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https://www.readbyqxmd.com/read/28331443/pacemaker-use-following-heart-transplantation
#1
Hari R Mallidi, Michael Bates
BACKGROUND: The incidence of permanent pacemaker implantation after orthotopic heart transplantation has been reported to be 2%-24%. Transplanted hearts usually exhibit sinus rhythm in the operating room following reperfusion, and most patients do not exhibit significant arrhythmias during the postoperative period. However, among the patients who do exhibit abnormalities, pacemakers may be implanted for early sinus node dysfunction but are rarely used after 6 months. Permanent pacing is often required for atrioventricular block...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28316174/-efficacy-and-safety-analysis-of-ivabradine-hydrochloride-treatment-of-chinese-patients-with-chronic-heart-failure-subgroup-analysis-of-chinese-patients-in-the-shift-study
#2
D Y Hu, D J Huang, Z Y Yuan, R P Zhao, X W Yan, M H Wang
Objective: To evaluate the efficacy and safety of ivabradine for the treatment of Chinese patients with chronic heart failure based on the Chinese subgroup data of the systolic heart failure treatment with the I(f) inhibitor ivabradine trial (SHIFT). Method: A total of 6 558 stable outpatients who presented symptoms of heart failure, with a left ventricular ejection fraction (LVEF) ≤35%, sinus rhythms with a heart rate ≥70 bpm participated in the randomized, double-blind, placebo-controlled, international multicenter clinical study...
March 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28304253/ventricular-parasystole-in-a-neonatal-rhesus-macaque-macaca-mulatta
#3
Dalis E Collins, Brandy L Dozier, Jeffrey J Stanton, Lois Ma Colgin, Rhonda MacAllister
A 6-d-old Indian-origin female rhesus macaque (Macaca mulatta) presented with bradycardia shortly after sedation with ketamine. No other cardiac abnormalities were apparent. Approximately 2 wk after the initial presentation, the macaque was again bradycardic and exhibited a regularly irregular arrhythmia on a prestudy examination. ECG, echocardiography, blood pressure measurement, SpO2 assessment, and a CBC analysis were performed. The echocardiogram and bloodwork were normal, but the infant was hypotensive at the time of echocardiogram...
December 1, 2016: Comparative Medicine
https://www.readbyqxmd.com/read/28287212/-the-pacemaker-and-implantable-cardioverter-defibrillator-registry-of-the-italian-association-of-arrhythmology-and-cardiac-pacing-annual-report-2015
#4
Alessandro Proclemer, Massimo Zecchin, Antonio D'Onofrio, Giuseppe Boriani, Giovanni Luca Botto, Domenico Facchin, Luca Rebellato, Marco Ghidina, Giulia Bianco, Emanuela Bernardelli, Elsa Pucher, Dario Gregori
BACKGROUND: The pacemaker (PM) and implantable cardioverter-defibrillator (ICD) Registry of the Italian Association of Arrhythmology and Cardiac Pacing (AIAC) monitors the main epidemiological data in real-world practice. The survey for the 2015 activity collects information about demographics, clinical characteristics, main indications for PM/ICD therapy and device types from the Italian collaborating centers. METHODS: The Registry collects prospectively national PM and ICD implantation activity on the basis of European cards...
January 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28283677/guillain-barr%C3%A3-syndrome-presenting-with-sinus-node-dysfunction-and-refractory-shock
#5
Le Dung Ha, Farrukh Abbas, Mohan Rao
BACKGROUND Guillain-Barré syndrome (GBS) is an acute inflammatory demyelinating polyneuropathy that is usually associated with preceding respiratory or gastrointestinal infection and has the hallmark manifestation of ascending flaccid paralysis. We report an atypical presentation of GBS. CASE REPORT A 76-year-old male presented with acute onset of diaphoresis and altered mental status. He subsequently developed severe bradycardia and refractory hypotension, which initially responded to dopamine infusion. A temporary pacemaker wire was placed to stabilize the heart rate but hypotension persisted...
March 11, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28283175/efficacy-of-intravenous-sotalol-for-treatment-of-incessant-tachyarrhythmias-in-children
#6
Xiaomei Li, Yan Zhang, Haiju Liu, He Jiang, Haiyan Ge, Yi Zhang
Our objective was to evaluate the efficacy and safety of intravenous (IV) sotalol in the treatment of incessant tachyarrhythmias in children with normal cardiac function. Eighty-three children admitted to hospital from October 2011 to December 2014 were treated with IV sotalol or IV sotalol plus IV propafenone. The time to conversion to sinus rhythm and maintaining sinus rhythm were evaluated. Blood pressure, heart rate, QTc, PR intervals, and rhythm were monitored; 50 patients (60%) were converted to sinus rhythm with IV sotalol; time to conversion was 12...
