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https://www.readbyqxmd.com/read/28938247/challenges-with-percent-predicted-maximum-vo2-in-patients-with-heart-failure
#1
Clinton A Brawner, Jonathan K Ehrman, Ali Shafiq, Matthew A Saval, Stuart D Russell, David E Lanfear, Steven J Keteyian
PURPOSE: To describe the influence of different equations to predict maximum oxygen uptake (MVO2) on the percent predicted MVO2 (ppMVO2) and the resultant categorization of patients with heart failure with reduced ejection fraction (HFrEF) into high or low risk. METHODS: In this retrospective cohort study, ppMVO2 was calculated using six different equations to predict MVO2 among 1,168 patients with HFrEF (33% women). Repeated measures analysis of variance was used to compare within-subject differences in mean ppMVO2 between the prediction equations...
September 21, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28936576/improvement-of-continuous-subcutaneous-insulin-infusion-on-patients-with-type-2-diabetes-mellitus-by-3-dimensional-speckle-tracking-echocardiography
#2
Hong-Xia Luo, Xiao-Ling Zhou, Hong-Ju Kou, Xian-Wei Ni, Qing Wu, Chun-Peng Zou, Dao-Zhu Wu, Yong-Fang Liu
Three-dimensional speckle tracking echocardiography (3D-STE) was used to evaluate the improvement of continuous subcutaneous insulin infusion on the left ventricular (LV) systolic function of patients with type 2 diabetes mellitu (T2DM). We recruited T2DM patients (38 cases, diabetic group) and healthy volunteers (35 cases, control group) to collect LV full volume imaging. TomTec software was used for calculating LV global longitudinal strain (LVGLS), global circumferential strain (LVGCS), peak twist (LVTW), peak apical rotation (LVPAR), ejection fraction (LVEF), and torsion (LVT)...
September 21, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28936433/trpc3-channels-in-cardiac-fibrosis
#3
REVIEW
Takuro Numaga-Tomita, Sayaka Oda, Tsukasa Shimauchi, Akiyuki Nishimura, Supachoke Mangmool, Motohiro Nishida
Cardiac stiffness, caused by interstitial fibrosis due to deposition of extracellular matrix proteins, is thought as a major clinical outcome of heart failure with preserved ejection fraction (HFpEF). Canonical transient receptor potential (TRPC) subfamily proteins are components of Ca(2+)-permeable non-selective cation channels activated by receptor stimulation and mechanical stress, and have been attracted attention as a key mediator of maladaptive cardiac remodeling. How TRPC-mediated local Ca(2+) influx encodes a specific signal to induce maladaptive cardiac remodeling has been long obscure, but our recent studies suggest a pathophysiological significance of channel activity-independent function of TRPC proteins for amplifying redox signaling in heart...
2017: Frontiers in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28935571/aggravated-post-infarct-heart-failure-in-type-2-diabetes-is-associated-with-impaired-mitophagy-and-exaggerated-inflammasome-activation
#4
Thota Durga Devi, Mohan Babu, Petri Mäkinen, Minna Kaikkonen, Merja Heinaniemi, Hanne Laakso, Elias Ylä-Herttuala, Lassi Rieppo, Timo Liimatainen, Nikolay Naumenko, Pasi Tavi, Seppo Ylä-Herttuala
Type 2 diabetes mellitus (T2DM) is a major risk factor for heart disease. Mortality rates following myocardial infarction (MI) are significantly increased in T2DM patients due to dysfunctional left ventricle (LV). However, molecular pathways underlying accelerated post-MI heart failure (HF) in T2DM remain unclear. We investigated the underlying mechanisms by inducing MI in a well-established model of T2DM and control mice. Cardiac imaging revealed a significantly decreased global LV ejection fraction (EF) in parallel with increased mortality post-MI in T2DM mice compared to controls...
September 18, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28935040/cardiopulmonary-exercise-testing-what-is-its-value
#5
REVIEW
Marco Guazzi, Francesco Bandera, Cemal Ozemek, David Systrom, Ross Arena
Compared with traditional exercise tests, cardiopulmonary exercise testing (CPET) provides a thorough assessment of exercise integrative physiology involving the pulmonary, cardiovascular, muscular, and cellular oxidative systems. Due to the prognostic ability of key variables, CPET applications in cardiology have grown impressively to include all forms of exercise intolerance, with a predominant focus on heart failure with reduced or with preserved ejection fraction. As impaired cardiac output and peripheral oxygen diffusion are the main determinants of the abnormal functional response in cardiac patients, invasive CPET has gained new popularity, especially for diagnosing early heart failure with preserved ejection fraction and exercise-induced pulmonary hypertension...
