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https://www.readbyqxmd.com/read/27766717/effect-of-ventricular-arrhythmia-ablation-in-patients-with-heart-mate-ii-left-ventricular-assist-devices-an-evaluation-of-ablation-therapy
#1
David Snipelisky, Yogesh N V Reddy, Kevin Manocha, Aalok Patel, Shannon M Dunlay, Paul A Friedman, Thomas M Munger, Samuel J Asirvatham, Douglas L Packer, Yong-Mei Cha, Suraj Kapa, Peter A Brady, Peter A Noseworthy, Joseph J Maleszewski, Siva K Mulpuru
BACKGROUND: Patients with advanced heart failure (HF) are predisposed to ventricular arrhythmias (VAs), particularly following implantation of a left ventricular assist device (LVAD). There is minimal evidence for appropriate management strategies. OBJECTIVES: This study aimed to compare the burden of VA and response to ablation performed either before or following LVAD implantation. METHODS: We created a retrospective cohort of patients who underwent both VA ablation and Heart Mate II (Thoratec, Pleasanton, CA, USA) LVAD implantation at Mayo Clinic (Rochester, MN, USA)...
October 21, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27576196/evaluation-of-feline-uterine-and-umbilical-arteries-blood-flow-in-a-pharmacologically-induced-abnormal-gestation-model
#2
P G Blanco, R Vercellini, A Rube, R Rodríguez, D O Arias, C Gobello
The aim of this study was to describe resistance index (RI) and systolic/diastolic ratio (S/D ratio) of uterine and umbilical arteries in an experimental model of abnormal pregnancy in felids. On days 30 to 35 (32 ± 2.9) after mating, 20 domestic short-hair pregnant queens were randomly assigned to one of the following treatment groups: a treated group (TG; n = 8), which received 10 mg/kg of aglepristone subcutaneously twice, 24 hours apart, and a control nontreated group (CG; n = 12). M-mode and Doppler ultrasonographic evaluations were performed at the initiation of the treatment (Day 0) and then every other day during 8 days...
August 4, 2016: Theriogenology
https://www.readbyqxmd.com/read/27551315/liver-specific-ng37-overexpression-leads-to-diet-dependent-fatty-liver-disease-accompanied-by-cardiac-dysfunction
#3
Xin Zhou, MengMeng Xu, Liyang Wang, Yulian Mu, Rui Feng, Zhilong Dong, Yuexin Pan, Xunzhang Chen, Yongfeng Liu, Shangen Zheng, Donald D Anthony, Jianjie Ma, Williams B Isaacs, Xuehong Xu
BACKGROUND: Environmental factors are well-known causes of diseases. However, aside from a handful of risk indicators, genes' encoding susceptibility to chronic illnesses and their associated environmental triggers are largely unknown. In this era of increasingly rich diets, such genetic predispositions would be immensely helpful from a public health perspective. The novel transgenic mouse model with liver-specific NG37 overexpression characterized in this article identifies the diet-dependent function of NG37 in the pathogenesis of fatty liver disease and cardiac arrhythmia...
2016: Genes & Nutrition
https://www.readbyqxmd.com/read/27533758/effects-of-digitalis-on-mortality-in-a-large-cohort-of-implantable-cardioverter-defibrillator-recipients-results-of-a-long-term-follow-up-study-in-1020-patients
#4
Julia W Erath, Mate Vamos, Stefan H Hohnloser
AIMS: The effects of digitalis on mortality in patients with structural heart disease are controversially discussed. We aimed to assess the effects of digitalis administration in implantable cardioverter defibrillator (ICD) recipients. METHODS AND RESULTS: This retrospective analysis comprises 1020 consecutive patients who received an ICD at our institution and who were followed for up to 10 years (median 37 months). A total of 438 patients were receiving digitalis at the time of ICD implantation and 582 did not...
July 2016: European Heart Journal. Cardiovascular Pharmacotherapy
https://www.readbyqxmd.com/read/27402911/advanced-maternal-age-causes-adverse-programming-of-mouse-blastocysts-leading-to-altered-growth-and-impaired-cardiometabolic-health-in-post-natal-life
#5
M A Velazquez, C G C Smith, N R Smyth, C Osmond, T P Fleming
STUDY QUESTION: Does advanced maternal age (AMA) in mice affect cardiometabolic health during post-natal life in offspring derived from an assisted reproduction technology (ART) procedure? SUMMARY ANSWER: Offspring derived from blastocysts collected from aged female mice displayed impaired body weight gain, blood pressure, glucose metabolism and organ allometry during post-natal life compared with offspring derived from blastocysts from young females; since all blastocysts were transferred to normalized young mothers, this effect is independent of maternal pregnancy conditions...
