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https://www.readbyqxmd.com/read/28213402/a-novel-method-of-standardized-myocardial-infarction-in-aged-rabbits
#1
Patrick J Morrissey, Kevin R Murphy, Jean M Daley, Lorraine Schofield, Nilufer N Turan, Karuppiah Arunachalam, J Dawn Abbott, Gideon Koren
The incidence of myocardial infarction (MI) and sudden cardiac death increases with age. Here we describe the development of a minimally invasive large animal model of MI that can be applied to young or aged animals. We demonstrate that rabbit coronary anatomy is highly variable, more so than described in previous literature. In this work we categorize the coronary pattern of 37 young and 63 aged rabbits. Aged rabbits had a higher degree of branching from the left main coronary artery. Standardizing the model across age cohorts required a new approach, targeting an area of myocardium rather than a specific vessel...
February 17, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28204966/inhibition-of-the-renin-angiotensin-system-post-myocardial-infarction-prevents-inflammation-associated-acute-cardiac-rupture
#2
Xiao-Ming Gao, Alan Tsai, Annas Al-Sharea, Yidan Su, Shirley Moore, Li-Ping Han, Helen Kiriazis, Anthony M Dart, Andrew J Murphy, Xiao-Jun Du
PURPOSE: Inhibition of the renin-angiotensin system (RAS) is beneficial in patient management after myocardial infarction (MI). However, whether RAS inhibition also provides cardiac protection in the acute phase of MI is unclear. METHODS: Male 129sv mice underwent coronary artery occlusion to induce MI, followed by treatment with losartan (L, 20 and 60 mg/kg), perindopril (P, 2 and 6 mg/kg), amlodipine (20 mg/kg as a BP-lowering agent) or vehicle as control. Drug effects on hemodynamics were examined...
February 15, 2017: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/28203792/accuracy-and-precision-of-non-invasive-cardiac-output-monitoring-devices-in-perioperative-medicine-a-systematic-review-and-meta-analysis%C3%A2
#3
A Joosten, O Desebbe, K Suehiro, L S-L Murphy, M Essiet, B Alexander, M-O Fischer, L Barvais, L Van Obbergh, D Maucort-Boulch, M Cannesson
No abstract text is available yet for this article.
March 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28196901/novel-variant-in-the-ank2-membrane-binding-domain-is-associated-with-ankyrin-b-syndrome-and-structural-heart-disease-in-a-first-nations-population-with-a-high-rate-of-long-qt-syndrome
#4
Leigh Anne Swayne, Nathaniel P Murphy, Sirisha Asuri, Lena Chen, Xiaoxue Xu, Sarah McIntosh, Chao Wang, Peter J Lancione, Jason D Roberts, Charles Kerr, Shubhayan Sanatani, Elizabeth Sherwin, Crystal F Kline, Mingjie Zhang, Peter J Mohler, Laura T Arbour
BACKGROUND: Long QT syndrome confers susceptibility to ventricular arrhythmia, predisposing to syncope, seizures, and sudden death. While rare globally, long QT syndrome is ≈15× more common in First Nations of Northern British Columbia largely because of a known mutation in KCNQ1. However, 2 large multigenerational families were affected, but negative for the known mutation. METHODS AND RESULTS: Long QT syndrome panel testing was carried out in the index case of each family, and clinical information was collected...
January 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28153915/long-but-not-short-term-estradiol-treatment-induces-renal-damage-in-midlife-ovariectomized-long-evans-rats
#5
Margaret A Zimmerman, Dillion D Hutson, Emma H Trimmer, Shreya N Kashyap, Jennifer L Duong, Brennah Murphy, Elin M Grissom, Jill M Daniel, Sarah H Lindsey
Clinical recommendations limit menopausal hormone therapy to a few years, yet the impact of a shorter treatment duration on cardiovascular health is unknown. We hypothesized that both short- and long-term estradiol (E2) treatment exerts positive and lasting effects on blood pressure, vascular reactivity, and renal health. This study was designed to mimic midlife menopause, followed by E2 treatment, that either followed or exceeded the current clinical recommendations. Female Long-Evans retired breeders were ovariectomized (OVX) at 11 mo of age and randomized into three groups: 80-day (80d) vehicle (Veh>Veh), 40-day (40d) E2 + 40d vehicle (E2>Veh), and 80d E2 (E2>E2)...