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28935038/bone-marrow-derived-tenascin-c-attenuates-cardiac-hypertrophy-by-controlling-inflammation
#6
Lei Song, Lai Wang, Fuqiang Li, Ada Yukht, Minghui Qin, Haley Ruther, Mingjie Yang, Aurelio Chaux, Prediman K Shah, Behrooz G Sharifi
BACKGROUND: Tenascin-C (TNC) is a highly conserved matricellular protein with a distinct expression pattern during development and disease. Remodeling of the left ventricle (LV) in response to pressure overload leads to the re-expression of the fetal gene program. OBJECTIVES: The aim of this study was to investigate the function of TNC in cardiac hypertrophy in response to pressure overload. METHODS: Pressure overload was induced in TNC knockout and wild-type mice by constricting their abdominal aorta or by infusion of angiotensin II...
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28934837/bromocriptine-for-the-treatment-of-peripartum-cardiomyopathy-a-multicentre-randomized-study
#7
Denise Hilfiker-Kleiner, Arash Haghikia, Dominik Berliner, Jens Vogel-Claussen, Johannes Schwab, Annegret Franke, Marziel Schwarzkopf, Philipp Ehlermann, Roman Pfister, Guido Michels, Ralf Westenfeld, Verena Stangl, Ingrid Kindermann, Uwe Kühl, Christiane E Angermann, Axel Schlitt, Dieter Fischer, Edith Podewski, Michael Böhm, Karen Sliwa, Johann Bauersachs
Aims: An anti-angiogenic cleaved prolactin fragment is considered causal for peripartum cardiomyopathy (PPCM). Experimental and first clinical observations suggested beneficial effects of the prolactin release inhibitor bromocriptine in PPCM. Methods and results: In this multicentre trial, 63 PPCM patients with left ventricular ejection fraction (LVEF) ≤35% were randomly assigned to short-term (1W: bromocriptine, 2.5 mg, 7 days) or long-term bromocriptine treatment (8W: 5 mg for 2 weeks followed by 2...
September 14, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28934278/intercalated-disc-in-failing-hearts-from-patients-with-dilated-cardiomyopathy-its-role-in-the-depressed-left-ventricular-function
#8
Ana Ortega, Estefanía Tarazón, Carolina Gil-Cayuela, María García-Manzanares, Luis Martínez-Dolz, Francisca Lago, José Ramón González-Juanatey, Juan Cinca, Esther Jorge, Manuel Portolés, Esther Roselló-Lletí, Miguel Rivera
Alterations in myocardial structure and reduced cardiomyocyte adhesions have been previously described in dilated cardiomyopathy (DCM). We studied the transcriptome of cell adhesion molecules in these patients and their relationships with left ventricular (LV) function decay. We also visualized the intercalated disc (ID) structure and organization. The transcriptomic profile of 23 explanted LV samples was analyzed using RNA-sequencing (13 DCM, 10 control [CNT]), focusing on cell adhesion genes. Electron microscopy analysis to visualize ID structural differences and immunohistochemistry experiments of ID proteins was also performed...
2017: PloS One
https://www.readbyqxmd.com/read/28934276/enhanced-pyruvate-dehydrogenase-activity-improves-cardiac-outcomes-in-a-murine-model-of-cardiac-arrest
#9
Lin Piao, Yong-Hu Fang, Manfred M Kubler, Michael W Donnino, Willard W Sharp
RATIONALE: Post-ischemic changes in cellular metabolism alter myocardial and neurological function. Pyruvate dehydrogenase (PDH), the limiting step in mitochondrial glucose oxidation, is inhibited by increased expression of PDH kinase (PDK) during ischemia/reperfusion injury. This results in decreased utilization of glucose to generate cellular ATP. Post-cardiac arrest (CA) hypothermia improves outcomes and alters metabolism, but its influence on PDH and PDK activity following CA are unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28933414/association-between-low-serum-bicarbonate-concentrations-and-cardiovascular-disease-in-patients-in-the-end-stage-of-renal-disease
#10
Vaia D Raikou, Despina Kyriaki
BACKGROUND: Metabolic acidosis, a common condition particularly in the end-stage of renal disease patients, results in malnutrition, inflammation and oxidative stress. In this study, we focused on the association between low serum bicarbonate and cardiovascular disease in patients on intermittent dialysis. METHODS: We studied 52 on-line-pre-dilution hemodiafiltration (on-l HDF) patients, 32 males and 20 females, with a mean age of 58.01 ± 15.4 years old. Metabolic acidosis was determined by serum bicarbonate concentrations less than 22 mmol/L...
