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https://www.readbyqxmd.com/read/28227090/amplitude-based-beat-detection-for-atrial-fibrillation-in-pacemaker
#1
Seung Hwan Lee, Hyoun Seok Myoung, Chang Hoon Kang, Eue Keun Choi, Kyoung Joung Lee, Seung Hwan Lee, Hyoun Seok Myoung, Chang Hoon Kang, Eue Keun Choi, Kyoung Joung Lee, Chang Hoon Kang, Eue Keun Choi, Seung Hwan Lee, Kyoung Joung Lee, Hyoun Seok Myoung
Bradycardia is defined as a sinus rhythm of less than 60 beats per minute and atrial tachyarrhythmia including atrial fibrillation (AF) is frequently associated with bradycardia. Pacemaker is the only effective treatment for symptomatic bradycardia and automatic mode switching (AMS) function is built in pacemaker to switch mode in the presence of atrial tachyarrhythmia. AMS algorithms consider appropriate mode switching in case of undersensing or oversensing and this consideration makes their onset time and resynchronization time late...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226552/patient-specific-detection-of-ventricular-tachycardia-in-remote-continuous-health-devices
#2
Amit Juneja, Michael Marefat, Amit Juneja, Michael Marefat, Amit Juneja, Michael Marefat
Ventricular Tachycardia (VT) is a dangerous arrhythmic event which can lead to sudden cardiac death if not detected and taken care of in time. This work uses non-linear features derived from Recurrence Quantification Analysis (RQA) along with Kolmogorov complexity, by analyzing the ECG signals, to train a classifier which can predict VT prior to their onset in remote continuous health devices. Compressed ECG signal along with amplitude ranges extracted from the ECG signal are used as features to strengthen the classifier...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225470/life-threatening-tachyarrhythmia-following-intra-arterial-milrinone-for-cerebral-vasospasm
#3
Smita Vimala, Soumya Madhusudhan, Bimal K Sahoo
No abstract text is available yet for this article.
February 20, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28220942/crt-induced-ventricular-tachyarrhythmia-what-s-the-mechanism
#4
Sanoj Chacko, Enes Gul, Chris Simpson, Adrian Baranchuk
A 56-year-old woman with non-ischemic dilated cardiomyopathy and severe left ventricular systolic dysfunction received cardiac resynchronization defibrillator therapy (CRT-D; St Jude Medical Quadra Assura, CA, USA), for primary prevention and management of heart failure. This article is protected by copyright. All rights reserved.
February 21, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28218629/fever-induced-brugada-pattern-misdiagnosed-as-an-acute-myocardial-infarction
#5
David Tadin, Roberto Quintal
The Brugada syndrome is a rare condition associated with increased risk of ventricular tachyarrhythmias and sudden cardiac death (SCD). The Brugada pattern on electrocardiogram (EKG) is known to be revealed by several precipitants including febrile illnesses. The appearance of a Brugada pattern on EKG with fever may indicate an elevated risk of arrhythmia or sudden cardiac death. We report a case in which the electrocardiographic abnormality of Brugada pattern induced by sepsis was initially misinterpreted as a ST-segment elevation myocardial infarction (STEMI)...
January 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28209460/pharmacologic-cardioversion-with-intravenous-amiodarone-is-likely-safe-in-neurocritically-ill-patients
#6
Michael Su, David Seki, Asma M Moheet
Neurological injury is often associated with cardiac abnormalities, including electrophysiological issues. Cardioversion of acute atrial fibrillation (<48h' duration) without anticoagulation carries about a 0.7% risk of thromboembolism. There is limited data on managing acute atrial fibrillation specifically in the neuroscience intensive care unit (NSICU) setting. We sought to determine the safety of using intravenous (IV) amiodarone for restoring sinus rhythm in patients with presumed new onset atrial or ventricular tachycardia after neurological injury...
February 13, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28209388/increased-risk-of-thromboembolic-events-in-adult-congenital-heart-disease-patients-with-atrial-tachyarrhythmias
#7
Keita Masuda, Tomoko Ishizu, Koichiro Niwa, Fumie Takechi, Shigeru Tateno, Hitoshi Horigome, Kazutaka Aonuma
BACKGROUND: Atrial tachyarrhythmias are a major morbidity in patients with adult congenital heart disease (ACHD). However, few studies have investigated risk stratification of thromboembolic events in ACHD patients with atrial tachyarrhythmias. METHODS AND RESULTS: This retrospective cohort study reviewed the clinical records of 2314 ACHD patients from 1977 to 2014. We found 242 (10.4%) patients with atrial tachyarrhythmias and excluded 84 patients already being treated with anticoagulant therapy...