February 10, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28276794/insufficient-efficacy-and-safety-of-intravenous-ribavirin-in-treatment-of-haemorrhagic-fever-with-renal-syndrome-caused-by-puumala-virus
#7
Oleg V Malinin, Alexander E Platonov
BACKGROUND: Intravenous ribavirin has been reported to be an effective treatment for haemorrhagic fever with renal syndrome (HFRS) caused by Hantaan virus in Asia. However, its therapeutic benefits for HFRS caused by Puumala virus (PUUV) in Europe are still unknown. METHODS: A randomized, open-label study of efficacy and safety of intravenous ribavirin in the treatment of HFRS was conducted in the European part of Russia. Seventy-three patients with suspected HFRS within 4 d of the onset of the disease were randomized to receive either intravenous ribavirin (33 mg/kg, followed by 16 mg/kg given every 6 h for 4 d and by 8 mg/kg given every 8 h for 3 d) plus standard therapy (n = 37) or standard therapy alone (n = 36)...
March 3, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28268890/amplitude-based-beat-detection-for-atrial-fibrillation-in-pacemaker
#8
Seung Hwan Lee, Hyoun Seok Myoung, Chang Hoon Kang, Eue Keun Choi, Kyoung Joung Lee
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/28266824/cardiovascular-disease-update-bradyarrhythmias
#9
Craig Barstow, Johnathan D McDivitt
Bradyarrhythmia (bradycardia) is a heart rate lower than 60 beats/min. It can be due to sinus, atrial, or junctional bradycardia or to a problem with the conduction system (eg, an atrioventricular block). Asymptomatic bradycardia is common, especially among trained athletes or during sleep. Bradycardia symptoms can include syncope, dizziness, chest pain, dyspnea, or fatigue. It is important to determine during the evaluation if bradycardia is the cause of the patient's symptoms. In the acute setting, symptomatic patients should be treated with atropine...
March 2017: FP Essentials
https://www.readbyqxmd.com/read/28262289/a-single-center-s-experience-with-pacemaker-implantation-after-the-cox-maze-procedure-for-atrial-fibrillation
#10
Niv Ad, Sari D Holmes, Rabia Ali, Graciela Pritchard, Deborah Lamont
OBJECTIVE: The Cox maze procedure (CM) is safe and effective for all atrial fibrillation (AF) types. A recent randomized trial found alarming rates of pacemaker implantation (PMI) during hospitalization after CM. The purpose of this study was to assess the rate of PMI and its impact on outcomes after CM. METHODS: Incidence of PMI was captured for all CM patients (2005-2015; N = 739). Data were collected prospectively. Multivariable logistic regression was conducted to determine risk factors for PMI...
February 9, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28248441/electrocardiographic-characteristics-in-individuals-with-cocaine-use-disorder
#11
James J Mahoney, Colin N Haile, Richard De La Garza, Harsh Thakkar, Thomas F Newton
BACKGROUND AND OBJECTIVES: Chronic cocaine use has been linked to several abnormalities in cardiac functioning. The objective of this study was to further characterize baseline heart rate and electrocardiograph (ECG) profiles of individuals with cocaine use disorder (CUD) by evaluating demographic and drug use variables that may impact cardiovascular profiles. METHODS: Participants with CUD (n = 335, primarily African-American males) provided demographic and drug use data and ECG profiles (eg, heart rate, PR Interval, QRS, and QTc) were obtained via 12-lead ECG...
March 1, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28243683/effect-of-alectinib-on-cardiac-electrophysiology-results-from-intensive-electrocardiogram-monitoring-from-the-pivotal-phase-ii-np28761-and-np28673-studies
#12
Peter N Morcos, Katrijn Bogman, Stanislas Hubeaux, Carolina Sturm-Pellanda, Thorsten Ruf, Walter Bordogna, Sophie Golding, Ali Zeaiter, Markus Abt, Bogdana Balas
PURPOSE: Alectinib, a central nervous system (CNS)-active ALK inhibitor, has demonstrated efficacy and safety in ALK+ non-small-cell lung cancer that has progressed following crizotinib treatment. Other ALK inhibitors have shown concentration-dependent QTc prolongation and treatment-related bradycardia. Therefore, this analysis evaluated alectinib safety in terms of electrophysiologic parameters. METHODS: Intensive triplicate centrally read electrocardiogram (ECG) and matched pharmacokinetic data were collected across two alectinib single-arm trials...
February 27, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28227090/amplitude-based-beat-detection-for-atrial-fibrillation-in-pacemaker
#13
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/28225377/inappropriate-shocks-and-power-delivery-using-adult-automatic-external-defibrillator-pads-in-a-pediatric-patient
#14
Shai Tejman-Yarden, Uriel Katz, Marina Rubinstein, Yehuda Attias, Reem Yahia, David Mishali, Michael Glikson
The use of automatic external defibrillators (AEDs) during pulseless resuscitations is considered safe and reliable, and was established as part of the guidelines in out-of-hospital events. Based on extensive studies, the use of the standard AED is now indicated in every age group with a preference of pediatric pad application for small children and babies. If unavailable, adult pads are recommended. We report a case of 2 inappropriate AED shocks that were delivered to a neonate during a pulseless resuscitation after application of adult pads...