November 15, 2016: Diseases (Basel)
https://www.readbyqxmd.com/read/28933308/polymorphism-gln27glu-of-%C3%AE-2-adrenergic-receptors-in-patients-with-ischaemic-cardiomyopathy
#11
Sofia Metaxa, Constantinos Missouris, Depy Mavrogianni, Antigoni Miliou, Evangelos Oikonomou, Antonios Vlismas, Eirini Toli, Lambrini Kormali, Peter Drakakis, Dimitris Tousoulis
BACKGROUND: Polymorphisms of the adrenergic receptors (ARs) might affect the development and progression of heart failure (HF) and the response to treatment with β-blockade therapy. OBJECTIVE: To examine the role of the Gln27Glu polymorphism of β2-AR in HF development and to assess the hypothesis that Gln27Glu is associated with coronary artery disease in patients with ischaemic HF. METHODS: In this case control study we enrolled 155 consecutive patients with symptomatic HF of ischaemic aetiology with impaired left ventricular ejection fraction (LVEF) ≤35%...
September 19, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28932553/the-relationship-between-apnoea-hypopnoea-index-and-gensini-score-in-patients-with-acute-myocardial-infarction-undergoing-emergency-primary-percutaneous-coronary-intervention
#12
Cai-Ping Zhu, Tao-Ping Li, Xiao Wang, Yu-Hua Zhao, Shi-Xi Zhou, Yan Fu, Yi-Wei Jiang, Xue-Ping Xiao
BACKGROUND: Sleep apnoea hypopnoea syndrome (SAHS) is characterised by repetitive nocturnal hypoxemia and has a high prevalence among patients with acute myocardial infarction (AMI). But there are few studies on patients with AMI undergoing emergency primary percutaneous coronary intervention (pPCI). In this study, we want to find the prevalence of SAHS among patients with AMI undergoing emergency pPCI and determine whether SAHS would worsen the condition among these people, and especially affect the damage degree of the coronary artery...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932357/effects-of-hypertonic-saline-solution-on-body-weight-and-serum-creatinine-in-patients-with-acute-decompensated-heart-failure
#13
Gabrielle Lafrenière, Patrick Béliveau, Jean-Yves Bégin, David Simonyan, Sylvain Côté, Valérie Gaudreault, Zeev Israeli, Shahar Lavi, Rodrigo Bagur
AIM: To test the safety and effectiveness of hypertonic saline solution (HSS + F) as a strategy for weight loss and prevention of further deterioration of renal function. METHODS: Patients admitted with acute decompensated heart failure (ADHF) who received HSS + F were included in the study. After a period of a standard ADHF treatment, our patients received an intravenous infusion of furosemide (250 mg) combined with HSS (150 mL of 3% NaCl) twice a day for a mean duration of 2...
