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https://www.readbyqxmd.com/read/29352564/optical-metabolic-imaging-of-irradiated-rat-heart-exposed-to-ischemia-reperfusion-injury
#1
Mette Funding la Cour, Shima Mehrvar, James S Heisner, Mohammad Masoudi Motlagh, Meetha Medhora, Mahsa Ranji, Amadou K S Camara
Whole thoracic irradiation (WTI) is known to cause deterioration in cardiac function. Whether irradiation predisposes the heart to further ischemia and reperfusion (IR) injury is not well known. The aim of this study is to examine the susceptibility of rat hearts to IR injury following a single fraction of 15 Gy WTI and to investigate the role of mitochondrial metabolism in the differential susceptibility to IR injury. After day 35 of irradiation, ex vivo hearts from irradiated and nonirradiated rats (controls) were exposed to 25-min global ischemia followed by 60-min IR, or hearts were perfused without IR for the same protocol duration [time controls (TC)]...
January 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29352276/arrhythmogenic-drugs-can-amplify-spatial-heterogeneities-in-the-electrical-restitution-in-perfused-guinea-pig-heart-an-evidence-from-assessments-of-monophasic-action-potential-durations-and-jt-intervals
#2
Oleg E Osadchii
Non-uniform shortening of the action potential duration (APD90) in different myocardial regions upon heart rate acceleration can set abnormal repolarization gradients and promote arrhythmia. This study examined whether spatial heterogeneities in APD90 restitution can be amplified by drugs with clinically proved proarrhythmic potential (dofetilide, quinidine, procainamide, and flecainide) and, if so, whether these effects can translate to the appropriate changes of the ECG metrics of ventricular repolarization, such as JT intervals...
2018: PloS One
https://www.readbyqxmd.com/read/29352146/effects-of-renal-denervation-on-cardiac-structural-and-functional-abnormalities-in-patients-with-resistant-hypertension-or-diastolic-dysfunction
#3
Shiying Wang, Suxia Yang, Xinxin Zhao, Jun Shi
The aim of the present study is to systematically evaluate the impact of RDN on cardiac structure and function in patients with resistant hypertension (RH) or diastolic dysfunction. We retrieved Pubmed, Embase and Cocharane Library databases, from inception to April 1st, 2016. Studies reporting left ventricular mass (LVMI) or left ventricular (LV) diastolic function (reflected by the ratio of mitral inflow velocity to annular relaxation velocity [E/e']) responses to RDN were included. Two randomized controlled trials (RCTs), 3 controlled studies and 11 uncontrolled studies were finally identified...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352041/stress-signaling-jnk2-crosstalk-with-camkii-underlies-enhanced-atrial-arrhythmogenesis
#4
Jiajie Yan, Weiwei Zhao, Justin K Thomson, Xianlong Gao, Dominic M DeMarco, Elena Carrillo, Biyi Chen, Xiaomin Wu, Kenneth S Ginsburg, Mamdouh Bakhos, Donald M Bers, Mark E Anderson, Long-Sheng Song, Michael Fill, Xun Ai
Rationale: Atrial fibrillation (AF) is the most common arrhythmia and advanced age is an inevitable and predominant AF risk factor. However, the mechanisms that couple aging and AF propensity remain unclear, making targeted therapeutic interventions unattainable. Objective: To explore the functional role of an important stress-response c-Jun N-terminal kinase (JNK) in sarcoplasmic reticulum (SR) Ca2+ handling and consequently Ca2+-mediated atrial arrhythmias. Methods and Results: We employed a series of cutting-edge electrophysiological and molecular techniques, exploited the power of transgenic mouse models to detail the molecular mechanism, and verified its clinical applicability in parallel studies on donor human hearts...
January 19, 2018: Circulation Research
https://www.readbyqxmd.com/read/29352010/genetics-of-syndromic-and-non-syndromic-mitral-valve-prolapse
#5
REVIEW
Thierry Le Tourneau, Jean Mérot, Antoine Rimbert, Solena Le Scouarnec, Vincent Probst, Hervé Le Marec, Robert A Levine, Jean-Jacques Schott
Mitral valve prolapse (MVP) is a common condition that affects 2%-3% of the general population. MVP is thought to include syndromic forms such as Marfan syndrome and non-syndromic MVP, which is the most frequent form. Myxomatous degeneration and fibroelastic deficiency (FED) are regarded as two different forms of non-syndromic MVP. While FED is still considered a degenerative disease associated with ageing, frequent familial clustering has been demonstrated for myxomatous MVP. Familial and genetic studies led to the recognition of reduced penetrance and large phenotypic variability, and to the identification of prodromal or atypical forms as a part of the complex spectrum of the disease...
