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Pacemaker programming

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https://www.readbyqxmd.com/read/27908173/pacemaker-and-icd-oversensing-induced-by-movements-near-the-mri-scanner-bore
#1
E Mattei, F Censi, G Calcagnini, R Falsaperla, E Genovese, A Napolitano, V Cannatà
PURPOSE: The effect of the movement near the MRI scanner bore for people with a pacemaker (PM) or an implantable cardioverter defibrillator (ICD) is experimentally evaluated and discussed. METHODS: The authors performed in vitro measurements on a saline-filled human-shaped phantom (male, 170 cm height), equipped first with an MR-conditional PM (bicameral configuration, DDD programming), then with an MR-conditional ICD (biventricular configuration, detection algorithms enable but shock delivery disable)...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27871854/rate-adaptive-pacing-in-an-intracardiac-pacemaker
#2
Michael Lloyd, Dwight Reynolds, Todd Sheldon, Kurt Stromberg, J Harrison Hudnall, Wade M Demmer, Razali Omar, Philippe Ritter, John Hummel, Lluís Mont, Clemens Steinwender, Gabor Z Duray
BACKGROUND: The Micra transcatheter pacemaker was designed to have similar functionality to conventional transvenous VVIR pacing systems. It provides rate adaptive pacing using a programmable 3-axis accelerometer designed to detect patient activity in the presence of cardiac motion. OBJECTIVE: We evaluated the system's performance during treadmill tests to maximum exertion in a subset of patients within the Micra TPS Global Clinical Trial. METHODS: Patients underwent treadmill testing at 3 or 6-months post-implant with algorithm programming at physician discretion...
November 15, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27799257/defibrillators-selecting-the-right-device-for-the-right-patient
#3
Sana M Al-Khatib, Paul Friedman, Kenneth A Ellenbogen
Advances in the field of defibrillation have brought to practice different types of devices that include the transvenous implantable cardioverter-defibrillator (ICD) with or without cardiac resynchronization therapy, the subcutaneous ICD (S-ICD), and the wearable cardioverter-defibrillator. To ensure optimal use of these devices and to achieve best patient outcomes, clinicians need to understand how these devices work, learn the characteristics of patients who qualify them for one type of device versus another, and recognize the remaining gaps in knowledge surrounding these devices...
November 1, 2016: Circulation
https://www.readbyqxmd.com/read/27738069/safety-of-magnetic-resonance-scanning-without-monitoring-of-patients-with-pacemakers
#4
Litten Bertelsen, Helen Høgh Petersen, Berit Thornvig Philbert, Jesper Hastrup Svendsen, Carsten Thomsen, Niels Vejlstrup
AIMS: The objective of this study was to investigate whether it is safe to perform 1.5-Tesla magnetic resonance imaging (MRI) scans in pacemaker (PM) patients without pulse oximetry or electrocardiogram monitoring and with no special specific absorption rate (SAR) or time limits, provided that the PMs are interrogated and programmed to asynchronous mode prior to the scan. METHODS AND RESULTS: This study reports the outcome of 207 MRI scans on PM patients at Rigshospitalet, Copenhagen University Hospital from June 2010 to September 2013...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27738057/clinically-guided-pacemaker-choice-and-setting-pacemaker-expert-programming-study
#5
Matteo Ziacchi, Pietro Palmisano, Ernesto Ammendola, Gabriele Dell'era, Federico Guerra, Stefano Aquilani, Vittorio Aspromonte, Giuseppe Boriani, Michele Accogli, Giuseppe Del Giorno, Eraldo Occhetta, Alessandro Capucci, Renato Pietro Ricci, Giampiero Maglia, Mauro Biffi
AIM: The aim of this multicentre, observational, transversal study was to evaluate pacemaker (PM) choice and setting in a large number of patients, in order to understand their relationship with the patients' clinical characteristics. METHODS AND RESULTS: The study enrolled a total of 1858 patients (71 ± 14 years, 54% male), consecutively evaluated during scheduled PM follow-up visits in 7 Italian cardiac arrhythmia centres. To evaluate the appropriateness of PM choice in relation to the patients' clinical characteristics, we analysed their rhythm disorders at the time of device implantation and the characteristics of the devices implanted...
October 13, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27706012/sacral-neuromodulation-in-patients-with-a-cardiac-pacemaker
#6
Abdullah A Gahzi, Dean S Elterman, Magdy Hassouna
The objective of this study was to describe our experience using sacral neuromodulation to treat urinary urgency, frequency, urge incontinence, and chronic urinary retention in patients with cardiac pacemakers. With the increasingly widespread use of InterStim for bladder function restoration, we are seeing more complex patients with multiple comorbidities, including cardiac conditions. Herein, we report 3 cases of individuals with cardiac pacemakers who underwent InterStim implantation to treat urinary conditions...
