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https://www.readbyqxmd.com/read/28725405/effects-of-food-abundance-and-early-clutch-predation-on-reproductive-timing-in-a-high-arctic-shorebird-exposed-to-advancements-in-arthropod-abundance
#1
Jeroen Reneerkens, Niels Martin Schmidt, Olivier Gilg, Jannik Hansen, Lars Holst Hansen, Jérôme Moreau, Theunis Piersma
Climate change may influence the phenology of organisms unequally across trophic levels and thus lead to phenological mismatches between predators and prey. In cases where prey availability peaks before reproducing predators reach maximal prey demand, any negative fitness consequences would selectively favor resynchronization by earlier starts of the reproductive activities of the predators. At a study site in northeast Greenland, over a period of 17 years, the median emergence of the invertebrate prey of Sanderling Calidris alba advanced with 1...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28725029/prominent-differences-in-left-ventricular-performance-and-myocardial-properties-between-right-ventricular-and-left-ventricular-based-pacing-modes-in-rats
#2
Wesam Mulla, Sharon Etzion, Sigal Elyagon, Roni Gillis, Michael Murninkas, Yuval Konstantino, Ingra Mannhardt, Thomas Eschenhagen, Noah Liel-Cohen, Yoram Etzion
Biventricular pacing is an important modality to improve left ventricular (LV) synchronization and long-term function. However, the biological effects of this treatment are far from being elucidated and existing animal models are limited and demanding. Recently, we introduced an implanted device for double-site epicardial pacing in rats and echocardiographically demonstrated favorable effects of LV and biventricular (LV-based) pacing modes typically observed in humans. Here, this new animal model was further characterized...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724879/infectious-complications-in-patients-with-cardiac-implantable-electronic-devices-risk-factors-prevention-and-prognosis
#3
Anna Polewczyk, Wojciech Jacheć, Aneta Maria Polewczyk, Andrzej Tomasik, Marianna Janion, Andrzej Kutarski
INTRODUCTION    Cardiac device infections (CDI) are still a significant problem. The knowledge of risk factors for CDI is crucial both for preventing infections and reducing mortality. OBJECTIVES    The assesment of the risk factors and long term survival of patients with CDI. PATIENTS AND METHODS    The clinical data of 1837 patients (40.9% CDI) undergoing transvenous leads extraction (TLE) at a single institution from 2006 to 2015 was analyzed. We compared the clinical and procedure-related factors for all types of CDI: isolated pocket infection (IPI), isolated lead-related infective endocarditis (ILRIE) and PI+LRIE...
July 19, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28718277/clinical-implications-of-long-term-ecg-monitoring-from-loop-recorder-to-devices-remote-control
#4
Andrea DI Cori, Raffaele DE Lucia
Long term ECG monitoring has become nowadays an indispensable technology for prevention, management and treatment of many cardiac issues. Today long term ECG monitoring is achievable through loop recorders (LR) and cardiac devices (CIED) like pacemaker (PM), implantable cardioverter-defibrillators (ICDs) and cardiac resynchronization therapy device-defibrillators (CRT- Ds), all of which associated with remote monitoring (RM). Targeted long term ECG monitoring Patients who have recurrent non documented episodes of palpitations, unexplained episodes of syncope, cryptogenic stroke or patients with a cardiomiopathy needing a risk stratification, may benefit from long term ECG monitoring...
July 18, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28714039/current-role-of-echocardiography-in-cardiac-resynchronization-therapy
#5
REVIEW
Donato Mele, Matteo Bertini, Michele Malagù, Marianna Nardozza, Roberto Ferrari
Cardiac resynchronization therapy (CRT) is an established treatment for patients with heart failure and left ventricular systolic dysfunction. Patients are usually assessed by echocardiography, which provides a number of anatomical and functional information used for cardiac dyssynchrony assessment, prognostic stratification, identification of the optimal site of pacing in the left ventricle, optimization of the CRT device, and patient follow-up. Compared to other cardiac imaging techniques, echocardiography has the advantage to be non-invasive, repeatable, and safe, without exposure to ionizing radiation or nefrotoxic contrast...
