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Maria Clara Alencar, Flavio F Arbex, Aline Souza, Adriana Mazzuco, Priscila A Sperandio, Alcides Rocha, Daniel M Hirai, Frederico Mancuso, Danilo C Berton, Audrey Borghi-Silva, Dirceu Almeida, Denis E OʼDonnel, J Alberto Neder
PURPOSE: To investigate whether the opposite effects of heart failure (HF) and chronic obstructive pulmonary disease (COPD) on exercise ventilatory inefficiency (minute ventilation [(Equation is included in full-text article.)E]-carbon dioxide output [(Equation is included in full-text article.)CO2] relationship) would negatively impact its prognostic relevance. METHODS: After treatment optimization and an incremental cardiopulmonary exercise test, 30 male patients with HF-COPD (forced expiratory volume in 1 second [FEV1] = 57% ± 17% predicted, ejection fraction = 35% ± 6%) were prospectively followed up during 412 ± 261 days for major cardiac events...
November 2016: Journal of Cardiopulmonary Rehabilitation and Prevention
N Szentandrassy, B Horvath, K Vaczi, K Kistamas, L Masuda, J Magyar, T Banyasz, Z Papp, P P Nanasi
Omecamtiv mecarbil (OM) is a myosin activator agent recently developed for treatment of heart failure. Although its action on extending systolic ejection time and increasing left ventricular ejection fraction is well documented, no data is available regarding its possible side-effects on cardiac ion channels. Therefore, the present study was designed to investigate the effects of OM on action potential morphology and the underlying ion currents in isolated canine ventricular myocytes using sharp microelectrodes, conventional patch clamp, and action potential voltage clamp techniques...
August 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
Jaroslav Meluzin, Zdenek Starek, Tomas Kulik, Jiri Jez, Frantisek Lehar, Josef Tomandl, Ladislav Dusek, Jiri Wolf, Pavel Leinveber, Miroslav Novak
BACKGROUND: Noninvasive diagnosis of exercise-induced elevation of left ventricular filling pressure is difficult and remains unsatisfactory. The aim of this study was to assess the accuracy of the ratio of early diastolic transmitral (E) to mitral annular (e') velocity and to determine new parameters or parameter combinations with the ability to predict exercise-induced left atrial pressure (LAP) elevation. METHODS AND RESULTS: Eighty patients with paroxysmal atrial fibrillation (AF) referred for catheter AF ablation underwent simultaneous exercise echocardiography and direct invasive LAP measurements, as well as a resting and postexercise biomarker analysis...
October 25, 2016: Echocardiography
Yong-Cun Zhu, Yan Xue, Hui-Ling Diao, Hua Chen, Hong-Yun Liu, Xiao-Hua Han, Lei Chen
The globus pallidus occupies a critical position in the indirect pathway of the basal ganglia circuit, which regulates movement under both normal and pathological conditions. Previous studies have shown that the globus pallidus receives dopaminergic innervation from the axonal collaterals of nigrostriatal fibers. Both dopamine D1 and D2 like receptors are expressed in the globus pallidus. The present study was aimed to investigate the direct in vivo electrophysiological effects of dopamine D2 like receptors in the globus pallidus of both normal and parkinsonian rats...
October 25, 2016: Sheng Li Xue Bao: [Acta Physiologica Sinica]
Bridgette A Kanz, Megan H Pollack, Romany Johnpulle, Igor Puzanov, Leora Horn, Alicia Morgans, Jeffrey A Sosman, Suthee Rapisuwon, R Martin Conry, Zeynep Eroglu, Douglas B Johnson
BACKGROUND: Anti-PD-1 therapy is increasingly used in various advanced malignancies. Patients with baseline organ dysfunction are largely excluded from clinical trials. Therefore it is unclear whether anti-PD-1 therapy is safe or effective in this setting. Further, these patients are often not candidates for other anti-cancer therapies, highlighting their need for active treatment options. METHODS: We performed a retrospective analysis of patients from multiple centers with advanced solid tumors and baseline organ dysfunction who received anti-PD-1 therapy...
