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https://www.readbyqxmd.com/read/28733447/mineralocorticoid-receptor-antagonists-attenuate-exaggerated-exercise-pressor-reflex-responses-in-hypertensive-rats
#1
Ryan M Downey, Masaki Mizuno, Jere Holloway Mitchell, Wanpen Vongpatanasin, Scott A Smith
Exaggerated heart rate (HR) and blood pressure responses to exercise in hypertension are mediated, in part, by overactivity of the exercise pressor reflex (EPR). The mechanisms underlying this EPR dysfunction have not been fully elucidated. Previous studies have shown that stimulation of mineralocorticoid receptors (MR) with exogenous administration of aldosterone in normal, healthy rats reproduces the EPR overactivity characteristic of hypertensive animals. Conversely, the purpose of this study was to examine whether antagonizing MR with spironolactone (SPIR) or eplerenone (EPL) in decerebrated hypertensive rats ameliorates abnormal EPR function...
July 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28730712/slow-conduction-through-an-arc-of-block-a-basis-for-arrhythmia-formation-post-myocardial-infarction
#2
Eugene Patterson, Benjamin J Scherlag, Edward J Berbari, Ralph Lazzara
INTRODUCTION: The electrophysiologic basis for characteristic rate-dependent, constant-late-coupled (390+54 msec) premature ventricular beats (PVBs) present 4-5 days following coronary artery occlusion were examined in 108 anesthetized dogs. METHODS AND RESULTS: Fractionated/double potentials were observed in injured zone bipolar and composite electrograms at prolonged sinus cycle lengths (1296 ± 396 msec). At shorter cycle lengths, conduction of the delayed potential decremented, separating from the initial electrogram by a progressively prolonged isoelectric interval...
July 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28729412/simple-scoring-system-to-predict-in-hospital-mortality-after-surgery-for-infective-endocarditis
#3
Giuseppe Gatti, Andrea Perrotti, Jean-François Obadia, Xavier Duval, Bernard Iung, François Alla, Catherine Chirouze, Christine Selton-Suty, Bruno Hoen, Gianfranco Sinagra, François Delahaye, Pierre Tattevin, Vincent Le Moing, Aniello Pappalardo, Sidney Chocron
BACKGROUND: Aspecific scoring systems are used to predict the risk of death postsurgery in patients with infective endocarditis (IE). The purpose of the present study was both to analyze the risk factors for in-hospital death, which complicates surgery for IE, and to create a mortality risk score based on the results of this analysis. METHODS AND RESULTS: Outcomes of 361 consecutive patients (mean age, 59.1±15.4 years) who had undergone surgery for IE in 8 European centers of cardiac surgery were recorded prospectively, and a risk factor analysis (multivariable logistic regression) for in-hospital death was performed...
July 20, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28727025/effect-of-handling-intensity-at-the-time-of-transport-for-slaughter-on-physiological-response-and-carcass-characteristics-in-beef-cattle-fed-ractopamine-hydrochloride
#4
J A Hagenmaier, C D Reinhardt, S J Bartle, J N Henningson, M J Ritter, M S Calvo-Lorenzo, G J Vogel, C A Guthrie, M G Siemens, D U Thomson
The effects of handling intensity on the physiological response and carcass characteristics of feedlot cattle fed ractopamine hydrochloride were evaluated at the time of transport to slaughter. Eighty steers (BW = 668 ± 36 kg) representing 10 lots of similar breed, frame size, and degree of finish were blocked by lot, stratified by weight, and randomly assigned to 1 of 2 handling intensities (HI) over a 1,600 m dirt alley course: 1) low-stress handling (LSH) or 2) high-stress handling (HSH). For the LSH treatment, 4 penmates were kept at a walk with the use of a lead rider...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28725938/declining-radiation-dose-of-coronary-computed-tomography-angiography-german-cardiac-ct-registry-experience-2009-2014
#5
Axel Schmermund, Mohamed Marwan, Jörg Hausleiter, Sebastian Barth, Oliver Bruder, Sebastian Kerber, Grigorius Korosoglou, Alexander Leber, Werner Moshage, Stephen Schröder, Steffen Schneider, Jochen Senges, Stephan Achenbach
BACKGROUND: Coronary computed tomography angiography (CTA) is increasingly used as a test to rule out coronary artery disease (CAD) in patients with a low to intermediate pre-test probability of the disease. We used the database of the German CT registry, collected between 2009 and 2014 in a broad patient population, to analyze contemporary radiation dose associated with coronary CTA in clinical practice. PATIENTS AND METHODS: The prospective observational registry included a total of 7061 patients ≥18 years, referred to 12 participating centers for a clinically indicated cardiac CT examination...