February 5, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28208963/clinical-profile-of-cardiac-arrhythmias-in-children-attending-the-out-patient-department-of-a-tertiary-paediatric-care-centre-in-chennai
#8
Sarala Premkumar, Premkumar Sundararajan, Thangavelu Sangaralingam
INTRODUCTION: The presentation of symptoms of paediatric arrhythmias vary depending on the age and underlying heart disease. Physical examination of children with important arrhythmias may be entirely normal. AIM: Aim is to study the characteristics of cardiac arrhythmias in paediatric patients in a tertiary paediatric care centre in Chennai, India. MATERIALS AND METHODS: The participants (n=60) were from birth to 12 years of age. Patients with sinus arrhythmias, sinus tachycardia and sinus bradycardia were excluded...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28201546/incidence-and-predictors-of-sudden-death-major-conduction-defects-and-sustained-ventricular-tachyarrhythmias-in-1388-patients-with-myotonic-dystrophy-type-1
#9
Karim Wahbi, Dominique Babuty, Vincent Probst, Ludivine Wissocque, Fabien Labombarda, Raphaël Porcher, Henri Marc Bécane, Arnaud Lazarus, Anthony Béhin, Pascal Laforêt, Tanya Stojkovic, Nicolas Clementy, Aurélie Pattier Dussauge, Jean Baptiste Gourraud, Yann Pereon, Arnaud Lacour, Françoise Chapon, Paul Milliez, Didier Klug, Bruno Eymard, Denis Duboc
No abstract text is available yet for this article.
December 9, 2016: European Heart Journal
https://www.readbyqxmd.com/read/28188960/occurrence-of-focal-atrial-tachycardia-during-the-ablation-procedure-is-associated-with-arrhythmia-recurrence-after-termination-of-persistent-atrial-fibrillation
#10
Shinsuke Iwai, Yoshihide Takahashi, Mayumi Masumura, Syu Yamashita, Junichi Doi, Tasuku Yamamoto, Atsushi Sakakibara, Hidetsugu Nomoto, Yoshinori Yoshida, Tomoyo Sugiyama, Tetsuo Oumi, Masakazu Ohno, Yasuhiro Sato, Kenzo Hirao, Mitsuaki Isobe
INTRODUCTION: Catheter ablation can terminate persistent atrial fibrillation (AF). However, atrial tachycardia (AT) often arises after termination of AF. METHODS AND RESULTS: Of 215 patients who underwent index stepwise ablation for persistent AF, 141 (66%) patients (64±9 years) in whom AF terminated during the ablation procedure were studied. If AF converted into AT, ablation for AT was subsequently performed. ATs were categorized as focal or macro-reentrant AT...
February 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28187972/late-results-of-the-cox-maze-iv-procedure-in-patients-undergoing-coronary-artery-bypass-grafting
#11
Matthew R Schill, Farah N Musharbash, Vivek Hansalia, Jason W Greenberg, Spencer J Melby, Hersh S Maniar, Laurie A Sinn, Richard B Schuessler, Marc R Moon, Ralph J Damiano
OBJECTIVE: Most patients with atrial fibrillation (AF) undergoing cardiac surgery do not receive concomitant ablation. This study reviewed outcomes of patients with AF undergoing Cox-maze IV (CMIV) procedure with radiofrequency and cryoablation and coronary artery bypass grafting (CABG) at our institution. METHODS: Between the introduction of radiofrequency ablation in 2002 and 2015, 135 patients underwent left- or biatrial CMIV with CABG. Patients undergoing other cardiac procedures, except mitral valve repair, or who had emergent, reoperative, or off-pump procedures were excluded...
January 16, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28183572/cervical-sympathetic-blockade-for-the-management-of-electrical-storm
#12
Rehan Ali, Jeffrey Ciccone, Victor Tseng
A 75-year-old man presented with dizziness and fatigue secondary to ventricular and supraventricular arrhythmias. He underwent an elective ablation but continued to suffer from ventricular tachycardia with cardiovascular instability despite antiarrhythmic therapy with multiple agents. The patient continued to develop episodes of ventricular tachycardia and an episode of ventricular fibrillation. Electrical storm encompasses a situation of cardiac instability which may present as several episodes of ventricular tachycardia or ventricular fibrillation in a short period...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28158934/inducibility-of-ventricular-arrhythmia-1-year-following-treatment-with-heavy-ion-irradiation-in-dogs-with-myocardial-infarction
#13
Mari Amino, Koichiro Yoshioka, Yoshiya Furusawa, Sachie Tanaka, Noboru Kawabe, Tadashi Hashida, Teruyo Tsukada, Masako Izumi, Sadaki Inokuchi, Teruhisa Tanabe, Yuji Ikari
BACKGROUND: Targeted external heavy ion irradiation (THIR) of rabbit hearts 2 weeks after myocardial infarction (MI) reduced the vulnerability of fatal ventricular tachyarrhythmias (VT/VF) in association with the increased connexin43 (Cx43). Increased Cx43 was maintained for at least 1 year in normal rabbits, but the long-term antiarrhythmic effects in the MI model are unknown. We investigated the propensity for late potentials and VT/VF inducibility. METHODS: Intracoronary injection of microspheres was performed to induce non-transmural MI in anaesthetized 8 beagles...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28154593/the-role-of-intravenous-dopamine-on-hemodynamic-support-during-radiofrequency-catheter-ablation-of-poorly-tolerated-idiopathic-ventricular-tachycardia
#14
Jinhee Ahn, Dong-Hyeok Kim, Seung-Young Roh, Kwang No Lee, Dae-In Lee, Jaemin Shim, Jong-Il Choi, Young-Hoon Kim
BACKGROUND AND OBJECTIVES: Hemodynamically unstable idiopathic ventricular tachycardias (VTs) are a challenge for activation or entrainment mapping technique. Mechanical circulatory support is an option, but is not always readily available. In this study, we investigated the safety and efficacy of hemodynamic support using intravenous (IV) dopamine solely during radiofrequency catheter ablation (RFCA) of hemodynamically unstable VT. SUBJECTS AND METHODS: Seven out of 86 patients with hemodynamically unstable idiopathic VT underwent de novo RFCA using dopamine in our single center...