January 19, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29351658/intensive-versus-conventional-blood-pressure-monitoring-in-a-general-practice-population-the-blood-pressure-reduction-in-danish-general-practice-trial-a-randomized-controlled-parallel-group-trial
#6
Pia Klarskov, Lia E Bang, Peter Schultz-Larsen, Hans Gregers Petersen, David Benee Olsen, Ronan M G Berg, Henrik Abrahamsen, Niels Wiinberg
Objective: To compare the effect of a conventional to an intensive blood pressure monitoring regimen on blood pressure in hypertensive patients in the general practice setting. Design: Randomized controlled parallel group trial with 12-month follow-up. Setting: One hundred and ten general practices in all regions of Denmark. Participants: One thousand forty-eight patients with essential hypertension. Intervention: Conventional blood pressure monitoring ('usual group') continued usual ad hoc blood pressure monitoring by office blood pressure measurements, while intensive blood pressure monitoring ('intensive group') supplemented this with frequent home blood pressure monitoring and 24-hour ambulatory blood pressure monitoring...
January 17, 2018: Family Practice
https://www.readbyqxmd.com/read/29351544/long-term-exposure-to-fine-particulate-matter-blood-pressure-and-incident-hypertension-in-taiwanese-adults
#7
Zilong Zhang, Cui Guo, Alexis K H Lau, Ta-Chien Chan, Yuan Chieh Chuang, Changqing Lin, Wun Kai Jiang, Eng-Kiong Yeoh, Tony Tam, Kam S Woo, Bryan P Yan, Ly-Yun Chang, Martin C S Wong, Xiang Qian Lao
BACKGROUND: Long-term exposure to particulate matter (PM) air pollution may increase blood pressure and the risk of hypertension. However, epidemiological evidence is scarce and inconsistent. OBJECTIVES: We investigated the associations between long-term exposure to PM with an aerodynamic diameter <2.5μm (PM2.5), blood pressure, and incident hypertension in a large Taiwanese cohort. METHODS: We studied 361,560 adults ≥18y old from a large cohort who participated in a standard medical examination program during 2001 to 2014...
January 18, 2018: Environmental Health Perspectives
https://www.readbyqxmd.com/read/29351470/increased-pro-renin-receptor-expression-in-subfornical-organ-neurons-in-hypertensive-humans
#8
Silvana G Cooper, Darshan P Trivedi, Rieko Yamamoto, Caleb J Worker, Cheng-Yuan Feng, Jacob T Sorensen, Wei Yang, Zhenggang Xiong, Yumei Feng
The central nervous system plays an important role in essential hypertension in humans and in animal models of hypertension through modulation of sympathetic activity, and sodium and body fluid homeostasis. Data from animal models of hypertension suggest that the renin-angiotensin system in the subfornical organ (SFO) of the brain is critical for hypertension development. We recently reported that the brain (pro)renin receptor (PRR) is a novel component of the brain renin-angiotensin system and could be a key initiator of the pathogenesis of hypertension...
December 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351232/dietary-acid-load-and-potassium-intake-associate-with-blood-pressure-and-hypertension-prevalence-in-a-representative-sample-of-the-german-adult-population
#9
Danika Krupp, Jonas Esche, Gert Bernardus Maria Mensink, Stefanie Klenow, Michael Thamm, Thomas Remer
Diets rich in fruits and vegetables, like the Dietary Approaches to Stop Hypertension (DASH)-diet, are usually characterized by high potassium intake and reduced dietary acid load, and have been shown to reduce blood pressure (BP). However, the relevance of potential renal acid load (PRAL) for BP has not been compared with the relevance to BP of urinary biomarker (K-urine)- and dietary food frequency questionnaire (K-FFQ)-based estimates of potassium intake in a general adult population sample. For 6788 participants (aged 18-79 years) of the representative German Health-Interview and Examination Survey for Adults (DEGS1), associations of PRAL, K-urine, and K-FFQ with BP and hypertension prevalence were cross-sectionally examined in multivariable linear and logistic regression models...
