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https://www.readbyqxmd.com/read/27903538/right-ventricular-dysfunction-impairs-effort-tolerance-independent-of-left-ventricular-function-among-patients-undergoing-exercise-stress-myocardial-perfusion-imaging
#1
Jiwon Kim, Antonino Di Franco, Tania Seoane, Aparna Srinivasan, Polydoros N Kampaktsis, Alexi Geevarghese, Samantha R Goldburg, Saadat A Khan, Massimiliano Szulc, Mark B Ratcliffe, Robert A Levine, Ashley E Morgan, Pooja Maddula, Meenakshi Rozenstrauch, Tara Shah, Richard B Devereux, Jonathan W Weinsaft
BACKGROUND: Right ventricular (RV) and left ventricular (LV) function are closely linked due to a variety of factors, including common coronary blood supply. Altered LV perfusion holds the potential to affect the RV, but links between LV ischemia and RV performance, and independent impact of RV dysfunction on effort tolerance, are unknown. METHODS AND RESULTS: The population comprised 2051 patients who underwent exercise stress myocardial perfusion imaging and echo (5...
November 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27900349/symptomatic-bilateral-coronary-artery-fistula-to-pulmonary-artery-in-elderly-patient
#2
Francisco Pereira da Silva, Paulo Donato, Henrique Donato, Elisabete Jorge, Maria Joao Ferreira, Filipe Caseiro-Alves
We report the imaging findings of an uncommon coronary vascular termination anomaly, with fistula to the pulmonary artery. This 70 year old female patient presented unstable angina, showing a coronary artery fistula depicted in coronary angiogram from the left coronary to the pulmonary artery, with no significant atherosclerotic pathology. Due to development of ventricular tachycardia in stress echocardiogram examination, she was proposed for coronary fistula closure. Coronary CT was performed for procedure planning and allowed the identification of a second unsuspected fistula from the right coronary to the right pulmonary artery...
2016: European Journal of Radiology Open
https://www.readbyqxmd.com/read/27891259/neurocardiogenic-syncope-and-supraventricular-tachycardia-in-association-with-a-rare-congenital-aortic-valve-abnormality
#3
Yashwant Agrawal, Jagadeesh K Kalavakunta, Vishal Gupta, William Lapenna
We report a case of a 26-year-old woman who presented with multiple episodes of syncope over a five-months period of time. Transthoracic echocardiogram had shown a normal functioning quadricuspid aortic valve (QAV) which was also confirmed on a transesophageal echocardiogram. Computed tomographic angiography of heart and coronary arteries showed the QAV with equal size of all aortic cusps and normal coronary arteries. Intermittent chest pain and palpitations warranted an exercise stress test. The stress test revealed normal aerobic exertion, with achievement of 101% of maximal peak heart rate...
2016: Case Reports in Cardiology
https://www.readbyqxmd.com/read/27887692/mechanisms-of-effort-intolerance-in-patients-with-heart-failure-and-borderline-ejection-fraction
#4
Yan Topilsky, Zach Rozenbaum, Shafik Khoury, Gregg S Pressman, Yaniv Gura, Jack Sherez, Avi Man, Jason Shimiaie, Sanford Edwards, Joshua Berookhim, Thierry Le Tourneau, Amir Halkin, Simon Biner, Gad Keren, Galit Aviram
Combining echocardiography and cardiopulmonary stress testing allows noninvasive assessment of hemodynamics, and oxygen extraction (A-VO2 difference). We evaluated mechanisms of effort intolerance in patients with heart failure with borderline (40% to 49%) left ventricular ejection fraction (EF) (HF and Borderline Ejection fraction). We included 89 consecutive patients with HF and Borderline Ejection fraction (n = 25; 63.6 ± 14 years, 64% men), control subjects (n = 22), patients with HF with preserved EF (n = 26; EF ≥50%), and patients with HF with reduced EF (n = 16; <40%)...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27875636/evaluation-of-coronary-artery-disease-in-potential-liver-transplant-recipients
#5
REVIEW
Brian J Hogan, Enoka Gonsalkorala, Michael A Heneghan
Improvements in the management of patients undergoing Liver Transplantation (LT) have resulted in a significant increase in survival over recent years. Cardiac disease is now the leading cause of early mortality and the stress of major surgery, haemodynamic shifts, the possibility of haemorrhage or reperfusion syndrome require the recipient to have good baseline cardiac function. The prevalence of coronary artery disease (CAD) is increasing in liver transplant candidates, especially in those with Non-Alcohol related Fatty Liver Disease (NAFLD)...
