keyword
MENU ▼
Read by QxMD icon Read
search

Pacemakers

keyword
https://www.readbyqxmd.com/read/28108951/physiological-links-of-circadian-clock-and-biological-clock-of-aging
#1
REVIEW
Fang Liu, Hung-Chun Chang
Circadian rhythms orchestrate biochemical and physiological processes in living organisms to respond the day/night cycle. In mammals, nearly all cells hold self-sustained circadian clocks meanwhile couple the intrinsic rhythms to systemic changes in a hierarchical manner. The suprachiasmatic nucleus (SCN) of the hypothalamus functions as the master pacemaker to initiate daily synchronization according to the photoperiod, in turn determines the phase of peripheral cellular clocks through a variety of signaling relays, including endocrine rhythms and metabolic cycles...
January 20, 2017: Protein & Cell
https://www.readbyqxmd.com/read/28106018/cardioneuroablation-in-the-treatment-of-neurally-mediated-reflex-syncope-a-review-of-the-current-literature
#2
Tolga Aksu, Tümer Erdem Güler, Serdar Bozyel, Kazım Serhan Özcan, Kıvanç Yalın, Ferit Onur Mutluer
OBJECTIVE: An imbalance between parasympathetic and sympathetic tone is a main cause of neurally mediated reflex syncope (NMRS). These patients may be very symptomatic and the condition may require cardiac pacemaker implantation. Cardioneuroablation (CNA) is a relatively novel technique based on radiofrequency ablation of vagal ganglia that can be used in treatment of NMRS. The aim of this analysis was to compare potential role of CNA in patients with NMRS. METHODS: In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Statement, literature search was conducted using the keywords "cardioneuroablation," "vagal denervation," "reflex syncope," "vagal ablation," and "ganglionic plexi ablation...
December 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28105999/transcatheter-aortic-valve-replacement-with-the-portico-valve-one-year-results-of-the-early-canadian-experience
#3
Gidon Y Perlman, Anson Cheung, Eric Dumont, Dion Stub, Danny Dvir, Maria Del Trigo, Marc Pelletier, Sami Alnasser, Jian Ye, David Wood, Christopher Thompson, Philipp Blanke, Jonathon Leipsic, Michael A Seidman, Heather LeBlanc, Christopher E Buller, Josep Rodés-Cabau, John G Webb
AIMS: The aim of this study was to examine the short- and medium-term outcomes of transcatheter aortic valve replacement (TAVR) with the self-expanding and repositionable Portico valve (St. Jude Medical, St. Paul, MN, USA). METHODS AND RESULTS: A total of 57 patients underwent TAVR with the Portico valve between March 2012 and August 2014, representing the first-in-human experience and the entire early experience in Canada. Patients were followed up at 30 days and one year with repeat echocardiography and clinical review...
January 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28105998/simultaneous-transfemoral-aortic-and-transseptal-mitral-valve-replacement-utilising-sapien-3-valves-in-native-aortic-and-mitral-valves
#4
Mohammad Bashir, Gardar Sigurdsson, Phillip A Horwitz, Firas Zahr
AIMS: Concomitant severe calcific aortic and mitral stenosis is a relatively uncommon but very challenging valvular heart disease to manage. We sought to evaluate the feasibility of a fully percutaneous approach to replace both stenotic native mitral and aortic valves using SAPIEN 3 valves. METHODS AND RESULTS: An 87-year-old woman with chronic kidney disease stage 3, pul-monary hypertension, chronic obstructive pulmonary disease, a permanent pacemaker, and atrial fibrillation was referred with Class III heart failure symptoms...
January 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28104716/source-3-registry-design-and-30-day-results-of-the-european-post-approval-registry-of-the-latest-generation-of-the-sapien-3tm-transcatheter-heart-valve
#5
Olaf Wendler, Gerhard Schymik, Hendrik Treede, Helmut Baumgartner, Nicolas Dumonteil, Leo Ihlberg, Franz-Josef Neumann, Giuseppe Tarantini, José L Zamorano, Alec Vahanian
BACKGROUND: -The SOURCE 3 Registry is a European multicentre, observational registry of the latest generation of transcatheter heart valve, the SAPIEN 3(TM) (Edwards Lifesciences, Irvine, CA/USA). Its purpose is to document outcomes of clinical safety and performance after European approval was given. METHODS: -In this manuscript we present the 30-day outcome of the SOURCE 3 Registry. All data is self-reported and all participating centres have committed to support their consecutive experience with the SAPIEN 3(TM) transcatheter heart valve, dependent on patients consent, before the start of the study...
