyarrhythmias, exposure to infection or toxins, or secondary to other underlying disorders. Increasingly, the importance of genetic mutations in the pathogenesis of isolated or syndromic pediatric cardiomyopathies is becoming apparent...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28901675/sudden-cardiac-death-in-isolated-right-ventricular-hypertrabeculation-noncompaction-cardiomyopathy
#10
Soad Bekheit, Boutros Karam, Farshid Daneshvar, Julie Zaidan, Rabih Tabet, Jonathan Spagnola, James Lafferty
Hypertrabeculation/noncompaction of the myocardium is a rare disorder that involves most commonly the left ventricle of the heart and it has been recognized as a distinct cardiomyopathy by the World Health Organization. However, it is extremely rare for this condition to involve exclusively the right ventricle. We report the cases of three patients who presented with ventricular tachyarrhythmia and sudden cardiac death. They were found to have isolated right ventricular hypertrabeculation/noncompaction on echocardiography...
September 12, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28899956/atrial-tachyarrhythmia-in-congenital-heart-disease-beyond-the-suture-lines
#11
EDITORIAL
Elisabeth M J P Mouws, Natasja M S de Groot
No abstract text is available yet for this article.
September 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28891553/hyperthyroidism-and-sick-sinus-syndrome-a-rare-but-challenging-association-a-study-of-three-cases
#12
M Tudoran, C Tudoran
Hyperthyroidism is usually associated with sinus tachycardia or supraventricular tachyarrhythmias, but rarely with dysfunction of the sinus node or other conduction disturbances. Evidence of bradyarrhythmia in patients with hyperthyroidism is clinically relevant, but the fact that several drugs with negative chronotropic effects (beta-blockers and calcium channel antagonists) are frequently used in the management of these patients must be taken into account. In the presence of sick sinus syndrome (SSS) or other conductance disturbances, therapy with agents that delay the activity of sinus node or atrioventricular conduction can lead to extreme bradycardia with syncope...
August 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28887742/efficacy-of-ganglionated-plexi-ablation-in-addition-to-pulmonary-vein-isolation-for-paroxysmal-versus-persistent-atrial-fibrillation-a-meta-analysis-of-randomized-controlled-clinical-trials
#13
Polydoros N Kampaktsis, Evangelos K Oikonomou, Daniel Y Choi, Jim W Cheung
PURPOSE: Adjunctive ganglionated plexi (GP) ablation may improve success rates for treatment of atrial fibrillation (AF) when combined with pulmonary vein (PV) isolation. Existing meta-analyses on GP ablation have included observational studies and have not incorporated more recent randomized clinical trial data. Moreover, the impact of AF subtype (paroxysmal vs. persistent) on outcomes of GP ablation has not been well established. METHODS: We performed a meta-analysis of randomized controlled trials (RCTs) comparing GP ablation + pulmonary vein (PV) isolation versus PV isolation alone according to the subtype of AF...
September 8, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28884923/low-voltage-areas-detected-by-high-density-electroanatomical-mapping-predict-recurrence-after-ablation-for-paroxysmal-atrial-fibrillation
#14
Konstantinos Vlachos, Michael Efremidis, Konstantinos P Letsas, George Bazoukis, Ruairidh Martin, Maria Kalafateli, Louiza Lioni, Stamatis Georgopoulos, Athanasios Saplaouras, Theodore Efremidis, Tong Liu, Kosmas Valkanas, Nikolaos Karamichalakis, Dimitrios Asvestas, Antonios Sideris
INTRODUCTION: We aimed to evaluate the extent of atrial fibrosis in paroxysmal atrial fibrillation (AF) and the correlation with ablation outcomes after pulmonary vein antral isolation (PVΑI) using a mapping system with high-resolution and high-spatial sampling. METHODS AND RESULTS: We prospectively enrolled 80 consecutive patients (45 males, median age 60.26 years) with symptomatic paroxysmal AF who were scheduled for PVAI. Prior to PVAI, high-density bipolar voltage mapping (median number of 2,485 points) was carried out during sinus rhythm in all patients...