November 22, 2016: Liver Transplantation
https://www.readbyqxmd.com/read/27858175/an-information-based-machine-learning-approach-to-elasticity-imaging
#6
Cameron Hoerig, Jamshid Ghaboussi, Michael F Insana
An information-based technique is described for applications in mechanical property imaging of soft biological media under quasi-static loads. We adapted the Autoprogressive method that was originally developed for civil engineering applications for this purpose. The Autoprogressive method is a computational technique that combines knowledge of object shape and a sparse distribution of force and displacement measurements with finite-element analyses and artificial neural networks to estimate a complete set of stress and strain vectors...
November 18, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27849240/relationship-between-working-and-voice-conditions-self-reported-by-telemarketers-of-an-emergency-call-center
#7
Claudionaria Torres Dos Santos, Ciro Santos, Leonardo Wanderley Lopes, Priscila Oliveira Costa Silva, Maria Fabiana Bonfim de Lima-Silva
Purpose: To investigate whether there is association between vocal symptoms, voice complaint, and working and voice conditions self-reported by telemarketers. Methods: Study participants were 72 telemarketing operators, both genders, who work in an emergency call center. They responded to a questionnaire on personal data, voice complaints, vocal symptoms, and working conditions. Data analysis was performed using the Chi-square, Mann-Whitney, and Fisher's Exact tests...
September 2016: CoDAS
https://www.readbyqxmd.com/read/27769996/estrogen-receptor-antagonism-exacerbates-cardiac-structural-and-functional-remodeling-in-female-rats
#8
Milad C El Hajj, Van K Ninh, Elia C El Hajj, Jessica M Bradley, Jason D Gardner
We have previously demonstrated the cardioprotective effects of ovarian hormones against adverse ventricular remodeling imposed by chronic volume overload. Here, we assess the estrogen receptor dependence of this cardioprotection. Four groups of female rats were studied: sham-operated (SHAM), volume overloaded (ACF), SHAM treated with estrogen receptor antagonist, ICI 182,780 (SHAM+ICI), and ACF treated with ICI. Cardiac function was assessed temporally using echocardiogram and tissue samples were collected at 5 days and 6 weeks post-surgery...
October 21, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27745977/are-seagrass-beds-indicators-of-anthropogenic-nutrient-stress-in-the-rocky-intertidal
#9
Susanna E Honig, Brenna Mahoney, Jess S Glanz, Brent B Hughes
It is well established that anthropogenic nutrient inputs harm estuarine seagrasses, but the influence of nutrients in rocky intertidal ecosystems is less clear. In this study, we investigated the effect of anthropogenic nutrient loading on Phyllospadix spp., a rocky intertidal seagrass, at local and regional scales. At sites along California, Washington, and Oregon, we demonstrated a significant, negative correlation of urban development and Phyllospadix bed thickness. These results were echoed locally along an urban gradient on the central California coast, where Phyllospadix shoot δ(15)N was negatively associated with Phyllospadix bed thickness, and experimentally, where nutrient additions in mesocosms reduced Phyllospadix shoot formation and increased epiphytic cover on Phyllospadix shoots...
October 13, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27742182/discriminating-circulatory-problems-from-deconditioning-echocardiogram-and-cardio-pulmonary-exercise-test-analysis
#10
Zach Rozenbaum, Shafik Khoury, Galit Aviram, Yaniv Gura, Jack Sherez, Avi Man, Jason Shimiaie, Thierry Le Tourneau, Amir Halkin, Simon Biner, Gad Keren, Yan Topilsky
BACKGROUND: Discriminating circulatory problems with reduced stroke volume from de-conditioning in which the muscles cannot consume O2 normally by gas exchange parameters is difficult. METHODS: We performed combined stress echo and cardio-pulmonary (CPET) tests in 110 patients (20 normal effort capacity, 54 attenuated stroke volume response, 36 de-conditioning) to evaluate multiple hemodynamic parameters and oxygen content difference (A-VO2 Difference) in four predefined activity levels to assess which of the gas measures may help in the discrimination...