August 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28931942/self-propulsion-of-leidenfrost-drops-between-non-parallel-structures
#14
Cheng Luo, Manjarik Mrinal, Xiang Wang
In this work, we explored self-propulsion of a Leidenfrost drop between non-parallel structures. A theoretical model was first developed to determine conditions for liquid drops to start moving away from the corner of two non-parallel plates. These conditions were then simplified for the case of a Leidenfrost drop. Furthermore, ejection speeds and travel distances of Leidenfrost drops were derived using a scaling law. Subsequently, the theoretical models were validated by experiments. Finally, three new devices have been developed to manipulate Leidenfrost drops in different ways...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931920/evaluation-of-circulating-levels-of-ccn2-connective-tissue-growth-factor-in-patients-with-st-elevation-myocardial-infarction
#15
Vibeke Ritschel, Christian Shetelig, Ingebjørg Seljeflot, Shanmuganathan Limalanathan, Pavel Hoffmann, Sigrun Halvorsen, Harald Arnesen, Jan Eritsland, Geir Øystein Andersen
CCN2/Connective tissue growth factor seems to be involved in development of cardiac hypertrophy and fibrosis, but a possible cardioprotective role in left ventricular (LV) remodelling following myocardial infarction has also been suggested. The main objectives of the study were therefore to investigate whether circulating CCN2 levels were associated with infarct size, LV function, adverse remodelling or clinical outcome in two cohorts of patients with ST-elevation myocardial infarction (STEMI). CCN2 was measured in 988 patients 18 hours after PCI and clinical events were recorded after 55 months in the BAMI cohort...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931700/peritoneal-dialysis-for-the-treatment-of-cardiorenal-syndrome-type-1-a-prospective-brazilian-study
#16
Daniela Ponce, Cassiana Góes, Mariele Oliveira, Andre Balbi
This study aimed to explore the role of high-volume peritoneal dialysis (HVPD) in cardiorenal syndrome (CRS) type 1 patients in relation to metabolic and fluid control and outcome. Sixty-four patients were treated by HVPD (prescribed Kt/V = 0.50/session), flexible catheter and cycler. Mean age was 68.8 ± 15.4 years, 54.7% needed intravenous inotropic agents and/or intravenous vasodilators, 31.2% were on mechanical ventilation, acute coronary syndrome (ACS) was the main cause of acute disease heart failure (ADHF) 48...
September 2017: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/28931652/responsive-monitoring-of-mitochondrial-redox-states-in-heart-muscle-predicts-impending-cardiac-arrest
#17
Dorothy A Perry, Joshua W Salvin, Padraic Romfh, Peili Chen, Kalyani Krishnamurthy, Lindsay M Thomson, Brian D Polizzotti, Francis X McGowan, Daryoosh Vakhshoori, John N Kheir
Assessing the adequacy of oxygen delivery to tissues is vital, particularly in the fields of intensive care medicine and surgery. As oxygen delivery to a cell becomes deficient, changes in mitochondrial redox state precede changes in cellular function. We describe a technique for the continuous monitoring of the mitochondrial redox state on the epicardial surface using resonance Raman spectroscopy. We quantify the reduced fraction of specific electron transport chain cytochromes, a metric we name the resonance Raman reduced mitochondrial ratio (3RMR)...
September 20, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28931529/electrocardiographic-strain-pattern-is-associated-with-left-ventricular-concentric-remodeling-scar-and-mortality-over-10%C3%A2-years-the-multi-ethnic-study-of-atherosclerosis
#18
Yuko Y Inoue, Elsayed Z Soliman, Kihei Yoneyama, Bharath Ambale-Venkatesh, Colin O Wu, Rodney Sparapani, David A Bluemke, João A C Lima, Hiroshi Ashikaga
BACKGROUND: Both ECG strain pattern and QRS measured left ventricular (LV) hypertrophy criteria are associated with LV hypertrophy and have been used for risk stratification. However, the independent predictive value of ECG strain in apparently healthy individuals in predicting mortality and adverse cardiovascular events is unclear. METHODS AND RESULTS: MESA (Multi-Ethnic Study of Atherosclerosis) is a multicenter, prospective cohort of 6441 participants (mean age, 62 years; 54% women)...
September 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28931528/suppression-of-tumorigenicity-2-in-heart-failure-with-preserved-ejection-fraction
#19
(no author information available yet)
No abstract text is available yet for this article.
September 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28930049/experience-with-the-syncardia-total-artificial-heart-in-a-canadian-centre
#20
Anthony Nguyen, Michel Pellerin, Louis P Perrault, Michel White, Anique Ducharme, Normand Racine, Michel Carrier
BACKGROUND: The SynCardia total artificial heart (TAH) provides complete circulatory support by replacing both native ventricles. Accepted indications include bridge to transplantation and destination therapy. We review our experience with TAH implantation during a period when axial flow pump became available. METHODS: We retrospectively analyzed the demographics, clinical characteristics and survival of all patients receiving the TAH. RESULTS: From September 2004 to November 2016, 13 patients (12 men, mean age 45 ± 13 yr) received the TAH for refractory cardiogenic shock secondary to idiopathic (56%) or ischemic (17%) cardiomyopathy and to other various causes (33%)...
October 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
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