January 19, 2017: Circulation
https://www.readbyqxmd.com/read/28104669/sex-specific-outcomes-with-addition-of-defibrillation-to-resynchronisation-therapy-in-patients-with-heart-failure
#6
Sérgio Barra, Rui Providência, Rudolf Duehmke, Serge Boveda, Eloi Marijon, Christian Reitan, Rasmus Borgquist, Didier Klug, Pascal Defaye, Nicolas Sadoul, Jean-Claude Deharo, Iannish Sadien, Kiran Patel, Khang-Li Looi, David Begley, Anthony W Chow, Jean-Yves Le Heuzey, Sharad Agarwal
OBJECTIVE: Among primary prevention patients with heart failure receiving cardiac resynchronisation therapy (CRT), the impact of additional implantable cardioverter defibrillator (ICD) treatment on outcomes and its interaction with sex remains uncertain. We aim to assess whether the addition of the ICD functionality to CRT devices offers a more pronounced survival benefit in men compared with women, as previous research has suggested. METHODS: Observational multicentre cohort study of 5307 consecutive patients with ischaemic or non-ischaemic dilated cardiomyopathy and no history of sustained ventricular arrhythmias having CRT implantation with (cardiac resynchronisation therapy defibrillator (CRT-D), n=4037) or without (cardiac resynchronisation therapy pacemaker (CRT-P), n=1270) defibrillator functionality...
January 19, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28104484/sick-sinus-syndrome-with-hcn4-mutations-shows-early-onset-and-frequent-association-with-atrial-fibrillation-and-left-ventricular-non-compaction
#7
Taisuke Ishikawa, Seiko Ohno, Takashi Murakami, Kentaro Yoshida, Hiroyuki Mishima, Tetsuya Fukuoka, Hiroki Kimoto, Risa Sakamoto, Takafumi Ohkusa, Takeshi Aiba, Akihiko Nogami, Naokata Sumitomo, Wataru Shimizu, Koh-Ichiro Yoshiura, Hitoshi Horigome, Minoru Horie, Naomasa Makita
BACKGROUND: Familial sick sinus syndrome (SSS) is often attributable to mutations in genes encoding the cardiac Na channel SCN5A and pacemaker channel HCN4. We previously found that SSS with SCN5A mutations shows early onset of manifestations and male predominance. Despite recent reports on the complications of atrial fibrillation (AF) and left ventricular non-compaction (LVNC) in patients with SSS caused by HCN4 mutations, their overall clinical spectrum remains unknown. OBJECTIVE: To investigate the clinical and demographic features of SSS patients carrying HCN4 mutations...
January 16, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28103510/exo-organoplasty-interventions-a-brief-review-of-past-present-and-future-directions-for-advance-heart-failure-management
#8
REVIEW
Waqas Nawaz, Farhan Ullah Khan, Muhammad Zahid Khan, Wang Gang, Mengqi Yang, Xiaoqian Liao, Li Zhang, Awais Ullah Ihsan, Amjad Khan, Lei Han, Xiaohui Zhou
Heart failure (HF) is a debilitating disease in which abnormal function of the heart leads to imbalance of blood demand to tissues and organs. The pathogenesis of HF is very complex and various factors can contribute including myocardial infarction, ischemia, hypertension and genetic cardiomyopathies. HF is the leading cause of death and its prevalence is expected to increase in parallel with the population age. Different kind of therapeutic approaches including lifestyle modification, medication and pacemakers are used for HF patients in NYHA I-III functional class...
January 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28101990/a-single-centre-study-of-1779-heart-transplant-patients-factors-affecting-pacemaker-implantation
#9
P Wellmann, F E M Herrmann, C Hagl, G Juchem
BACKGROUND: After around 10 % of heart transplants patients require pacemaker implantation. The bradyarrhythmias causing pacemaker requirement include sinus node dysfunction (SND) and atrioventricular block (AVB). This study sought to define clinical predictors for pacemaker requirement as well as identify differences in the patient groups developing SND and AVB. METHODS: Our operative data base was used to collect retrospective recipient, donor and operative data of all patients receiving orthotopic heart transplants between 1981 and 2016...