October 11, 2016: Chest
https://www.readbyqxmd.com/read/27739276/successful-thrombolysis-of-a-large-pulmonary-artery-thrombosis
#11
Ajay U Mahajan, Deepak S Laddhad, Deepak Bohara, Sangeeta D Laddhad, Yogita T Dinde, Sachin S Bhabad
A 32 yrs old man presented with shortness of breath and syncopal episode with preceding history of DVT 15days above. Patient has tachycardia hypoxia and hypotension, on evaluation ECG Showed S1 Q3 T3 Pattern, bedside Echo Showed visible thrombus of 3cm in pulmonary artery, successfully thrombolysed with tenecteplase and streptokinase. This case study is presented to stress importance of urgent bedside echo in all sudden onset dysponea and hypoxia to rule out pulmonary Embolism which can be successfully thrombolysed without delay...
June 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27738530/aortic-dissection-in-a-healthy-male-athlete-a-unique-case-with-comprehensive-literature-review
#12
Balraj Singh, Jennifer M Treece, Ghulam Murtaza, Samit Bhatheja, Steven J Lavine, Timir K Paul
A young otherwise healthy 27-year-old male who has been using anabolic steroids for a long time developed Type I aortic dissection associated with heavy weightlifting. The patient did not have a recent history of trauma to the chest, no history of hypertension, and no illicit drug use. He presented with severe chest pain radiating to back and syncopal event with exertion. Initial vitals were significant for blood pressure of 80/50 mmHg, pulse of 80 beats per minute, respirations of 24 per minute, and oxygen saturation of 92% on room air...
2016: Case Reports in Cardiology
https://www.readbyqxmd.com/read/27726743/mr-imaging-of-pediatric-bone-marrow
#13
Brian Y Chan, Kara G Gill, Susan L Rebsamen, Jie C Nguyen
The bone marrow is one of the largest organs in the body and is visible in every magnetic resonance (MR) imaging study. It is composed of a combination of hematopoietic red marrow and fatty yellow marrow, and its composition changes throughout life in response to normal maturation (red to yellow conversion) and stress (yellow to red reconversion). MR imaging is highly sensitive for detection of altered marrow signal intensity, and the T1-weighted spin-echo sequence provides the most robust contrast between yellow marrow and disease...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27716708/transesophageal-echo-diagnosis-of-perioperative-unusual-transient-left-ventricular-apical-ballooning-syndrome
#14
Hugo Andr S Mantilla, Felix Ramón Montes, William F Amaya
Stress cardiomyopathy, or Takotsubo syndrome, is a widely recognized cardiac pathology with a clinical presentation similar to acute coronary syndrome and related to physical or emotional stress. Perioperatively, it is challenging to identify it given the variety of forms and scenarios in which it can present. We describe a 22-year-old patient with an atypical presentation of Takotsubo syndrome during anesthesia induction, which highlights the usefulness of transesophageal echocardiography for the initial diagnosis...
October 2016: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/27696615/elastic-properties-of-lithium-disilicate-versus-feldspathic-inlays-effect-on-the-bonding-by-3d-finite-element-analysis
#15
Flávia Zardo Trindade, Luiz Felipe Valandro, Niek de Jager, Marco Antônio Bottino, Cornelis Johannes Kleverlaan
PURPOSE: To determine the elastic properties of five ceramic systems with different compositions (lithium disilicate vs. feldspathic ceramics) and processing methods and compare the stress distribution in premolars in the interface with inlays made with these systems loaded with the maximum normal bite force (665 N) using 3D finite element analysis (FEA). MATERIALS AND METHODS: The elastic properties of five ceramic restoration materials (IPS e.max Press, IPS e...