September 2016: Human Reproduction
https://www.readbyqxmd.com/read/27356851/mechanism-of-uncoupling-protein%C3%A2-2%C3%A2-mediated-myocardial-injury-in-hypothermic-preserved-rat-hearts
#6
Gai-Ge Chen, Jin-Bin Yan, Xu-Ming Wang, Ming-Zhi Zheng, Jian-Ping Jiang, Xin-Mei Zhou, Bin Cai, Yue-Liang Shen
In the present study, the alterations in uncoupling protein 2 (UCP2) expression following hypothermic preservation in rat hearts were investigated. Isolated rat hearts were preserved in Celsior solution for 3‑12 h followed by 60 min of reperfusion. The cardiac function was evaluated using the Langendorff perfusion system. UCP2 and silent mating type information regulation 2 homolog 1 (SIRT1) proteins were detected by western blot analysis. The ATP production and mitochondrial reactive oxygen species (ROS) levels were assessed...
August 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27208803/prevalence-and-predictors-of-metformin-prescribing-in-adults-with-type-2-diabetes-mellitus-a-national-cross-sectional-study
#7
Mate M Soric, John M Moorman, Jaclyn A Boyle, Christine M Dengler-Crish
OBJECTIVE: Metformin is the first-line oral type 2 diabetes treatment. Despite an abundance of evidence, metformin is routinely underused. This study evaluated the rates of metformin use in an appropriate outpatient type 2 diabetes population and identified predictors of metformin use. METHODS: A national cross-sectional study was conducted using data from the National Ambulatory Medical Care Survey. Office visits involving patients aged 18-79 years with a diagnosis of type 2 diabetes were included, and visits involving patients with a diagnosis of chronic renal failure or heart failure were excluded...
July 2016: Pharmacotherapy
https://www.readbyqxmd.com/read/27093953/knockout-of-the-prostaglandin-e2-receptor-subtype-3-promotes-eccentric-cardiac-hypertrophy-and-fibrosis-in-mice
#8
Shuang Liu, Yawei Ji, Jian Yao, Xiaodan Zhao, Hu Xu, Youfei Guan, Richard M Breyer, Hongzhuan Sheng, Jianhua Zhu
BACKGROUND: Prostaglandin E2 receptor subtype 3 (EP3), a Gi protein-coupled receptor activated by prostaglandin E2, plays a particular role in cardioprotection. This study aimed to investigate the impact of EP3 deletion on cardiac remodeling and further elucidate the related involvement of possible signaling pathways. METHODS AND RESULTS: The animals used were EP3 receptor knockout (EP3KO) mice and wild-type (WT) litter mate controls at 16-18 weeks old. The high-resolution echocardiography and weight index indicated that eccentric cardiac hypertrophy might occur in EP3KO mice, which were having worse cardiac function than WT litter mates...
April 18, 2016: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27090167/complete-antegrade-transapical-deployment-of-a-branched-aortic-arch-endograft-a-porcine-feasibility-study
#9
Sabine Wipper, Christina Lohrenz, Jan F Kersten, Mohamad Marwan Akkra, Nikos Tsilimparis, Christian Detter, Yskert von Kodolitsch, Axel Larena-Avellaneda, Eike Sebastian Debus, Tilo Kölbel
PURPOSE: To describe and prove the concept of a technique for complete transapical deployment of a single-branch aortic arch endograft in a porcine model. METHODS: Eight domestic pigs underwent antegrade transapical delivery of a single-branch arch endograft, including a mating stent-graft to the innominate artery. Technical feasibility, operating time, radiation parameters, and hemodynamic changes were studied according to a standardized protocol during baseline (T0), after establishing the transapical access and through-and-through wire (T1), and after stent-graft deployment (T2)...
June 2016: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/27065125/heart-rate-patterns-during-courtship-and-mating-in-rams-and-in-estrous-and-nonestrous-ewes
#10
A Orihuela, J C Omaña, R Ungerfeld
The aim of this study was to compare the heart rate (HR) patterns in rams mated with estrous or nonestrous ewes and in mated estrous and nonestrous ewes () during courtship and mating. For this purpose, HR and behavior were recorded using a radio telemetry recording system and a closed-circuit television system with video recording, respectively. Rams were joined with either an estrous ( = 10) or a nonestrous ( = 10) ewe that was restrained in a stanchion by the neck. Data were continuously recorded until each ram performed 3 ejaculations...