January 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28150739/alterations-in-the-carnitine-cycle-in-a-mouse-model-of-rett-syndrome
#15
Sabrina Mucerino, Anna Di Salle, Nicola Alessio, Sabrina Margarucci, Raffaella Nicolai, Mariarosa A B Melone, Umberto Galderisi, Gianfranco Peluso
Rett syndrome (RTT) is a neurodevelopmental disease that leads to intellectual deficit, motor disability, epilepsy and increased risk of sudden death. Although in up to 95% of cases this disease is caused by de novo loss-of-function mutations in the X-linked methyl-CpG binding protein 2 gene, it is a multisystem disease associated also with mitochondrial metabolic imbalance. In addition, the presence of long QT intervals (LQT) on the patients' electrocardiograms has been associated with the development of ventricular tachyarrhythmias and sudden death...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28150095/risk-of-ventricular-tachyarrhythmias-following-improvement-of-left-ventricular-ejection-fraction-in-patients-with-implantable-cardiac-defibrillators-implanted-for-primary-prevention-of-sudden-cardiac-death
#16
Jayasree Pillarisetti, Rakesh Gopinathannair, Matthew J Haney, Bassem Abazid, Wasiq Rawasia, Madhu Yeruva Reddy, Niveditha Adabala, Sudharani Bommana, Martin Emert, Dhanunjaya Lakkireddy
PURPOSE: In patients who undergo implantable cardiac defibrillator (ICD) implantation for primary prevention of sudden cardiac death (SCD), data is unclear whether their ICD generator needs to be replaced at end of life if their left ventricular ejection fraction (EF) improves. Despite improvement in EF, the underlying scar may represent a potential substrate for ventricular arrhythmias. METHODS: Data on 280 patients who underwent ICD implantation for primary prevention of SCD was obtained from two centers...
February 1, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28143653/methods-accuracy-and-clinical-implications-of-atrial-fibrillation-detection-by-cardiac-implantable-electronic-devices
#17
Diana Solari, Edoardo Bertero, Roberta Miceli, Claudio Brunelli, Pietro Ameri, Marco Canepa
Atrial fibrillation (AF) is the most common arrhythmia in the developed countries and is associated with an increased risk of thromboembolic events and heart failure. Episodes of AF are often asymptomatic and intermittent, eluding diagnosis with non-continuous monitoring techniques. Cardiac implantable electronic devices (CIEDs) represent the gold standard for detecting asymptomatic AF. Improper CIED programming may however increase the risk of false-positive detection of atrial tachyarrhythmias, leading to inappropriate clinical management of patients...
January 14, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28139392/primary-intrapericardial-leiomyoma-as-a-cause-of-atrial-tachyarrhythmia
#18
Buqing Ni, Hongwu Chen, Minglong Chen, Qixing Gong, Yongfeng Shao
No abstract text is available yet for this article.
January 27, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28139301/corrigendum-to-ventricular-tachyarrhythmia-during-pregnancy-in-women-with-heart-disease-data-from-the-ropac-a-registry-from-the-european-society-of-cardiology-int-j-cardiol-220-2016-131-136
#19
Ebru Ertekin, Iris M van Hagen, Amar M Salam, Titia P E Ruys, Mark R Johnson, Jana Popelova, William A Parsonage, Zeinab Ashour, Avraham Shotan, José M Oliver, Gruschen R Veldtman, Roger Hall, Jolien W Roos-Hesselink
No abstract text is available yet for this article.
January 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28128523/initial-clinical-experience-with-the-gore-%C3%A2-cardioform-asd-occluder-for-transcatheter-atrial-septal-defect-closure
#20
Quentin de Hemptinne, Eric M Horlick, Mark D Osten, Xavier Millán, Victor-Xavier Tadros, Michele Pighi, Francisco Gonzalez Barlatey, Sami M Alnasser, Joaquim Miró, Anita W Asgar, Réda Ibrahim
OBJECTIVES: To report the initial clinical experience with a novel atrial septal defect (ASD) closure device, the GORE(®) CARDIOFORM ASD Occluder (GCO). BACKGROUND: Transcatheter closure has become the treatment of choice for secundum ASD. A wide range of occluder devices are available, but concern has been raised about the risk of cardiac erosion associated with rigid devices and future access to the left atrium METHODS: Retrospective chart review of patients treated with the GCO at three Canadian centers...
January 27, 2017: Catheterization and Cardiovascular Interventions
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