October 3, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27687024/complementary-role-of-cardiovascular-imaging-and-laboratory-indices-in-early-detection-of-cardiovascular-disease-in-systemic-lupus-erythematosus
#16
S Mavrogeni, L Koutsogeorgopoulou, T Dimitroulas, G Markousis-Mavrogenis, G Kolovou
BACKGROUND: Cardiovascular disease (CVD) has been documented in >50% of systemic lupus erythematosus (SLE) patients, due to a complex interplay between traditional risk factors and SLE-related factors. Various processes, such as coronary artery disease, myocarditis, dilated cardiomyopathy, vasculitis, valvular heart disease, pulmonary hypertension and heart failure, account for CVD complications in SLE. METHODS: Electrocardiogram (ECG), echocardiography (echo), nuclear techniques, cardiac computed tomography (CT), cardiovascular magnetic resonance (CMR) and cardiac catheterization (CCa) can detect CVD in SLE at an early stage...
September 29, 2016: Lupus
https://www.readbyqxmd.com/read/27660577/false-positive-stress-echocardiograms-a-continuing-challenge
#17
REVIEW
Salima Qamruddin
BACKGROUND: Stress echocardiography is an integral test in the cardiac diagnostic laboratory and has high sensitivity and specificity. Despite the excellent specificity of stress echocardiography, we continue to see a subset of patients with false-positive tests (defined as <50% diameter stenosis on subsequent coronary angiography). These false-positive findings present a management challenge because it remains unclear if and how to treat these patients. METHODS: This article reviews relevant clinical studies and their outcomes...
2016: Ochsner Journal
https://www.readbyqxmd.com/read/27648995/presence-and-site-matching-of-ischemia-at-stress-scintigraphy-or-contrast-stress-echo-in-individuals-developing-myocardial-infarction-within-3-months-does-stenosis-severity-matter
#18
Carmine Siniscalchi, Claudio Reverberi, Nicola Gaibazzi
BACKGROUND AND AIM: Individuals with ischemia during cardiac stress-test (cST) have a high risk of developing myocardial infarction (MI), but the pathophysiologic mechanism has never been clarified. It is thought that non flow-limiting coronary plaques (FLP) cause more often MI than FLP, but this is in contradiction with the predictive value of cST. We investigated the correspondence between reversible ischemia and location of subsequent MI, since functional assessment shortly before MI could clarify whether the culprit plaque is a FLP or not...
September 13, 2016: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/27610249/severe-bioprosthetic-mitral-valve-stenosis-and-heart-failure-in-a-young-woman-with-systemic-lupus-erythematosus
#19
Siddharth Wartak, Isaac Akkad, Adnan Sadiq, Gregory Crooke, Manfred Moskovits, Robert Frankel, Gerald Hollander, Jacob Shani
A 23-year-old African American woman with a past medical history of systemic lupus erythematous (SLE), secondary hypertension, and end stage renal disease (ESRD) on hemodialysis for eight years was stable until she developed symptomatic severe mitral regurgitation with preserved ejection fraction. She underwent a bioprosthetic mitral valve replacement (MVR) at outside hospital. However, within a year of her surgery, she presented to our hospital with NYHA class IV symptoms. She was treated for heart failure but in view of her persistent symptoms and low EF was considered for heart and kidney transplant...
2016: Case Reports in Cardiology
https://www.readbyqxmd.com/read/27604193/effect-of-intralesional-platelet-rich-plasma-prp-treatment-on-clinical-and-ultrasonographic-parameters-in-equine-naturally-occurring-superficial-digital-flexor-tendinopathies-a-randomized-prospective-controlled-clinical-trial
#20
Florian Geburek, Moritz Gaus, Hans T M van Schie, Karl Rohn, Peter M Stadler
BACKGROUND: Regenerative and anti-inflammatory effects on tendinopathies have been attributed to blood-derived biologicals. To date the evidence for the efficacy of autologous platelet-rich plasma (PRP) treatment of naturally occurring equine tendinopathies is limited. The purpose of this placebo-controlled clinical trial was to describe the effect of a single treatment of equine superficial digital flexor tendon (SDFT) disease with PRP on clinical and ultrasonographic parameters. Twenty horses with naturally occurring tendinopathies of forelimb SDFTs were randomly assigned to the PRP-treated group (n = 10) or control group (n = 10) after clinical and ultrasonographic examination...
2016: BMC Veterinary Research
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