July 19, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28725553/behavioral-physiological-and-morphological-correlates-of-parasite-intensity-in-the-wild-cururu-toad-rhinella-icterica
#6
Eduardo Hermógenes Moretti, Braz Titon, Carla Bonetti Madelaire, Raquel de Arruda, Tatiana Alvarez, Fernando Ribeiro Gomes
Large numbers of parasites are found in various organs of anuran amphibians, with parasite intensities thought to modulate the host's Darwinian fitness traits. Interaction between the anuran hosts and their multiple parasites should modulate the host's phenotypic characteristic, such as those associated with high energetic demand (such as calling effort and locomotor performance), energy balance (standard metabolic rate), and morphological plasticity (as indicated by organ masses). The present study investigated the impact of parasite intensities on the behavioral, physiological, and morphological traits of wild adult male Rhinella icterica (Anura: Bufonidae)...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28724652/correlation-of-admission-heart-rate-with-angiographic-and-clinical-outcomes-in-patients-with-right-coronary-artery-st-segment-elevation-myocardial-infarction-undergoing-primary-percutaneous-coronary-intervention-horizons-ami-the-harmonizing-outcomes-with-revascularization
#7
Ioanna Kosmidou, Thomas McAndrew, Björn Redfors, Monica Embacher, José M Dizon, Roxana Mehran, Ori Ben-Yehuda, Gary S Mintz, Gregg W Stone
BACKGROUND: Bradycardia on presentation is frequently observed in patients with right coronary artery ST-segment elevation myocardial infarction, but it is largely unknown whether it predicts poor angiographic or clinical outcomes in that patient population. We sought to determine the prognostic implications of admission heart rate (AHR) in patients with ST-segment elevation myocardial infarction and a right coronary artery culprit lesion. METHODS AND RESULTS: We analyzed 1460 patients with ST-segment elevation myocardial infarction and a right coronary artery culprit lesion enrolled in the randomized HORIZONS-AMI (Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction) trial who underwent primary percutaneous coronary intervention...
July 19, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28720078/characteristics-of-cardio-cerebrovascular-modulation-in-patients-with-generalized-anxiety-disorder-an-observational-study
#8
Zhen-Ni Guo, Liangshu Feng, Xiuli Yan, Le Yang, Shuo Huang, Yingqi Xing, Yi Yang
BACKGROUND: Generalized anxiety disorder (GAD) has been shown in previous studies to display abnormal cerebral blood flow velocity (CBFV); however, the characteristics of cardio-cerebrovascular modulation are unknown. We aimed to analyze cardio-cerebrovascular modulation using parameters from a supine-to-standing test. METHODS: There are 2 parts to this study; in Part 1, 125 participants with Hamilton Anxiety scale scores ≥14 were enrolled, and 33 age- and sex-matched medically and psychiatrically healthy volunteers were recruited as control participants...
July 18, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28719664/predicting-the-protein-half-life-in-tissue-from-its-cellular-properties
#9
Mahbubur Rahman, Rovshan G Sadygov
Protein half-life is an important feature of protein homeostasis (proteostasis). The increasing number of in vivo and in vitro studies using high throughput proteomics provide estimates of the protein half-lives in tissues and cells. However, protein half-lives in cells and tissues are different. Due to the resource requirements for researching tissues, more data is available from cellular studies than tissues. We have designed a multivariate linear model for predicting protein half-life in tissue from its cellular properties...