January 19, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28100973/endovascular-treatment-of-superior-vena-cava-syndrome-via-balloon-in-balloon-catheter-technique-with-a-palmaz-stent
#10
Wassim Shatila, Abdelkader Almanfi, Mehran Massumi, Kathryn G Dougherty, Dhaval R Parekh, Neil E Strickman
Superior vena cava syndrome is a well-known disease entity that carries substantial rates of morbidity and mortality. Although most cases of superior vena cava syndrome are secondary to a malignant process, additional causes (such as mediastinal fibrosis, pacemaker lead implantation, or central venous catheter placement) have been reported. Multiple treatment options include percutaneous transluminal angioplasty, stent implantation, thrombolysis, mechanical thrombectomy, and venous grafting. We present a case of superior vena cava syndrome in a symptomatic 30-year-old woman who obtained complete relief of obstruction and marked symptomatic improvement through venoplasty and stenting, aided by our use of a balloon-in-balloon catheter system...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100964/comparative-efficacy-of-nebivolol-and-metoprolol-to-prevent-tachycardia-induced-cardiomyopathy-in-a-porcine-model
#11
Alireza Nazeri, MacArthur A Elayda, Ana Maria Segura, Raymond F Stainback, Joanna Nathan, Vei-Vei Lee, Christina Bove, Luiz Sampaio, Brian Grace, Ali Massumi, Mehdi Razavi
Chronic tachycardia is a well-known cause of nonischemic cardiomyopathy. We hypothesized that nebivolol, a β-blocker with nitric oxide activity, would be superior to a pure β-blocker in preventing tachycardia-induced cardiomyopathy in a porcine model. Fifteen healthy Yucatan pigs were randomly assigned to receive nebivolol, metoprolol, or placebo once a day. All pigs underwent dual-chamber pacemaker implantation. The medication was started the day after the pacemaker implantation. On day 7 after implantation, each pacemaker was set at atrioventricular pace (rate, 170 beats/min), and the pigs were observed for another 7 weeks...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28100340/-outcome-comparison-of-different-therapy-procedures-in-surgical-high-risk-elderly-patients-with-severe-aortic-stenosis
#12
Y Q Ye, Y T Wang, Z Li, M Y Wang, H Y Xu, W J Zhang, Q R Liu, G N Niu, Y J Wu
Objective: To compare the outcome of surgical high-risk elderly patients with severe aortic stenosis(SAS) treated by different therapy procedures, including transcatheter aortic valve implantation(TAVI), surgical aortic valve replacement(SAVR), and drug therapy. Methods: We retrospectively analyzed the clinical data of 242 surgical high-risk elderly (age ≥65 years old) SAS patients hospitalized in Fuwai Hospital between September 2012 and June 2015. According to the treatment method, patients were divided into TAVI group (81 cases), SAVR group (59 cases) and drug therapy group (102 cases)...
January 25, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28096843/left-atrial-myxoma-in-a%C3%A2-patient-with-a%C3%A2-biventricular-pacemaker
#13
Brygida Przywara-Chowaniec, Łukasz Czarnecki, Ewa Nowalny-Kozielska, Maciej Gawlikowski, Mariusz Opara, Agata Puzio, Damian Kawecki, Bartosz Wesołowski
Myxomas make up about 50% of benign cardiac neoplasms. The most common location is within the left atrium. At the initial stage they do not exhibit any specific clinical symptoms, so they are often diagnosed by accident or during examinations recommended for other reasons. Here we present a case of left atrium myxoma in a patient (a man, age 68 years) with a dual chamber pacemaker. The myxoma did not reveal any clinical symptoms and was discovered in echocardiography during routine diagnostic examination preceding pacemaker implantation...
December 2016: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28095413/one-month-global-longitudinal-strain-identifies-patients-who-will-develop-pacing-induced-left-ventricular-dysfunction-over-time-the-pacing-and-ventricular-dysfunction-pavd-study
#14
Fozia Zahir Ahmed, Manish Motwani, Colin Cunnington, Chun Shing Kwok, Catherine Fullwood, Delvac Oceandy, Alan Fitchet, Grahame Kevin Goode, Matthew Luckie, Amir Masood Zaidi, Rajdeep Khattar, Mamas Andreas Mamas
BACKGROUND: Predicting which individuals will have a decline in left ventricular (LV) function after pacemaker implantation remains an important challenge. We investigated whether LV global longitudinal strain (GLS), measured by 2D speckle tracking strain echocardiography, can identify patients at risk of pacing-induced left ventricular dysfunction (PIVD) or pacing-induced cardiomyopathy (PICMP). METHODS: Fifty-five patients with atrioventricular block and preserved LV function underwent dual-chamber pacemaker implantation and were followed with serial transthoracic echocardiography for 12 months for the development of PIVD (defined as a reduction in LV ejection fraction (LVEF) ≥5 percentage points at 12 months) or PICMP (reduction in LVEF to <45%)...
2017: PloS One
https://www.readbyqxmd.com/read/28093099/-infective-endocarditis-clinical-features-and-prognosis-between-2004%C3%A2-and-2014%C3%A2-in-a-non-teaching-hospital
#15
E Capilla, R Poyet, A-V Tortat, J Marchi, F-X Brocq, F Pons, S Kerebel, C Jego, A Mayet, G R Cellarier
AIMS: Despite diagnostic and therapeutic advances, infective endocarditis (IE) remains a severe disease. The aim of the study was to describe clinical features and prognosis of patients with IE in a non-teaching hospital and compare them with current data and a similar study conducted 10 years earlier in the same center. METHODS: We performed a single institution retrospective study including all patients with Duke-Li definite IE between 2004 and 2014. RESULTS: Ninety-four patients were included...