February 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27038779/type-2-diabetes-mellitus-induces-congenital-heart-defects-in-murine-embryos-by-increasing-oxidative-stress-endoplasmic-reticulum-stress-and-apoptosis
#11
Yanqing Wu, E Albert Reece, Jianxiang Zhong, Daoyin Dong, Wei-Bin Shen, Christopher R Harman, Peixin Yang
BACKGROUND: Maternal type 1 and 2 diabetes mellitus are strongly associated with high rates of severe structural birth defects, including congenital heart defects. Studies in type 1 diabetic embryopathy animal models have demonstrated that cellular stress-induced apoptosis mediates the teratogenicity of maternal diabetes leading to congenital heart defect formation. However, the mechanisms underlying maternal type 2 diabetes mellitus-induced congenital heart defects remain largely unknown...
September 2016: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/27022986/influence-of-transiently-increased-nutritional-risk-on-a-left-ventricle-myocardial-mass-assessed-by-echocardiography
#12
Marko Boban, Alessandro Laviano, Viktor Persic, Bojan Biocina, Mate Petricevic, Drazen Zekanovic, Cecilija Rotim, Ivan Aleric, Aleksandar Vcev
BACKGROUND/AIM: Metabolic derangements due to increased nutritional risk lead to catabolism and loss of proteins, muscle tissue and eventually mass of parenchymatous organs. The aim of our study was to assess whether transitory nutritional risk after heart surgery influences on the left ventricle myocardial mass (LVMM), assessed by echocardiography. METHODS: Consecutive sample of patients scheduled for cardiovascular rehabilitation, in period 0-3 months after surgery...
2016: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/26721914/antiplatelet-therapy-and-adverse-hematologic-events-during-heart-mate-ii-support
#13
COMPARATIVE STUDY
Omar Saeed, Aman Shah, Faraj Kargoli, Shivank Madan, Allison P Levin, Snehal R Patel, Rita Jermyn, Cesar Guerrero, Jenni Nguyen, Daniel B Sims, Julia Shin, David D'Alessandro, Daniel J Goldstein, Ulrich P Jorde
BACKGROUND: Hematologic adverse events are common during continuous flow left ventricular assist device support; yet, their relation to antiplatelet therapy, including aspirin (ASA) dosing, is uncertain. METHODS AND RESULTS: A single-center retrospective review of all patients supported by a continuous flow left ventricular assist device (Heart Mate II) from June 2006 to November 2014 was conducted. Patients were categorized into 3 groups: (1) ASA 81 mg+dipyridamole 75 mg daily (n = 26) with a target international normalized ratio (INR) of 2 to 3 from June 2006 to August 2009; (2) ASA 81 mg daily (n = 18) from September 2009 to August 2011 with a target INR of 1...
January 2016: Circulation. Heart Failure
https://www.readbyqxmd.com/read/26701316/the-opportunity-for-post-copulatory-sexual-selection-in-the-ectoparasitic-pea-crab-dissodactylus-primitivus-brachyura-pinnotheridae
#14
Robert B Prather, Stephen M Shuster
Pea crabs, Dissodactylus primitivus, inhabit multiple echinoid (heart urchin) hosts. Male and female crabs move among hosts in search for mates, and both sexes mate multiple times, creating opportunities for post-copulatory sexual selection. For such selection to occur, only a fraction of the males who succeed in mating can also succeed in siring progeny. Jossart et al. 2014 used 4 microsatellite loci to document parentage and mating frequencies of both sexes in D. primitivus. From these data we identified the mean and variance in female offspring numbers, as well as the proportions of the female population that were gravid and not bearing offspring...
2015: PloS One
https://www.readbyqxmd.com/read/26581635/inflammatory-and-fibrotic-processes-are-involved-in-the-cardiotoxic-effect-of-sunitinib-protective-role-of-l-carnitine
#15
Antonio J Blanca, María V Ruiz-Armenta, Sonia Zambrano, José L Miguel-Carrasco, José L Arias, Miguel Arévalo, Alfonso Mate, Oscar Aramburu, Carmen M Vázquez
Sunitinib (Su) is currently approved for treatment of several malignances. However, along with the benefits of disease stabilization, cardiovascular toxicities have also been increasingly recognized. The aim of this study was to analyze which mechanisms are involved in the cardiotoxicity caused by Su, as well as to explore the potential cardioprotective effects of l-carnitine (LC). To this end, four groups of Wistar rats were used: (1) control; (2) rats treated with 400mg LC/kg/day; (3) rats treated with 25mg Su/kg/day; and (4) rats treated with LC+Su simultaneously...