January 19, 2018: Nutrients
https://www.readbyqxmd.com/read/29351144/cardiac-dysfunction-in-critical-illness
#10
Allison Dalton, Sajid Shahul
PURPOSE OF REVIEW: Sepsis and septic shock are prevalent conditions that are likely to increase in prevalence in the future. Given the high mortality and morbidity associated with sepsis and sepsis-induced cardiac dysfunction, we must continue to make advances in knowledge of the complex physiologic interactions and how we may target specific mediators for potential therapeutic options in the future. RECENT FINDINGS: Multiple biomarkers have been discovered, which when assayed in sepsis-induced cardiomyopathy predict morbidity and mortality...
January 17, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29351002/protective-effect-of-the-standardized-leaf-extract-of-ginkgo-biloba-egb761-against-hypertension-induced-renal-injury-in-rats
#11
Ahmed O Abdel-Zaher, Hanan S M Farghaly, Abeer E M El-Refaiy, Ahmed M Abd-Eldayem
BACKGROUND: Ginkgo biloba leaves extract has been widely used worldwide to protect against oxidative stress-induced cell damage and improves blood circulation. METHODS: The potential protective role of the standardized leaf extract of Ginkgo biloba (EGb761) on hypertension-induced renal injury was investigated in rats. Hypertension was induced in rats by L-NAME. RESULT: Repeated treatment with EGb761 produced progressive reductions in the systolic, diastolic and mean arterial blood pressure...
January 19, 2018: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29350379/metabolic-syndrome-in-hiv-infected-adults-in-poland
#12
Magdalena Rogalska-Płońska, Anna Grzeszczuk, Paweł Rogalski, Mariusz Łucejko, Robert Flisiak
BACKGROUND: Metabolic syndrome (MS) is usually diagnosed based on presence of abdominal obesity, elevated blood pressure, elevated fasting plasma glucose, high serum triglycerides (TG) and low high-density lipoprotein levels (HDL). Whether HIV is associated with a higher prevalence of metabolic syndrome than general population remains unclear. AIM: Aim of the study was to determine the incidence of metabolic syndrome in the population of HIV infected adults and its association with clinical, virological and biochemical features...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350093/thiobarbituric-acid-reactive-substances-relate-to-arterial-stiffness-and-blood-pressure-in-6-to-8-year-old-boys-stratified-by-maternal-risk
#13
Ashleigh Craig, Catharina M C Mels, Ruan Kruger
Early cardiovascular disease (CVD) onset can be inflicted by familial cardiovascular and lifestyle risk factors. We aimed to compare phenotypic characteristics and explore associations between oxidative stress and vascular function in boys stratified by maternal cardiovascular and lifestyle risk. We included 40 Black and 41 White boys (ages 6-8 years), along with the biological mother of each child. The study population was divided into two groups (nonmaternal risk vs. maternal risk) according to maternal risk predetermined by their selfreported cardiovascular and lifestyle risk factors...
January 19, 2018: Free Radical Research
https://www.readbyqxmd.com/read/29349824/reduced-left-ventricular-filling-following-blood-volume-extraction-does-not-result-in-compensatory-augmentation-of-cardiac-mechanics
#14
Rachel Lord, David MacLeod, Keith George, David Oxborough, Rob Shave, Mike Stembridge
An acute non-invasive reduction in preload has been shown to augment cardiac mechanics to maintain stroke volume and cardiac output. Such interventions induce concomitant changes in heart rate (HR), whereas blood volume extraction reduces preload without HR changes. Therefore, the purpose of this study was to determine whether a preload reduction in isolation resulted in augmented stroke volume achieved via enhanced cardiac mechanics. Nine healthy volunteers (4 female, age 29 ± 11 years) underwent echocardiography for the assessment of left ventricular (LV) volumes and mechanics in a supine position at baseline and end-extraction following the controlled removal of 25% of total blood volume (1062 ± 342 ml)...
January 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29349700/adrenergic-and-metabolic-effects-of-electrical-weapons-review-and-meta-analysis-of-human-data
#15
REVIEW
S N Kunz, H G Calkins, J Adamec, M W Kroll
INTRODUCTION: Electronic control with the CEW (conducted electrical weapon) has gained widespread acceptance as the preferred force option due to its significant injury reduction. However, a CEW application does stress the human body. In the case of the CEW, the human body response is similar to the challenge of physical exercise combined with emotional stress over a very short time interval. There has been concern whether the tension of the skeletal-muscle system together with the emotional stress of being exposed to the effects of a CEW, can lead to severe metabolic dysfunction...