2017: PloS One
https://www.readbyqxmd.com/read/28719311/infective-endocarditis-in-french-west-indies-a-13-year-observational-study
#10
Elisabeth Fernandes, Claude Olive, Jocelyn Inamo, François Roques, André Cabié, Patrick Hochedez
We conducted an observational study to describe the characteristics of infective endocarditis (IE) in French West Indies (FWI) and to identify variables associated with in-hospital case fatality. The records of the patients admitted for IE to the University Hospital of Martinique between 2000 and 2012 were collected using an electronic case report form. Only Duke-Li definite cases were considered for this analysis. Variables associated with in-hospital mortality were tested using univariate logistic regression analysis...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28711446/clinical-effectiveness-of-hydralazine-isosorbide-dinitrate-in-african-american-patients-with-heart%C3%A2-failure
#11
Boback Ziaeian, Gregg C Fonarow, Paul A Heidenreich
OBJECTIVES: This study sought to evaluate the effectiveness of hydralazine-isosorbide dinitrate (H-ISDN) in African Americans with heart failure (HF) with reduced ejection fraction (HFrEF). BACKGROUND: Among African-American patients with HFrEF, H-ISDN was found to improve quality of life and lower HF-related hospitalization and mortality rates in the A-HEFT (African-American Heart Failure Trial). Few studies have evaluated the effectiveness of this therapy in clinical practice...
July 12, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28708724/impact-of-ssf-on-diagnostic-performance-of-coronary-computed-tomography-angiography-within-1-heart-beat-in-patients-with-high-heart-rate-using-a-256-row-detector-computed-tomography
#12
Junfu Liang, Hui Wang, Lei Xu, Li Dong, Zhanming Fan, Rui Wang, Zhonghua Sun
OBJECTIVE: The aim of this study was to investigate the impact of a motion-correction algorithm on diagnostic accuracy of coronary computed tomography angiography (CCTA) within 1 heart beat in patients with high heart rate (HR) using a 256-row detector CT. METHOD: Sixty-four consecutive patients with known or suspected coronary artery disease (symptomatic) and with HR of 75 beats per minute or greater (mean [SD] HR, 82.6 [7.3] beats per minute) undergoing CCTA and invasive coronary angiography within 4 weeks were prospectively enrolled...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28706864/surgical-outcomes-of-isolated-tricuspid-valve-procedures-repair-versus-replacement
#13
Julius I Ejiofor, Robert C Neely, Maroun Yammine, Siobhan McGurk, Tsuyoshi Kaneko, Marzia Leacche, Lawrence H Cohn, Prem S Shekar
BACKGROUND: Isolated tricuspid valve (ITV) operations are infrequent and the decision to operate is controversial. We report a series of ITV operations to outline the current disease status requiring this uncommon procedure with an emphasis on the results of tricuspid valve repair (TVr) versus replacement (TVR). METHODS: Using our prospective cardiac surgery database, 57 patients who underwent ITV operations between 01/02-03/14 were identified. Median follow up time was 3...
May 2017: Annals of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28704537/non-invasive-localization-of-atrial-ectopic-beats-by-using-simulated-body-surface-p-wave-integral-maps
#14
Ana Ferrer-Albero, Eduardo J Godoy, Miguel Lozano, Laura Martínez-Mateu, Felipe Atienza, Javier Saiz, Rafael Sebastian
Non-invasive localization of continuous atrial ectopic beats remains a cornerstone for the treatment of atrial arrhythmias. The lack of accurate tools to guide electrophysiologists leads to an increase in the recurrence rate of ablation procedures. Existing approaches are based on the analysis of the P-waves main characteristics and the forward body surface potential maps (BSPMs) or on the inverse estimation of the electric activity of the heart from those BSPMs. These methods have not provided an efficient and systematic tool to localize ectopic triggers...
2017: PloS One
https://www.readbyqxmd.com/read/28702883/risk-factors-for-recurrent-emergency-department-visits-for-hyperglycemia-in-patients-with-diabetes-mellitus
#15
Justin W Yan, Katherine M Gushulak, Melanie P Columbus, Kristine van Aarsen, Alexandra L Hamelin, George A Wells, Ian G Stiell
BACKGROUND: Patients with poorly controlled diabetes mellitus may present repeatedly to the emergency department (ED) for management and treatment of hyperglycemic episodes, including diabetic ketoacidosis and hyperosmolar hyperglycemic state. The objective of this study was to identify risk factors that predict unplanned recurrent ED visits for hyperglycemia in patients with diabetes within 30 days of initial presentation. METHODS: We conducted a 1-year health records review of patients ≥18 years presenting to one of four tertiary care EDs with a discharge diagnosis of hyperglycemia, diabetic ketoacidosis, or hyperosmolar hyperglycemic state...