September 2016: International Neurourology Journal
https://www.readbyqxmd.com/read/27703389/ineffective-esophageal-motility-and-the-vagus-current-challenges-and-future-prospects
#7
Ji-Hong Chen
Ineffective esophageal motility (IEM) is characterized by low to very low amplitude propulsive contractions in the distal esophagus, hence primarily affecting the smooth muscle part of the esophagus. IEM is often found in patients with dysphagia or heartburn and is commonly associated with gastroesophageal reflux disease. IEM is assumed to be associated with ineffective bolus transport; however, this can be verified using impedance measurements or evaluation of a barium coated marshmallow swallow. Furthermore, water swallows may not assess accurately the motor capabilities of the esophagus, since contraction amplitude is strongly determined by the size and consistency of the bolus...
2016: Clinical and Experimental Gastroenterology
https://www.readbyqxmd.com/read/27695369/a-simple-wide-bandwidth-biopotential-amplifier-to-record-pacemaker-pulse-waveform
#8
Paolo Bifulco, Gaetano Dario Gargiulo, Maria Romano, Mario Cesarelli
Reliable detection of pacemaker pulses is getting more and more important in electrocardiography (ECG) diagnosis. Many studies recommend ECG amplifiers with higher bandwidth to prevent errors. In the past, few pilot studies showed that analysis of pacemaker pulses waveform can enhance diagnosis (eg, lead failure and fractured wire), but they were carried out with inadequate instrumentations for clinical practice. Typically, pacemaker pulses last hundreds of microseconds, edges of pulses elapse in few microseconds, and amplitude may exhibit large variations from few millivolts to volts...
2016: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/27651007/position-paper-for-management-of-elderly-patients-with-pacemakers-and-implantable-cardiac-defibrillators-groupe-de-rythmologie-et-stimulation-cardiaque-de-la-soci%C3%A3-t%C3%A3-fran%C3%A3-aise-de-cardiologie-et-soci%C3%A3-t%C3%A3-fran%C3%A3-aise-de-g%C3%A3-riatrie-et-g%C3%A3-rontologie
#9
Laurent Fauchier, Christine Alonso, Frédéric Anselme, Hugues Blangy, Pierre Bordachar, Serge Boveda, Nicolas Clementy, Pascal Defaye, Jean-Claude Deharo, Patrick Friocourt, Daniel Gras, Franck Halimi, Didier Klug, Jacques Mansourati, Benjamin Obadia, Jean-Luc Pasquié, Dominique Pavin, Nicolas Sadoul, Jérôme Taieb, Olivier Piot, Olivier Hanon
Despite the increasingly high rate of implantation of pacemakers (PM) and cardioverter-defibrillators (ICD) in elderly patients, data supporting their clinical and cost-effectiveness in this age stratum are ambiguous and contradictory. We reviewed the data regarding the applicability, safety, and effectiveness of the conventional pacing, ICD and cardiac resynchronization therapy (CRT) in elderly patients. Although peri-procedural risk may be slightly higher in the elderly, the procedure of implantation of PMs and ICDs is still relatively safe in this age group...
September 1, 2016: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement
https://www.readbyqxmd.com/read/27650461/the-scn-clock-governs-circadian-transcription-rhythms-in-murine-epididymal-white-adipose-tissue
#10
Isa Kolbe, Jana Husse, Gabriela Salinas, Thomas Lingner, Mariana Astiz, Henrik Oster
The circadian master pacemaker in the suprachiasmatic nucleus (SCN) orchestrates peripheral clocks in various organs and synchronizes them with external time, including those in adipose tissue, which displays circadian oscillations in various metabolic and endocrine outputs. Because our knowledge about the instructive role of the SCN clock on peripheral tissue function is based mainly on SCN lesion studies, we here used an alternative strategy employing the Cre/loxP system to functionally delete the SCN clock in mice...
September 20, 2016: Journal of Biological Rhythms
https://www.readbyqxmd.com/read/27644061/pausing-with-the-gauze-inhibition-of-temporary-pacemakers-by-radiofrequency-scan-during-cardiac-surgery
#11
Matthew R Williams, Douglas B Atkinson, Vassilios J Bezzerides, Yuki Koichi, Kathryn Franklin, Alfonso Casta, Mark E Alexander
BACKGROUND: Radiofrequency identification (RFID) detection systems are used to detect retained surgical sponges and may cause electromagnetic interference (EMI), altering intended function of cardiac pacing systems. Three pediatric patients requiring temporary pacing for postoperative atrioventricular block experienced transient inhibition of ventricular pacing during the use of RFID detection system. Bench testing was performed to evaluate the mechanism of pacemaker inhibition. METHODS: Impedance of temporary pacing wires was obtained using a pacing system analyzer...