2016: Journal for Immunotherapy of Cancer
Romain Capoulade, Xin Zeng, Jessica R Overbey, Gorav Ailawadi, John H Alexander, Deborah Ascheim, Michael Bowdish, Annetine C Gelijns, Paul Grayburn, Irving L Kron, Robert A Levine, Michael J Mack, Serguei Melnitchouk, Robert E Michler, John C Mullen, Patrick O'Gara, Michael K Parides, Peter Smith, Pierre Voisine, Judy Hung
BACKGROUND: In ischemic mitral regurgitation (IMR), ring annuloplasty is associated with a significant rate of recurrent MR. Ring size is based on intertrigonal distance without consideration of left ventricular (LV) size. However, LV size is an important determinant of mitral valve (MV) leaflet tethering before and after repair. We aimed to determine whether LV-MV ring mismatch (mismatch of LV size relative to ring size) is associated with recurrent MR in patients with IMR after restrictive ring annuloplasty...
October 25, 2016: Circulation
Piroze M Davierwala, Sergey Leontyev, Alexander Verevkin, Ardawan J Rastan, Matthias Mohr, Farhad Bakhtiary, Martin Misfeld, Friedrich W Mohr
BACKGROUND: Cardiogenic shock after acute myocardial infarction is an indication for emergent coronary artery bypass grafting in patients not amenable to percutaneous coronary intervention. Our study aimed to evaluate and identify risk factors for early and long-term outcomes in such patients. METHODS: A total of 508 patients who underwent coronary artery bypass grafting for cardiogenic shock complicating acute myocardial infarction between January 2000 and June 2014 were divided into 3 time cohorts: 2000 to 2004 (n=204), 2005 to 2009 (n=166), and 2010 to 2014 (n=138)...
October 25, 2016: Circulation
Da-Qing Jiang, Tian-Xiang Gu, Zhao-Fa Xu, Shuang Liu, Xue-Yuan Li
OBJECTIVE: To investigate whether heart tissue-derived extracellular matrix (ECM) promotes the differentiation of cardiosphere-derived cells (CDCs) implanted in rat infracted myocardium to improve the cardiac structure and function. METHODS: Rat CDCs were cultured by cardiac explant methods, and ECM was prepared by decelluariztion method. In a Wistar rat model of acute myocardial infarction established by ligating the left anterior descending branch, IMDM solution, ECM suspension, 10(6) CDCs in IMDM solution, or 10(6) CDCs in ECM suspension were injected into the infracted rat myocardium (6 rats in each group)...
October 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
David Dobarro, Marian Urban, Karen Booth, Neil Wrightson, Javier Castrodeza, Jerome Jungschleger, Nicola Robinson-Smith, Andrew Woods, Gareth Parry, Stephan Schueler, Guy A MacGowan
BACKGROUND: This study examined whether aortic valve opening (AVO) and other echocardiographic parameters influence outcomes in patients on left ventricular (LV) assist device (LVAD) support. Pump thrombosis (PT) and ischemic stroke (IS) are known complications of LVAD, but mechanisms that could influence them are not completely understood. METHODS: This was a retrospective analysis of 147 patients who received a HeartWare Ventricular Assist Device ( HeartWare International) as a bridge to transplant or to candidacy between July 2009 and August 2015, of whom 126 had at least 30 days of follow-up before the first event (30-days-out cohort)...
August 18, 2016: Journal of Heart and Lung Transplantation
Vaida Petrauskiene, Ruta Vaiciuniene, Inga Arune Bumblyte, Vytautas Kuzminskis, Edita Ziginskiene, Saulius Grazulis, Egle Jonaitiene
BACKGROUND: Vascular calcification (VC) is one of the factors associated with cardiovascular mortality in hemodialysis (HD) patients. Recommendations concerning screening for VC differ. Possible ability to prevent and reversibility of VC are major subjects on debate whether screening for VC could improve outcomes of renal patients. The objective of the study was to evaluate the significance of simple vascular calcification score (SVCS) based on plane radiographic films and to test its association with non-fatal cardiovascular events in patients on chronic HD...