February 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28130388/stress-management-training-should-be-an-integral-component-of-cardiac-rehabilitation
#6
Barbara M Murphy
No abstract text is available yet for this article.
January 27, 2017: Evidence-based Medicine
https://www.readbyqxmd.com/read/28129780/manubrium-limited-ministernotomy-versus-conventional-sternotomy-for-aortic-valve-replacement-mavric-study-protocol-for-a-randomised-controlled-trial
#7
Enoch Akowuah, Andrew T Goodwin, W Andrew Owens, Helen C Hancock, Rebecca Maier, Adetayo Kasim, Adrian Mellor, Khalid Khan, Gavin Murphy, James Mason
BACKGROUND: Aortic valve replacement is one of the most common cardiac surgical procedures performed worldwide. Conventional aortic valve replacement surgery is performed via a median sternotomy; the sternum is divided completely from the sternal notch to the xiphisternum. Minimally invasive aortic valve replacement, using a new technique called manubrium-limited ministernotomy, divides only the manubrium from the sternal notch to 1 cm below the manubrio-sternal junction. More than one third of patients undergoing conventional sternotomy develop clinically significant bleeding requiring post-operative red blood cell transfusion...
January 28, 2017: Trials
https://www.readbyqxmd.com/read/28096168/sk-channel-enhancers-attenuate-ca2-dependent-arrhythmia-in-hypertrophic-hearts-by-regulating-mito-ros-dependent-oxidation-and-activity-of-ryr
#8
Tae Yun Kim, Radmila Terentyeva, Karim H F Roder, Weiyan Li, Man Liu, Ian Greener, Shanna Hamilton, Iuliia Polina, Kevin R Murphy, Richard T Clements, Samuel C Dudley, Gideon Koren, Bum-Rak Choi, Dmitry Terentyev
AIM: s: Plasmamembrane small conductance Ca<su2+p>-activated K<su+ p > (SK) channels were implicated in ventricular arrhythmias in infarcted and failing hearts. Recently, SK channels were detected in the mitochondria inner membrane (mSK), and their activation protected from acute ischemia-reperfusion injury by reducing intracellular levels of reactive oxygen species (ROS). We hypothesized that mSK play an important role in regulating mitochondrial function in chronic cardiac diseases...
January 17, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28078762/competence-in-the-use-of-supraglottic-airways-by-australian-surf-lifesavers-for-cardiac-arrest-ventilation-in-a-manikin
#9
Lachlan Holbery-Morgan, Cara Angel, Michelle Murphy, James Carew, Finn Douglas, Robert Murphy, Natalie Hood, Andrew Rechtman, Christopher Scarff, Nicholas Simpson, Andrew Stewardson, Daniel Steinfort, Sam Radford, Ned Douglas, Douglas Johnson
OBJECTIVES: Lifesavers in Australia are taught to use pocket mask (PM) rescue breathing and bag valve mask (BVM) ventilation, despite evidence that first responders might struggle with these devices. Novices have successfully used the Laryngeal Mask Airway (LMA) Supreme and iGel devices previously, but there has been no previous comparison of the ability to train lifesavers to use the supraglottic airways compared to standard techniques for cardiac arrest ventilation. METHODS: The study is a prospective educational intervention whereby 113 lifesavers were trained to use the LMA and iGel supraglottic airways...
February 2017: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/28062625/high-sensitivity-troponin-i-in-stable-patients-with-atherosclerotic-disease-in-the-tra-2%C3%A2-p-timi-50-trial
#10
Alon Eisen, Marc P Bonaca, Petr Jarolim, Benjamin M Scirica, Harvey D White, Michal Tendera, Mikael Dellborg, Jose C Nicolau, Joao Morais, Keith A A Fox, Erin A Bohula, Sabina A Murphy, Eugene Braunwald, David A Morrow
BACKGROUND: Cardiac troponin I, measured with a high-sensitivity assay (hs-TnI), is well-established for risk prediction in acute coronary syndromes. However, its prognostic role in stable atherosclerotic disease, particularly for future myocardial infarction (MI), is less well defined. METHODS: We measured hs-TnI (Abbott ARCHITECT) in 15833 patients with prior MI, ischemic stroke, or peripheral arterial disease from the placebo-controlled Thrombin Receptor Antagonist in Secondary Prevention of Atherothrombotic Ischemic Events (TRA 2°P)-Thrombolysis in Myocardial Infarction (TIMI) 50 trial of the platelet inhibitor vorapaxar, excluding patients with recent MI (<30 days)...