July 17, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28708290/rationale-and-design-of-the-adaptresponse-trial-a-prospective-randomized-study-of-cardiac-resynchronization-therapy-with-preferential-adaptive-left-ventricular-only-pacing
#6
Gerasimos Filippatos, David Birnie, Michael R Gold, Bart Gerritse, Ahmad Hersi, Sandra Jacobs, Kengo Kusano, Christophe Leclercq, Wilfried Mullens, Bruce L Wilkoff
The AdaptResponse trial is designed to test the hypothesis that preferential adaptive left ventricular-only pacing with the AdaptivCRT(®) algorithm reduces the incidence of the combined endpoint of all-cause mortality and intervention for heart failure (HF) decompensation, compared with conventional cardiac resynchronization therapy (CRT), among patients with a CRT indication, left bundle branch block (LBBB) and normal atrioventricular (AV) conduction. The AdaptResponse study is a prospective, randomized, controlled, single-blinded, multicentre, clinical trial (ClinicalTrials...
July 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28701672/the-shortest-qrs-duration-of-an-electrocardiogram-might-be-an-optimal-electrocardiographic-predictor-for-response-to-cardiac-resynchronization-therapy
#7
Jan-Yow Chen, Kuo-Hung Lin, Kuan-Cheng Chang, Che-Yi Chou
QRS duration has been associated with the response to cardiac resynchronization therapy (CRT). However, the methods for defining QRS duration to predict the outcome of CRT have discrepancies in previous reports. The aim of this study was to determine an optimal measurement of QRS duration to predict the response to CRT.Sixty-one patients who received CRT were analyzed. All patients had class III-IV heart failure, left ventricular ejection fraction not more than 35%, and complete left bundle branch block. The shortest, longest, and average QRS durations from the 12 leads of each electrocardiogram (ECG) were measured...
July 13, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28699408/bridging-the-gap-between-heart-failure-and-the-device-clinic
#8
John Rickard, Bruce L Wilkoff
While cardiac resynchronization therapy (CRT) is a mainstay in the management of selected patients with chronic systolic dysfunction, many patients are noted to experience less than expected or no benefit at all from the therapy. Multidisciplinary care has been shown to provide benefit in follow up for patients receiving CRT devices. Areas Covered: This review will focus on the apparent reasons behind less than optimal outcomes following CRT as well as multidisciplinary approaches to treating patients with CRT devices...
July 12, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28696087/leadless-technology-a-new-paradigm-for-cardiac-pacing
#9
Giulio Zucchelli, Valentina Barletta, Maria G Bongiorni
Leadless pacemaker (LP) technology was recently developed and introduced for clinical purpose as an alternative to traditional systems in order to reduce leads and pocket-related complications. Currently, two self-contained right ventricular pacemaker implanted by using a femoral percutaneous approach have been developed and initial results seem promising. Although the clinical use is still limited to the right ventricular pacing, the LP currently represents a valid and alternative solution in several settings, when the standard pacemaker cannot be used or its use is associated with higher risk of complications...
July 10, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28691201/combined-myocardial-deformation-to-predict-cardiac-resynchronization-therapy-response-in-non-ischemic-cardiomyopathy
#10
Ning Yang, Zhao-Guang Liang, Zhao-Jun Wang, Hui Liu, Chao Chi, Yan-Feng Tian, Shu-Han Qi, Bi-Yu Wang, Wei Han
BACKGROUND: 20-30% of patients do not benefit from CRT when the established selection criteria were applied. We hypothesized that a combined assessment of mechanical dyssynchrony, myocardial deformation and diastolic function would identify patients who would benefit most from CRT. METHOD: In 36 CRT patients, clinical evaluation and echocardiography were performed before and after CRT. Patients were classified into 3 subgroups according to their amount of response: echocardiographic responders, clinical responders, and nonresponders...
July 10, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28690149/creating-a-social-zeitgeber-to-synchronize-family-emotional-rhythms-a-new-therapeutic-approach-in-child-and-adolescent-psychiatry
#11
Matthias Wiss, Sylvie Tordjman
A family can be viewed as a system respecting the principle of homeostasis and therefore considered as a system in equilibrium or out of equilibrium, or even both simultaneously or consecutively. Within a family system, there are oscillatory phenomena and synchronization of the emotional, behavioral and relational rhythms of each member of the family system as well as synchronization of this system with others. A disruption of family synchronies, consisting of successive desynchronizations and resynchronizations, can take place in order for a change to occur...