October 21, 2016: Néphrologie & Thérapeutique
Jan L Bruse, Abbas Khushnood, Kristin McLeod, Giovanni Biglino, Maxime Sermesant, Xavier Pennec, Andrew M Taylor, Tain-Yen Hsia, Silvia Schievano
OBJECTIVES: Even after successful aortic coarctation repair, there remains a significant incidence of late systemic hypertension and other morbidities. Independently of residual obstruction, aortic arch morphology alone may affect cardiac function and outcome. We sought to uncover the relationship of arch 3-dimensional shape features with functional data obtained from cardiac magnetic resonance scans. METHODS: Three-dimensional aortic arch shape models of 53 patients (mean age, 22...
September 22, 2016: Journal of Thoracic and Cardiovascular Surgery
Nicola Riccardo Pugliese, Iacopo Fabiani, Salvatore La Carrubba, Lorenzo Conte, Francesco Antonini-Canterin, Paolo Colonna, Pio Caso, Frank Benedetto, Veronica Santini, Scipione Carerj, Maria Francesca Romano, Rodolfo Citro, Vitantonio Di Bello
Patients with asymptomatic heart failure (HF; stage A and B) are characterized by maladaptive left ventricular (LV) remodeling. Classic 4-group classification of remodeling considers only LV mass index and relative wall thickness as variables. Complex remodeling classification (CRC) includes also LV end-diastolic volume index. Main aim was to assess the prognostic impact of CRC in stage A and B HF. A total of 1,750 asymptomatic subjects underwent echocardiographic examination as a screening evaluation in the presence of cardiovascular risk factors...
September 29, 2016: American Journal of Cardiology
William D Erwin, Aaron C Jessop, Martha V Mar, Homer A Macapinlac, Osama R Mawlawi
OBJECTIVE: The aim of this study was to assess the feasibility of IQ-SPECT gated blood pool (MUGA) under conditions of decreased scan time (ST). PATIENTS AND METHODS: Ten patients underwent routine 26-min, two-view planar, followed by LEHR and IQ-SPECT MUGA, on a Siemens dual-head Symbia scanner. Six 'back and forth' 4-min SPECT scans were summed into 4-, 8-, 12-, 16-, 20-, and 24-min equivalent scans, and reconstructed iteratively (IQ-SPECT and LEHR) and with FBP (LEHR)...
October 21, 2016: Nuclear Medicine Communications
Cüneyt Toprak, Gökhan Kahveci, Alev Kılıçgedik, Cevat Kırma, Selçuk Pala, Mustafa Bulut, Cihangir Kaymaz, Nihal Özdemir, İbrahim Akın İzgi, Mehmet İnanır, Anıl Avcı, Ali Metin Esen
OBJECTIVE: Mitral valve regurgitation (MR) is the second most common heart valve disease in Europe. Without intervention, prognosis of severe symptomatic MR is poor. Percutaneous edge-to-edge mitral valve repair with MitraClip is a promising mitral regurgitation treatment technique in select, high-surgical-risk patients. The present objective was to describe the experience of a single center with MitraClip use in a high-risk series in Turkey. METHODS: Between May 2013 and September 2014, 28 high-surgical-risk patients with MR of at least grade 3+ and mean EuroSCORE of 26% underwent MitraClip implantation at our institution...
October 2016: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
Tai-Sung Lee, Brian K Radak, Michael E Harris, Darrin M York
RNA enzymes serve as a potentially powerful platform from which to design catalysts and engineer new biotechnology. A fundamental understanding of these systems provides insight to guide design. The hepatitis delta virus ribozyme (HDVr) is a small, self-cleaving RNA motif widely distributed in nature, that has served as a paradigm for understanding basic principles of RNA catalysis. Nevertheless, questions remain regarding the precise roles of divalent metal ions and key nucleotides in catalysis. In an effort to establish a reaction mechanism model consistent with available experimental data, we utilize molecular dynamics simulations to explore different conformations and metal ion binding modes along the HDVr reaction path...