January 13, 2017: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/28092726/pathophysiology-incidence-and-predictors-of-conduction-disturbances-during-transcatheter-aortic-valve-implantation
#16
Marco Barbanti, Simona Gulino, Giuliano Costa, Corrado Tamburino
Over the past decade, transcatheter aortic valve implantation (TAVI) has evolved rapidly toward an extremely reproducible, safe and effective procedure, with a marked reduction of its related complications. However, the occurrence of conduction disturbances and the need for permanent pacemaker implantation (PPI) after TAVI remains a concern. Areas covered: In this article review, we will go through the mechanisms involved in conduction disturbances after TAVI, and we will discuss the key aspects of pathophysiology, incidence and predictors of conduction disturbances following Transcatheter Aortic Valve Implantation...
January 16, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28091409/effect-of-shensong-yangxin-on-the-progression-of-paroxysmal-atrial-fibrillation-is-correlated-with-regulation-of-autonomic-nerve-activity
#17
Hong-Yi Zhao, Shu-Di Zhang, Kai Zhang, Xi Wang, Qing-Yan Zhao, Shu-Juan Zhang, Zi-Xuan Dai, Yong-Sheng Qian, You-Jing Zhang, Hao-Tian Wei, Yan-Hong Tang, Cong-Xin Huang
BACKGROUND: Shensong Yangxin (SSYX), a traditional Chinese herbal medicine, has long been used clinically to treat arrhythmias in China. However, the mechanism of SSYX on atrial fibrillation (AF) is unknown. In this study, we tested the hypothesis that the effect of SSYX on the progression of paroxysmal AF is correlated with the regulation of autonomic nerve activity. METHODS: Eighteen mongrel dogs were randomly divided into control group (n = 6), pacing group (n = 6), and pacing + SSYX group (n = 6)...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28090585/circadian-forced-desynchrony-of-the-master-clock-leads-to-phenotypic-manifestation-of-depression-in-rats
#18
Miriam Ben-Hamo, Tracy A Larson, Leanne S Duge, Carl Sikkema, Charles W Wilkinson, Horacio O de la Iglesia, Mónica M C González
In mammals, a master circadian clock within the suprachiasmatic nucleus (SCN) of the hypothalamus maintains the phase coherence among a wide array of behavioral and physiological circadian rhythms. Affective disorders are typically associated with disruption of this fine-tuned "internal synchronization," but whether this internal misalignment is part of the physiopathology of mood disorders is not clear. To date, depressive-like behavior in animal models has been induced by methods that fail to specifically target the SCN regulation of internal synchronization as the mode to generate depression...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28089877/permanent-pacemaker-implantation-in-octogenarians-with-unexplained-syncope-and-positive-electrophysiologic-study
#19
Georgios Giannopoulos, Charalampos Kossyvakis, Vasiliki Panagopoulou, Dimitrios Tsiachris, Konstantinos Doudoumis, Maria Mavri, Dimitrios Vrachatis, Konstantinos Letsas, Michael Efremidis, Apostolos Katsivas, John Lekakis, Spyridon Deftereos
BACKGROUND: Syncope is a common problem among the elderly and a permanent pacemaker is a therapeutic option when a bradycardic etiology is revealed. However, the benefit of pacing when no association of symptoms to bradycardia has been shown is not clear, especially in the elderly OBJECTIVES: Aim of this study was to evaluate the effect of pacing on syncope-free mortality in patients ≥80 years old, with unexplained syncope and positive invasive electrophysiologic testing (EPS). METHODS: This was an observational study...
January 12, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28089649/magnetic-resonance-imaging-conditional-devices-luxury-or-real-clinical-need
#20
REVIEW
Sophie I Mavrogeni, George Poulos, Genovefa Kolovou, George Theodorakis
Although the risk of MRI scanning on patients with conventional devices is rather lower than initially thought, the patient's safety can only be assured by using MRI-conditional devices. The most important modifications in MRI-conditional devices include: a) Reduction in ferromagnetic components to reduce magnetic attraction and susceptibility artefacts b) Replacement of reed switch by Hall sensor in order to avoid unpredictable reed switch behaviour c) Lead coil design to minimize lead heating and electrical current induction d) Filter circuitry to prevent damage to internal power supply e) Dedicated pacemaker programming to prevent inappropriate pacemaker inhibition and competing rhythms...
January 9, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
keyword
keyword
20035
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"