July 6, 2017: Journal of Physiology, Paris
https://www.readbyqxmd.com/read/28688704/long-term-survival-of-patients-with-left-bundle-branch-block-who-are-hypo-responders-to-cardiac-resynchronization-therapy
#12
Himabindu Vidula, Valentina Kutyifa, Scott McNitt, Ilan Goldenberg, Scott D Solomon, Arthur J Moss, Wojciech Zareba
Guidelines support cardiac resynchronization therapy with a defibrillator (CRT-D) in mild heart failure (HF) patients with left bundle branch block (LBBB). However, not all patients demonstrate echocardiographic or clinical response to CRT-D. We aimed to evaluate the long-term outcomes of echocardiographic hypo-responders and clinical hypo-responders to CRT-D with LBBB in the Multicenter Automatic Defibrillator Implantation Trial with Cardiac Resynchronization Therapy. Five-hundred thirty-four patients with LBBB in the CRT-D arm were followed for 5...
June 13, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28687248/device-therapy-for-rate-control-pacing-resynchronisation-and-av-node-ablation
#13
REVIEW
Dennis H Lau, Anand Thiyagarajah, Stephan Willems, Thomas Rostock, Dominik Linz, Martin K Stiles, David Kaye, Jonathan M Kalman, Prashanthan Sanders
Atrioventricular node ablation (AVNA) is generally reserved for patients whose atrial fibrillation (AF) is refractory all other therapeutic options, since the recipients will often become pacemaker dependent. In such patients, this approach may prove particularly useful, especially if a tachycardia-induced cardiomyopathy is suspected. Historically, an "ablate and pace" approach has involved AVNA and right ventricular pacing, with or without an atrial lead. There is also an evolving role for atrioventricular node ablation in patients with AF who require cardiac resynchronization therapy for treatment of systolic heart failure...
May 31, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28683134/sex-specific-mortality-differences-in-heart-failure-patients-with-ischemia-receiving-cardiac-resynchronization-therapy
#14
Zhonglin Han, Zheng Chen, Rongfang Lan, Wencheng Di, Xiaohong Li, Hongsong Yu, Wenqing Ji, Xinlin Zhang, Biao Xu, Wei Xu
BACKGROUND: Recent studies have reported prognosis differences between male and female heart failure patients following cardiac resynchronization therapy (CRT). However, the potential clinical factors that underpin these differences remain to be elucidated. METHODS: A meta-analysis was performed to investigate the factors that characterize sex-specific differences following CRT. This analysis involved searching the Medline (Pubmed source) and Embase databases in the period from January 1980 to September 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28681477/optimal-image-reconstruction-using-multidetector-row-computed-tomography-to-facilitate-cardiac-resynchronization-therapy
#15
Yu Izawa, Shumpei Mori, Tatsuya Nishii, Hiroki Matsuzoe, Hiroshi Imada, Hideya Suehiro, Kazuhiko Nakayama, Kensuke Matsumoto, Hidekazu Tanaka, Sei Fujiwara, Koji Fukuzawa, Ken-Ichi Hirata
Preprocedural recognition of the segment of latest mechanical contraction along with the anatomy of the coronary venous system is important for successful and effective cardiac resynchronization therapy. We present a case of ischemic cardiomyopathy who underwent implantation of a cardiac resynchronization therapy device with a defibrillator, which was facilitated by preprocedural computed tomographic images reconstructed to visualize the left ventricular slab and the coronary venous system simultaneously on the cardiac contour...