September 16, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27625082/olmesartan-reduces-new-onset-atrial-fibrillation-and-atrial-fibrillation-burden-after-dual-chamber-pacemaker-implantation-in-atrioventricular-block-patients
#12
Hang Zhang, Chang Pan, Juan Zhang, Lin-Lin Zhu, Kai Huang, Yun Zhong, Zuo-Ying Hu
BACKGROUND: Atrial fibrillation (AF) is the most frequent tachyarrhythmia in patients with a permanent pacemaker. Angiotensin II receptor antagonists have a protective effect against the occurrence of AF in patients with heart diseases. This study aimed to assess the effectiveness of olmesartan in the prevention of new-onset AF and AF burden in atrioventricular block (AVB) patients with dual-chamber (DDD) pacemaker implantation. METHODS: This was a single-center, prospective, randomized, single-blind, controlled clinical study...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27613649/anodal-stimulation-in-two-dogs-with-transvenous-permanent-bipolar-pacemakers
#13
M A Oyama, M J Hezzell, D S Laughlin, C L Thorn, M S Kraus, A R Gelzer
Management of symptomatic bradyarrhythmias such as complete atrioventricular block often involves permanent implantation of a transvenous pacemaker. Both during and after implantation, the operator can telemetrically assess and adjust a variety of electrical parameters associated with the pacemaker function in order to optimize the sensitivity, reliability, and power consumption of the device. Herein, we report an unexpected change in the paced electrocardiographic QRS complex morphology in two dogs undergoing bipolar pacing associated with changes in the pacemaker output amplitude settings first detected during threshold testing...
September 6, 2016: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/27595465/position-paper-for-management-of-elderly-patients-with-pacemakers-and-implantable-cardiac-defibrillators-groupe-de-rythmologie-et-stimulation-cardiaque-de-la-soci%C3%A3-t%C3%A3-fran%C3%A3-aise-de-cardiologie-and-soci%C3%A3-t%C3%A3-fran%C3%A3-aise-de-g%C3%A3-riatrie-et-g%C3%A3-rontologie
#14
Laurent Fauchier, Christine Alonso, Frederic Anselme, Hugues Blangy, Pierre Bordachar, Serge Boveda, Nicolas Clementy, Pascal Defaye, Jean-Claude Deharo, Patrick Friocourt, Daniel Gras, Franck Halimi, Didier Klug, Jacques Mansourati, Benjamin Obadia, Jean-Luc Pasquié, Dominique Pavin, Nicolas Sadoul, Jerome Taieb, Olivier Piot, Olivier Hanon
Despite the increasingly high rate of implantation of pacemakers (PMs) and implantable cardioverter defibrillators (ICDs) in elderly patients, data supporting their clinical and cost-effectiveness in this age stratum are ambiguous and contradictory. We reviewed the data regarding the applicability, safety and effectiveness of conventional pacing, ICDs and cardiac resynchronization therapy (CRT) in elderly patients. Although periprocedural risk may be slightly higher in the elderly, the implantation procedure for PMs and ICDs is still relatively safe in this age group...
October 2016: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/27550834/compatibility-of-radiofrequency-surgical-sponge-detection-technology-with-cardiac-implantable-electronic-devices-and-temporary-pacemakers
#15
Jonathan D Salcedo, Victor G Pretorius, Jonathan C Hsu, Gautam G Lalani, Amir A Schricker, Shrinivas M Hebsur, Thomas J McGARRY, Jessica A Hunter, Kathryn E Lewis, David E Krummen, Gregory K Feld, Ulrika Birgersdotter-Green
BACKGROUND: Radiofrequency (RF) technology has improved detection of retained surgical sponges with a reported 100% sensitivity and specificity. However, the potential for interactions of the RF signals emitted by the detection system with cardiac implantable electronic devices (CIEDs) or temporary pacemakers may limit its use in those patients with these devices. This study investigated whether RF detection technology causes interference or clinically significant changes in the programmed settings of implanted pacemakers and defibrillators or temporary epicardial pacemakers...