December 2017: International Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28702858/effect-of-renin-angiotensin-system-inhibitors-on-mortality-in-heart-failure-with-preserved-ejection-fraction-a-meta-analysis-of-observational-cohort-and-randomized-controlled-studies
#16
REVIEW
Hidekatsu Fukuta, Toshihiko Goto, Kazuaki Wakami, Nobuyuki Ohte
Despite the high mortality rate, there is no therapy to improve survival in heart failure with preserved ejection fraction (HFpEF). Large randomized controlled trials (RCTs) did not show clear mortality benefit of renin-angiotensin system (RAS) inhibitors (angiotensin-converting enzyme inhibitors or angiotensin receptor blockers) in HFpEF. However, because of the strict enrollment criteria, the patients who participated in these trials might represent a selected group of patients that is poorly representative of patients treated in routine clinical practice...
July 12, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28702121/occurrence-of-femoral-nerve-injury-among-patients-undergoing-transfemoral-percutaneous-catheterization-procedures-in-the-united-states
#17
Mohammad El-Ghanem, Ahmed A Malik, Andre Azzam, Hussam A Yacoub, Adnan I Qureshi, Nizar Souayah
BACKGROUND: The proximity of the femoral nerve to the femoral artery renders it vulnerable to injury during transfemoral percutaneous catheterization (TPC) procedures. OBJECTIVE: To determine the incidence of femoral nerve injury in patients undergoing cardiac catheterization in a nationally representative inpatient database. METHODS: We analyzed data released annually from the Nationwide Inpatient Sample. We pooled data from 2002 to 2010 and, using the ICD-9-CM procedure codes, identified patients who underwent TPC...
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28700736/short-term-rehospitalization-across-the-spectrum-of-age-and-insurance-types-in-the-united-states
#18
Jordan B Strom, Daniel B Kramer, Yun Wang, Changyu Shen, Jason H Wasfy, Bruce E Landon, Elissa H Wilker, Robert W Yeh
Few studies have examined rates and causes of short-term readmissions among adults across age and insurance types. We compared rates, characteristics, and costs of 30-day readmission after all-cause hospitalizations across insurance types in the US. We retrospectively evaluated alive patients ≥18 years old, discharged for any cause, 1/1/13-11/31/13, 2006 non-federal hospitals in 21 states in the Nationwide Readmissions Database. The primary stratification variable of interest was primary insurance. Comorbid conditions were assessed based on Elixhauser comorbidities, as defined by administrative billing codes...
2017: PloS One
https://www.readbyqxmd.com/read/28699055/recovery-of-heart-rate-variability-after-treadmill-exercise-analyzed-by-lagged-poincar%C3%A3-plot-and-spectral-characteristics
#19
Ping Shi, Sijung Hu, Hongliu Yu
The aim of this study was to analyze the recovery of heart rate variability (HRV) after treadmill exercise and to investigate the autonomic nervous system response after exercise. Frequency domain indices, i.e., LF(ms(2)), HF(ms(2)), LF(n.u.), HF(n.u.) and LF/HF, and lagged Poincaré plot width (SD1 m ) and length (SD2 m ) were introduced for comparison between the baseline period (Pre-E) before treadmill running and two periods after treadmill running (Post-E1 and Post-E2). The correlations between lagged Poincaré plot indices and frequency domain indices were applied to reveal the long-range correlation between linear and nonlinear indices during the recovery of HRV...
July 11, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28697718/high-survival-and-mortality-characteristics-in-heart-transplant-patients-at-a-national-institute
#20
Christian Rojas, Gabriel De la Cruz-Ku, Amr Yassen, Bryan Valcarcel-Valdivia
OBJECTIVES: The identification of variables related to the survival of heart transplant patients is vital for a good medical practice. Few studies have examined this issue in a Latin American population. Therefore, the aim of this study was to analyze, retrospectively, the survival and mortality characteristics of patients after heart transplant. MATERIALS AND METHODS: Information on patients was obtained through review of medical records; we collected information on all patients who underwent this procedure from 2010 to 2015...
July 11, 2017: Experimental and Clinical Transplantation
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