January 19, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29349558/sglt2-inhibitors-and-mechanisms-of-hypertension
#16
REVIEW
Alexandros Briasoulis, Omar Al Dhaybi, George L Bakris
PURPOSE OF REVIEW: We sought to review currently available data on the safety and efficacy of sodium-glucose cotransporter 2 (SGLT2) inhibitors in type 2 diabetes mellitus patients with hypertension. RECENT FINDINGS: Inhibition of SGLT2 in the renal proximal tubule results in increased urinary glucose excretion and modest improvements of hemoglobin A1C. Treatment with any of the three currently FDA-approved SGLT2 inhibitors (canagliflozin, dapagliflozin, empagliflozin) results in sustained systolic and diastolic blood pressure reduction, in part via minimal natriuresis and possible reductions in sympathetic tone...
January 19, 2018: Current Cardiology Reports
https://www.readbyqxmd.com/read/29348420/gender-related-differences-in-heart-failure-with-preserved-ejection-fraction
#17
Franz Duca, Caroline Zotter-Tufaro, Andreas A Kammerlander, Stefan Aschauer, Christina Binder, Julia Mascherbauer, Diana Bonderman
Heart failure with preserved ejection fraction (HFpEF) affects more women than men, suggesting gender to play a major role in disease evolution. However, studies investigating gender differences in HFpEF are limited. In the present study we aimed to describe gender differences in a well-characterized HFpEF cohort. Consecutive HFpEF patients underwent invasive hemodynamic assessment, cardiac magnetic resonance imaging and exercise testing. Study endpoints were: cardiac death, a combined endpoint of HF hospitalization or cardiac death and all-cause death...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348380/effect-of-nigella-sativa-seed-extract-for-hypertension-in-elderly-a-double-blind-randomized-controlled-trial
#18
Aulia Rizka, Siti Setiati, Aida Lydia, Esthika Dewiasty
BACKGROUND: Nigella sativa (NS) seed extract shows diuretic activity, inhibits sympathetic nervous system overactivity and increases the production of Nitric Oxide in in vivo studies, thus it has a potential use as an adjuvant antihypertensive for elderly population. This study aimed to determine the effect of Nigella sativa seed extract to systolic blood pressure (SBP) and diastolic blood pressure (DBP) of elderly patients with hypertension. METHODS: a double-blind, randomized controlled trial was conducted on elderly subjects with hypertension in three outpatient clinics in Cipto Mangunkusumo National Hospital Jakarta Indonesia from June to September 2011...
October 2017: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/29348078/a-clinical-study-showing-altered-antioxidants-profile-in-patients-with-hypertension
#19
Abad Khan, Zafar Iqbal
We compared the plasma antioxidants level of normal control group with that of hypertensive patients in order to test the hypothesis "that antioxidants level has been diminished in hypertensive patients and that antioxidants are interconnected with each other making a network. The plasma and red blood cells antioxidants level of newly diagnosed hypertensive patients [(n=30), (mean age 53 years), (mean systolic BP 158 mmHg, mean diastolic BP 100 mmHg)] were compared to those of the control subjects [(n=30), (mean age 50 years), (mean systolic BP 126 mmHg, mean diastolic BP 90 mmHg)] using liquid chromatography linked with electrochemical detector (HPLC-ECD)...
January 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29346609/decreased-serum-levels-of-ghrelin-and-brain-derived-neurotrophic-factor-in-premenopausal-women-with-metabolic-syndrome
#20
Masoumeh Jabbari, Sorayya Kheirouri, Mohammad Alizadeh
Objective: We aimed to investigate the association between serum levels of ghrelin and brain-derived neurotrophic factor (BDNF) with MetS and its components in premenopausal women. Methods: 43 patients with MetS and 43 healthy controls participated in this study. Participants' body mass index (BMI), waist circumference (WC), systolic and diastolic blood pressure (SBP and DBP) were measured. Serum levels of total cholesterol (TC), triglyceride (TG), low and high density lipoprotein cholesterol (LDL-C and HDL-C), fasting blood sugar (FBS), insulin, BDNF and ghrelin determined...
January 12, 2018: Laboratory Medicine
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