February 21, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28217366/crizotinib-inhibits-hyperpolarization-activated-cyclic-nucleotide-gated-channel-4-activity
#15
Zhushan Zhang, Tai-Qin Huang, Igor Nepliouev, Hengtao Zhang, Adam S Barnett, Paul B Rosenberg, Sai-Hong I Ou, Jonathan A Stiber
BACKGROUND: Sinus bradycardia is frequently observed in patients treated with crizotinib, a receptor tyrosine kinase inhibitor used for the treatment of anaplastic lymphoma kinase (ALK)-rearranged non-small cell lung cancer (NSCLC). We investigated whether crizotinib could influence heart rate (HR) through direct cardiac effects. METHODS: The direct effect of crizotinib on HR was studied using ECG analysis of Langendorff-perfused mouse hearts. The whole-cell patch clamp technique was used to measure the effects of crizotinib on the hyperpolarization-activated funny current, If, in mouse sinoatrial node cells (SANCs) and hyperpolarization-activated cyclic nucleotide-gated channel 4 (HCN4) activity in HEK-293 cells stably expressing human HCN4...
2017: Cardiooncology
https://www.readbyqxmd.com/read/28215570/cardiac-electrophysiology-of-patients-with-spinal-cord-injury
#16
Michael Manogue, David S Hirsh, Michael Lloyd
Spinal cord injury is a clinical syndrome encountered frequently in trauma centers and is accompanied by both acute and chronic heart rhythm abnormalities. The injury is characterized by sympathetic nervous system impairment with preservation of parasympathetic output via the vagus nerve. Severe bradycardia in the form of life-threatening sinus arrest or complete heart block may be observed in the acute recovery phase. Therapy for arrhythmias in the acute phase includes atropine, intravenous chronotropes, methylxanthines for the prevention of episodic bradycardia, and pacemaker implantation in severe cases...
February 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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
#17
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/28205094/knockdown-of-cardiac-kir3-1-gene-with-sirna-can-improve-bradycardia-in-an-experimental-sinus-bradycardia-rat-model
#18
Yang Li, Xiaodan Fu, Zhi Zhang, Bo Yu
The objective of this study was to explore whether the inhibition of potassium inwardly rectifying channel (Kir3.1) with short interfering RNA (siRNA) can improve bradycardia in an experimental sinus bradycardia rat model. 54 Sprague Dawley (SD) rats were randomly divided into three groups: experimental group, control group, and sham group. Sinus bradycardia model was established in SD rats through chemical ablation of sinoatrial (SA) node with 20% formaldehyde. Variations of Kir3.1 expression at mRNA and protein level were examined with qPCR and Western blotting...
February 15, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28204831/tachycardia-bradycardia-syndrome-electrophysiological-mechanisms-and-future-therapeutic-approaches-review
#19
REVIEW
Gary Tse, Tong Liu, Ka Hou Christien Li, Victoria Laxton, Andy On-Tik Wong, Yin Wah Fiona Chan, Wendy Keung, Camie W Y Chan, Ronald A Li
Sick sinus syndrome (SSS) encompasses a group of disorders whereby the heart is unable to perform its pacemaker function, due to genetic and acquired causes. Tachycardia‑bradycardia syndrome (TBS) is a complication of SSS characterized by alternating tachycardia and bradycardia. Techniques such as genetic screening and molecular diagnostics together with the use of pre-clinical models have elucidated the electrophysiological mechanisms of this condition. Dysfunction of ion channels responsible for initiation or conduction of cardiac action potentials may underlie both bradycardia and tachycardia; bradycardia can also increase the risk of tachycardia, and vice versa...
March 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28202630/targets-and-end-points-in-cardiac-autonomic-denervation-procedures
#20
Esteban W Rivarola, Denise Hachul, Tan Wu, Cristiano Pisani, Carina Hardy, Fabrizio Raimundi, Sissy Melo, Francisco Darrieux, Mauricio Scanavacca
BACKGROUND: Autonomic denervation is an alternative approach for patients with symptomatic bradycardia. No consensus exists on the critical targets and end points of the procedure. The aim of this study was to identify immediate end points and critical atrial regions responsible for vagal denervation. METHODS AND RESULTS: We enrolled 14 patients (50% men; age: 34.0±13.8 years) with cardioinhibitory syncope, advanced atrioventricular block or sinus arrest, and no structural heart disease...
February 2017: Circulation. Arrhythmia and Electrophysiology
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