July 2017: Echocardiography
https://www.readbyqxmd.com/read/28680621/development-of-ventricular-fibrillation-after-implantation-of-a-biventricular-implantable-cardioverter-defibrillator-what-is-the-mechanism
#16
Diego Chemello, Fernando Pivatto Júnior, Maurício Pimentel, Leandro Zimerman
Syncopal spells in heart failure patient with cardiovascular implantable electronic devices (CIED) require multiple assessments. T-wave oversensing is a well-described phenomenon that remains significant in modern implantable cardioverter defibrillators (ICD) systems. It can lead to inappropriate therapies and loss of biventricular pacing in those with cardiac resynchronization devices. Strategies to overcome this problem are important.
July 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28679168/risk-stratification-of-cardiovascular-and-heart-failure-hospitalizations-using-integrated-device-diagnostics-in-patients-with-a-cardiac-resynchronization-therapy-defibrillator
#17
Haran Burri, Antoine da Costa, Aurelio Quesada, Renato Pietro Ricci, Stefano Favale, Nicolas Clementy, Gabriele Boscolo, Federico Segura Villalobos, Lorenza Mangoni di S Stefano, Vinod Sharma, Giuseppe Boriani
Aims: Cardiac resynchronization therapy defibrillators (CRT-D) are able to monitor various parameters that may be combined by an automatic algorithm to provide a heart failure risk status (HFRS). We sought to validate the HFRS for stratifying patient risk, evaluate its association with heart failure (HF) symptoms, and investigate its utility for triage of automatic alerts. Methods and results: Data from 722 patients included in the MORE-CARE trial were analysed in a post hoc analysis...
June 30, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28678701/a-planning-and-guidance-platform-for-cardiac-resynchronization-therapy
#18
Peter Mountney, Jonathan M Behar, Daniel Toth, Maria Panayiotou, Sabrina Reiml, Marie-Pierre Jolly, Rashed Karim, Li Zhang, Alexander Brost, Christopher A Rinaldi, Kawal Rhode
Patients with drug-refractory heart failure can greatly benefit from cardiac resynchronization therapy (CRT). A CRT device can resynchronize the contractions of the left ventricle (LV) leading to reduced mortality. Unfortunately 30- 50% of patients do not respond to treatment when assessed by objective criteria such as cardiac remodeling. A significant contributing factor is suboptimal placement of the LV lead. It has been shown that placing this lead away from scar and at the point of latest mechanical activation can improve response rates...
June 27, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28668533/resynchronization-of-ovulation-protocols-for-dairy-cows-including-or-not-including-gonadotropin-releasing-hormone-to-induce-a-new-follicular-wave-effects-on-re-insemination-pattern-ovarian-responses-and-pregnancy-outcomes
#19
R Wijma, M L Stangaferro, M Masello, G E Granados, J O Giordano
Our objectives were to evaluate the pattern of re-insemination, ovarian responses, and pregnancy per artificial insemination (P/AI) of cows submitted to different resynchronization of ovulation protocols. The base protocol started at 25 ± 3 d after artificial insemination (AI) and was as follows: GnRH, 7 and 8 d later PGF2α, GnRH 32 h after second PGF2α, and fixed timed AI (TAI) 16 to 18 h after GnRH. At 18 ± 3 d after AI, cows were randomly assigned to the G25 (n = 1,100) or NoG25 (n = 1,098) treatments...
June 28, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28667454/effects-of-cardiac-resynchronization-therapy-on-right-ventricular-function-during-rest-and-exercise-as-assessed-by-radionuclide-angiography-and-on-nt-probnp-levels
#20
Cinzia Valzania, Mauro Biffi, Rachele Bonfiglioli, Francesco Fallani, Cristian Martignani, Igor Diemberger, Matteo Ziacchi, Jessica Frisoni, Luciana Tomasi, Stefano Fanti, Claudio Rapezzi, Giuseppe Boriani
AIM: We carried out this study to investigate mid-term effects of cardiac resynchronization therapy (CRT) on right ventricular (RV) function and neurohormonal response, expressed by N-terminal pro-brain natriuretic peptide (NT-proBNP), in heart failure patients stratified by baseline RV ejection fraction (RVEF). METHODS AND RESULTS: Thirty-six patients with nonischemic dilated cardiomyopathy underwent technetium-99m radionuclide angiography with bicycle exercise immediately after CRT implantation (during spontaneous rhythm and after CRT activation) and 3 months later...
June 30, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
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