January 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28052716/tripartite-stratification-of-the-glasgow-coma-scale-in-children-with-severe-traumatic-brain-injury-and-mortality-an-analysis-from-a-multicenter-comparative-effectiveness-study
#11
Sarah Murphy, Neal J Thomas, Shira Gertz, John Beca, James F Luther, Michael J Bell, Steven R Wisniewski, Adam Hartman, Robert Tasker
The Glasgow Coma Scale (GCS) score has not been validated in children < 5y and the clinical circumstances at the time of assignment can limit its applicability. This study describes the distribution of GCS scores in the population, the relationship between injury characteristics with the GCS score and the association between the tripartite stratification of the GCS on mortality in children with severe traumatic brain injury (TBI). The first 200 children from a multicenter, comparative effectiveness study in severe TBI (inclusion criteria [age 0 - 18 y, GCS ≤ 8 at the time of ICP monitoring] were analyzed...
January 4, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28034901/body-mass-index-and-mortality-among-adults-undergoing-cardiac-surgery-a-nationwide-study-with-a-systematic-review-and-meta-analysis
#12
Giovanni Mariscalco, Marcin J Woźniak, Alan G Dawson, Giuseppe F Serraino, Richard Porter, Mintu Nath, Catherine Klersy, Tracy Kumar, Gavin J Murphy
BACKGROUND: -In an apparent paradox morbidity and mortality are lower in obese patients undergoing cardiac surgery, although the nature of this association is unclear. We sought to determine whether the obesity paradox observed in cardiac surgery is attributable to reverse epidemiology, bias, or confounding. METHODS: -Data from the National Adult Cardiac Surgery registry for all cardiac surgical procedures performed between April 2002 and March 2013 were extracted...
December 28, 2016: Circulation
https://www.readbyqxmd.com/read/28025038/incidence-and-risk-of-cardiac-events-in-patients-with-previously-treated-multiple-myeloma-versus-matched-patients-without-multiple-myeloma-an-observational-retrospective-cohort-study
#13
Kristin D Kistler, Jill Kalman, Gagan Sahni, Brian Murphy, Winifred Werther, Kanya Rajangam, Ajai Chari
BACKGROUND: Multiple myeloma (MM) patients have age-, disease-, and treatment-related risk factors for cardiac events. MATERIALS AND METHODS: We analyzed the 2006 to 2011 MarketScan database to determine whether the risk of cardiac events is greater in MM patients than in non-MM patients. Included were 1723 MM patients treated with corticosteroids and ≥ 3 drugs (bortezomib, immunomodulatory derivatives, and alkylating agents or anthracyclines). The index date (ID) was the date on which the 3-drug exposure criterion was met...
November 22, 2016: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/27974973/day-of-surgery-admission-in-total-joint-arthroplasty-why-are-surgeries-cancelled-an-analysis-of-3195-planned-procedures-and-114-cancellations
#14
David M Dalton, Enda G Kelly, Terence P Murphy, Gerry F McCoy, Aaron A Glynn
Background. Day of surgery admission (DOSA) is becoming standard practice as a means of reducing cost in total joint arthroplasty. Aims. The aim of our study was to audit the use of DOSA in a specialty hospital and identify reasons for cancellation. Methods. A retrospective study of patients presenting for hip or knee arthroplasty between 2008 and 2013 was performed. All patients were assessed at the preoperative assessment clinic (PAC). Results. Of 3195 patients deemed fit for surgery, 114 patients (3.5%) had their surgery cancelled...
2016: Advances in Orthopedics
https://www.readbyqxmd.com/read/27852953/effectiveness-of-an-exercise-programme-on-physical-function-in-patients-discharged-from-hospital-following-critical-illness-a-randomised-controlled-trial-the-revive-trial
#15
Kathryn McDowell, Brenda O'Neill, Bronagh Blackwood, Chris Clarke, Evie Gardner, Paul Johnston, Michaeline Kelly, John McCaffrey, Brian Mullan, Sally Murphy, T John Trinder, Gavin Lavery, Daniel F McAuley, Judy M Bradley
OBJECTIVE: To investigate the effectiveness of a 6-week exercise programme in patients discharged home following critical illness compared with standard care. DESIGN: Multicentre prospective phase II randomised controlled trial, with blinded outcome assessment after hospital discharge, following the 6-week intervention and at 6 months. PARTICIPANTS: 60 patients (30 per group) aged ≥18 years, mechanically ventilated >96 hours, and not in other rehabilitation, that is, cardiac or pulmonary rehabilitation programmes...