2016: ACS Catalysis
Frank Spillmann, Uwe Kühl, Sophie Van Linthout, Fernando Dominguez, Felicitas Escher, Heinz-Peter Schultheiss, Burkert Pieske, Carsten Tschöpe
We report the case of a 17-year-old female patient with known hypertrophic cardiomyopathy and a Wolff-Parkinson-White syndrome. She came to our department for further evaluation of a new diagnosed dilated cardiomyopathy characterized by an enlargement of the left ventricle and a fall in ejection fraction. Clinically, she complained about atypical chest pain, arrhythmic episodes with presyncopal events, and dyspnea (NYHA III) during the last 6 months. Non-invasive and invasive examinations including magnetic resonance imaging, electrophysiological examinations, and angiography did not lead to a conclusive diagnosis...
June 2016: ESC Heart Failure
Tee Joo Yeo, Poh Shuan Daniel Yeo, Farid Abdul Hadi, Timothy Cushway, Kim Yee Lee, Bee Choo Tai, Carolyn S P Lam
AIMS: Iron deficiency (ID) is highly prevalent in patients with heart failure (HF) worldwide regardless of haemoglobin levels. Results from therapeutic trials of intermittently dosed intravenous (i.v.) iron are promising in the ambulatory Caucasian population with HF with reduced left ventricular ejection fraction, although evidence is scarce in Asia. The Pilot Randomized Controlled Trial to Assess the Role of Intravenous Ferric Carboxymaltose in Asian Patients with Heart Failure aims to assess the effect of single-dose i...
June 2016: ESC Heart Failure
Eiichiro Yamamoto, Yoshihiro Hirata, Takanori Tokitsu, Hiroaki Kusaka, Noriaki Tabata, Kenichi Tsujita, Megumi Yamamuro, Koichi Kaikita, Hiroshi Watanabe, Seiji Hokimoto, Toru Maruyama, Hisao Ogawa
AIMS: Although inflammation plays an important role in the pathogenesis of heart failure (HF), the precise pathophysiological role of inflammation in HF with preserved left ventricular ejection fraction (HFpEF) still remains unclear. Hence, we examined the clinical significance of plasma neopterin, an inflammatory biomarker, in HFpEF patients. METHODS AND RESULTS: In the present study, we recruited consecutive HFpEF patients hospitalized in Kumamoto University Hospital, and further measured plasma neopterin by high-performance liquid chromatography and serum derivatives of reactive oxidative metabolites (DROM), a new biomarker of reactive oxygen species...
March 2016: ESC Heart Failure
Line Lisbeth Olesen, Andreas Andersen
AIMS: Due to the demographic development there is an increasing number of senior citizens with left ventricular systolic dysfunction (LVSD), defined as ejection fraction (EF) < 40%. Unfortunately there are under-diagnosis and under-treatment in the elderly of this serious condition. Echocardiography is the gold standard to diagnose LVSD, but access is limited. Simple screening methods may ensure reduction of undetected cases, and this study investigates if electrocardiogram (ECG) can be used to screen for LVSD in the geriatric population...
March 2016: ESC Heart Failure
Heli Tolppanen, Krista Siirila-Waris, Veli-Pekka Harjola, David Marono, Jiri Parenica, Philipp Kreutzinger, Tuomo Nieminen, Marie Pavlusova, Tuukka Tarvasmaki, Raphael Twerenbold, Jukka Tolonen, Roman Miklik, Markku S Nieminen, Jindrich Spinar, Christian Mueller, Johan Lassus
AIMS: Data on the prognostic role of left and right bundle branch blocks (LBBB and RBBB), and nonspecific intraventricular conduction delay (IVCD; QRS ≥ 110 ms, no BBB) in acute heart failure (AHF) are controversial. Our aim was to investigate electrocardiographic predictors of long-term survival in patients with de novo AHF and acutely decompensated chronic heart failure (ADCHF). METHODS AND RESULTS: We analysed the admission electrocardiogram of 982 patients from a multicenter European cohort of AHF with 3...
March 2016: ESC Heart Failure
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