November 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27479324/circadian-neuron-feedback-controls-the-drosophila-sleep-activity-profile
#16
Fang Guo, Junwei Yu, Hyung Jae Jung, Katharine C Abruzzi, Weifei Luo, Leslie C Griffith, Michael Rosbash
Little is known about the ability of Drosophila circadian neurons to promote sleep. Here we show, using optogenetic manipulation and video recording, that a subset of dorsal clock neurons (DN1s) are potent sleep-promoting cells that release glutamate to directly inhibit key pacemaker neurons. The pacemakers promote morning arousal by activating these DN1s, implying that a late-day feedback circuit drives midday siesta and night-time sleep. To investigate more plastic aspects of the sleep program, we used a calcium assay to monitor and compare the real-time activity of DN1 neurons in freely behaving males and females...
August 18, 2016: Nature
https://www.readbyqxmd.com/read/27435910/septic-pulmonary-embolism-caused-by-infected-pacemaker-leads-after-replacement-of-a-cardiac-resynchronization-therapy-device
#17
Salah A M Said, Rogier Nijhuis, Anita Derks, Herman Droste
BACKGROUND Cardiac resynchronization therapy (CRT) has been demonstrated to reduce morbidity and mortality in patients with advanced, drug-refractory heart failure. Procedure-related mortality is less than 1% in larger studies. Approximately10% of CRT patients have to undergo surgical revision because of infections, dislocations, or unacceptable electrical behavior manifested as high threshold, unstable sensing, or unwanted phrenic nerve stimulation. CASE REPORT A 70-year-old man with symptomatic congestive heart failure underwent implantation of a biventricular pacemaker on the left anterior chest wall in 2003 and pulse generator exchange in August 2009...
2016: American Journal of Case Reports
https://www.readbyqxmd.com/read/27346344/gsk-3-and-ck2-kinases-converge-on-timeless-to-regulate-the-master-clock
#18
Deniz Top, Emily Harms, Sheyum Syed, Eliza L Adams, Lino Saez
The molecular clock relies on a delayed negative feedback loop of transcriptional regulation to generate oscillating gene expression. Although the principal components of the clock are present in all circadian neurons, different neuronal clusters have varying effects on rhythmic behavior, suggesting that the clocks they house are differently regulated. Combining biochemical and genetic techniques in Drosophila, we identify a phosphorylation program native to the master pacemaker neurons that regulates the timing of nuclear accumulation of the Period/Timeless repressor complex...
July 12, 2016: Cell Reports
https://www.readbyqxmd.com/read/27322021/cardiac-electrophysiology-laboratories-a-potential-target-for-antimicrobial-stewardship-and-quality-improvement
#19
Westyn Branch-Elliman, Maggie Stanislawski, Judith Strymish, Anna E Barón, Kalpana Gupta, Paul D Varosy, Howard S Gold, P Michael Ho
BACKGROUND Infections following cardiovascular implantable electronic device (CIED) procedures, including pacemaker and implantable cardioverter-defibrillators, are devastating and costly. Preimplantation prophylactic antimicrobials are effective for reducing postprocedural infections. However, routine postprocedural antimicrobials are not associated with improved outcomes, and they may be harmful. Thus, we sought to characterize antimicrobial use patterns following CIED procedures. DESIGN All patients who underwent CIED procedures from October 1, 2007 to September 30, 2013 and had procedural information entered into the VA Clinical Assessment Reporting and Tracking (CART) software program were included in this study...
September 2016: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/27305923/automatic-management-of-atrial-and-ventricular-stimulation-in-a-contemporary-unselected-population-of-pacemaker-recipients-the-essential-registry
#20
Mauro Biffi, Matteo Bertini, Davide Saporito, Giuseppina Belotti, Fabio Quartieri, Maurizio Piancastelli, Angelo Pucci, Giulio Boggian, Gian Franco Mazzocca, Davide Giorgi, Paolo Diotallevi, Igor Diemberger, Cristian Martignani, Stefano Pancaldi, Matteo Ziacchi, Lina Marcantoni, Tiziano Toselli, Simone Attala, Matteo Iori, Nicola Bottoni, Selina Argnani, Corrado Tomasi, Biagio Sassone, Giuseppe Boriani
AIMS: We investigated the applicability of the Ventricular Capture Control (VCC) and Atrial Capture Control (ACC) algorithms for automatic management of cardiac stimulation featured by Biotronik pacemakers in a broad, unselected population of pacemaker recipients. METHODS AND RESULTS: Ventricular Capture Control and Atrial Capture Control were programmed to work at a maximum adapted output voltage as 4.8 V in consecutive recipients of Biotronik pacemakers. Ambulatory threshold measurements were made 1 and 12 months after pacemaker implant/replacement in all possible pacing/sensing configurations, and were compared with manual measurements...
June 14, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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