November 15, 2016: Thorax
https://www.readbyqxmd.com/read/27850154/514-contemporary-epidemiology-of-catheter-related-thrombosis-in-the-pediatric-cardiac-icu
#16
Lee Murphy, Christopher Mastropietro
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27816171/reliable-exclusion-of-prognostically-significant-coronary-disease-in-left-ventricular-dysfunction-by-cardiac-mri
#17
A C M Thompson, J G Crilley, D W Wilson, A P S Hungin, A Fuat, J J M Murphy
AIM: To assess the ability of cardiac magnetic resonance (CMR) to exclude prognostically significant coronary artery disease (CAD) in patients with left ventricular systolic dysfunction (LVSD). MATERIALS AND METHODS: A cohort of patients who underwent both X-ray angiography and CMR since 2006 was reviewed retrospectively. Records of those with European criteria for LVSD (left ventricular ejection fraction [LVEF] <50% or LV end-diastolic volume index [LVEDVI] ≥97 ml/m(2)) on CMR or transthoracic echo were analysed...
February 2017: Clinical Radiology
https://www.readbyqxmd.com/read/27779776/a-phase-i-study-to-determine-the-pharmacokinetic-profile-safety-and-tolerability-of-sildenafil-revatio-%C3%A2-in-cardiac-surgery-the-revaki-1-study
#18
Arne Ring, Tom Morris, Marcin Wozniak, Nikol Sullo, William Dott, Veerle Verheyden, Tracy Kumar, Nigel Brunskill, Rakesh Vaja, Gavin J Murphy
AIMS: Acute kidney injury (AKI) is a common and severe complication of cardiac surgery. There is no effective prevention or treatment. Sildenafil citrate (Revatio(®) , Pfizer Inc.), a phosphodiesterase type 5 inhibitor, prevents post cardiac surgery AKI in pre-clinical studies, however its use is contraindicated in patients with symptomatic cardiovascular disease. The aim of this study is to assess the safety and pharmacokinetics of intravenous sildenafil in cardiac surgery patients...
October 25, 2016: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/27761893/cardiac-involvement-in-female-carriers-of-duchenne-or-becker-muscular-dystrophy
#19
Thomas McCaffrey, Michela Guglieri, Alexander P Murphy, Katherine Md Bushby, Anna Johnson, John P Bourke
Introduction The significance of abnormal cardiac measures in asymptomatic females who harbor dystrophin gene mutations is controversial. Methods Echo-measures of ventricular function were compared with published norms in a cross-sectional study of 130 (age 39 ± 15.7 years) 'carriers' of Duchenne or Becker muscular dystrophy (DBMD). Correlations between cardiomyopathy (CM) and mutation, CK levels, age, and muscle symptoms were investigated. Results Depending on definition, CM prevalence was 3-33%. Ejection fraction (Simpson) was < 55% in 9 (13%) and < 40% in 2 (2...
October 19, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27750047/bgp-15-improves-aspects-of-the-dystrophic-pathology-in-mdx-and-dko-mice-with-differing-efficacies-in-heart-and-skeletal-muscle
#20
Tahnee L Kennedy, Kristy Swiderski, Kate T Murphy, Stefan M Gehrig, Claire L Curl, Chanchal Chandramouli, Mark A Febbraio, Lea M D Delbridge, René Koopman, Gordon S Lynch
Duchenne muscular dystrophy is a severe and progressive striated muscle wasting disorder that leads to premature death from respiratory and/or cardiac failure. We have previously shown that treatment of young dystrophic mdx and dystrophin/utrophin null (dko) mice with BGP-15, a coinducer of heat shock protein 72, ameliorated the dystrophic pathology. We therefore tested the hypothesis that later-stage BGP-15 treatment would similarly benefit older mdx and dko mice when the dystrophic pathology was already well established...
December 2016: American Journal of Pathology
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