September 8, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28883612/human-electronegative-low-density-lipoprotein-modulates-cardiac-repolarization-via-lox-1-mediated-alteration-of-sarcolemmal-ion-channels
#15
An-Sheng Lee, Yutao Xi, Chin-Hu Lai, Wei-Yu Chen, Hsien-Yu Peng, Hua-Chen Chan, Chu-Huang Chen, Kuan-Cheng Chang
Dyslipidemia is associated with greater risk of ventricular tachyarrhythmias in patients with cardiovascular diseases. We aimed to examine whether the most electronegative subfraction of low-density lipoprotein (LDL), L5, is correlated with QTc prolongation in patients with coronary artery disease (CAD) and investigate the effects of human L5 on the electrophysiological properties of cardiomyocytes in relation to the lectin-like oxidized LDL receptor (LOX-1). L5 was isolated from the plasma of 40 patients with angiography documented CAD and 13 patients with no CAD to correlate the QTc interval respectively...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28875096/narrow-complex-ventricular-tachycardia
#16
Murtaza Sundhu, Mehmet Yildiz, Sajjad Gul, Mubbasher Syed, Idrees Azher, Robert Mosteller
Myocardial infarctions are frequently complicated by tachyarrhythmias, which commonly have wide QRS complexes (QRS duration > 120 milliseconds). Many published criteria exist to help differentiate between ventricular and supraventricular mechanisms. We present a case of a 61-year-old male with a history of hypertension, hyperlipidemia and coronary artery disease with prior stenting of the right coronary artery (RCA). He had been noncompliant with his antiplatelet medication and presented with cardiac arrest secondary to in-stent thrombosis...
July 4, 2017: Curēus
https://www.readbyqxmd.com/read/28873172/tachyarrhythmia-onset-captured-on-telemetry-deciphers-the-diagnosis
#17
Maen D Abou Ziki, Lynda E Rosenfeld
No abstract text is available yet for this article.
September 5, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28864717/impact-of-presynaptic-sympathetic-imbalance-in-long-qt-syndrome-by-positron-emission-tomography
#18
Sven Zumhagen, Alexis Vrachimis, Lars Stegger, Peter Kies, Christian Wenning, Marko Ernsting, Jovanca Müller, Guiscard Seebohm, Matthias Paul, Klaus Schäfers, Birgit Stallmeyer, Michael Schäfers, Eric Schulze-Bahr
OBJECTIVE: We investigated the impact of cardiac presynaptic norepinephrine recycling in patients with long-QT syndrome (LQTS) using positron emission tomography (PET) with (11)C-meta-hydroxyephedrine ([(11)C]mHED-PET). METHODS: [(11)C]mHED-PET was performed in 25 patients with LQTS (LQT1: n=14; LQT2: n=11) and 20 healthy controls and correlated with clinical parameters. [(11)C]mHED-PET images were analysed for global and regional retention indices (RI) and washout rates (WO) reflecting dynamic parameters of the tracer activity...
September 1, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28863155/electrophysiological-characteristics-of-pressure-overload-induced-cardiac-hypertrophy-and-its-influence-on-ventricular-arrhythmias
#19
Xiaowei Chen, Mu Qin, Weifeng Jiang, Yu Zhang, Xu Liu
OBJECTIVE: To explore the cardiac electrophysiological characteristics of cardiac hypertrophy and its influence on the occurrence of ventricular tachyarrhythmias. METHODS: Adult C57BL6 mice were randomly divided into a surgery group and a control group. Thoracic aortic constriction was performed on mice in the surgery group, and cardiac anatomical and ultrasonic evaluations were performed to confirm the success of the cardiac hypertrophy model 4 weeks after the operation...
2017: PloS One
https://www.readbyqxmd.com/read/28861756/management-of-supraventricular-tachycardia-in-infants
#20
Chalese Richardson, Eric S Silver
Supraventricular tachycardia is the most common tachyarrhythmia encountered in infants. In older children and adults, definitive treatment of the supraventricular tachycardia substrate with catheter ablation is a common approach to management. However, in infants, the risks of catheter ablation are significantly higher, and the patients often outgrow the potential to experience episodes. Therefore, antiarrhythmic medications are often utilized to minimize the likelihood of experiencing episodes. This article reviews the common arrhythmia mechanisms encountered in infants and the medications used to treat these patients...
August 31, 2017: Paediatric Drugs
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