January 22, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/26566220/effects-of-high-intensity-interval-training-on-pregnant-rats-and-the-placenta-heart-and-liver-of-their-fetuses
#16
Nils Thomas Songstad, Knut-Helge Frostmo Kaspersen, Anne Dragøy Hafstad, Purusotam Basnet, Kirsti Ytrehus, Ganesh Acharya
OBJECTIVE: To investigate the effects of high intensity interval training (HIIT) on the maternal heart, fetuses and placentas of pregnant rats. METHODS: Female Sprague-Dawley rats were randomly assigned to HIIT or sedentary control groups. The HIIT group was trained for 6 weeks with 10 bouts of high intensity uphill running on a treadmill for four minutes (at 85-90% of maximal oxygen consumption) for five days/week. After three weeks of HIIT, rats were mated. After six weeks (gestational day 20 in pregnant rats), echocardiography was performed to evaluate maternal cardiac function...
2015: PloS One
https://www.readbyqxmd.com/read/26424149/type-5-adenylyl-cyclase-disruption-leads-to-enhanced-exercise-performance
#17
Dorothy E Vatner, Lin Yan, Lo Lai, Chujun Yuan, Laurent Mouchiroud, Ronald E Pachon, Jie Zhang, Jean-Guillaume Dillinger, Riekelt H Houtkooper, Johan Auwerx, Stephen F Vatner
The most important physiological mechanism mediating enhanced exercise performance is increased sympathetic, beta adrenergic receptor (β-AR), and adenylyl cyclase (AC) activity. This is the first report of decreased AC activity mediating increased exercise performance. We demonstrated that AC5 disruption, that is, knock out (KO) mice, a longevity model, increases exercise performance. Importantly for its relation to longevity, exercise was also improved in old AC5 KO. The mechanism resided in skeletal muscle rather than in the heart, as confirmed by cardiac- and skeletal muscle-specific AC5 KO's, where exercise performance was no longer improved by the cardiac-specific AC5 KO, but was by the skeletal muscle-specific AC5 KO, and there was no difference in cardiac output during exercise in AC5 KO vs...
December 2015: Aging Cell
https://www.readbyqxmd.com/read/26412474/connections-between-nutritional-status-and-proton-pump-inhibitor-therapy-in-patients-scheduled-for-cardiovascular-rehabilitation-after-treatment-for-ischaemic-and-valvular-heart-disease
#18
Marko Boban, Viktor Persic, Mate Petricevic, Bojan Biocina, Tomislav Sipic, Vesna Pehar-Pejcnovic, Sanja Balen, Marinko Zulj, Aleksandar Vcev
BACKGROUND: Multiple and yet uncertain connections exist between cardiovascular diseases and the nutritional status of patients, particularly in relation to cardiovascular treatments. Proton pump inhibitors (PPI) are among the most commonly used group of drugs. AIM: To analyse utilisation of PPI in association with nutritional risk of patients scheduled for rehabilitation after treatment for ischaemic and valvular heart disease. METHODS: Retrospective analyses on a consecutive sample of patients, which included drug utilisation of PPI and nutritional risk screening, using a standardised NRS-2002 tool...
2016: Kardiologia Polska
https://www.readbyqxmd.com/read/26336353/cardiorespiratory-and-metabolic-responses-to-loaded-half-squat-exercise-executed-at-an-intensity-corresponding-to-the-lactate-threshold
#19
José Luis Maté-Muñoz, Raúl Domínguez, Manuel Barba, Antonio J Monroy, Bárbara Rodríguez, Pedro Ruiz-Solano, Manuel V Garnacho-Castaño
This study was designed to identify the blood lactate threshold (LT2) for the half squat (HS) and to examine cardiorespiratory and metabolic variables during a HS test performed at a work intensity corresponding to the LT2. Twenty-four healthy men completed 3 test sessions. In the first, their one-repetition maximum (1RM) was determined for the HS. In the second session, a resistance HS incremental-load test was performed to determine LT2. Finally, in the third session, subjects performed a constant-load HS exercise at the load corresponding to the LT2 (21 sets of 15 repetitions with 1 min of rest between sets)...
September 2015: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/26119599/hatching-behavior-of-eastern-long-necked-turtles-chelodina-longicollis-the-influence-of-asynchronous-environments-on-embryonic-heart-rate-and-phenotype
#20
Jessica K McGlashan, Fiona K Loudon, Michael B Thompson, Ricky-John Spencer
Variable temperatures within a nest cause asynchronous development within clutches of freshwater turtle embryos, yet synchronous hatching occurs and is thought to be an important survival strategy for hatchlings. Metabolic compensation and circadian rhythms in heart rates of embryonic turtles indicate the potential of communication between embryos in a nest. Heart rates were used to identify metabolic circadian rhythms in clutches of an Australian freshwater turtle (Chelodina longicollis) and determine whether embryos metabolically compensate and hatch synchronously when incubated in asynchronous environments...
October 2015: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
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