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https://www.readbyqxmd.com/read/27904103/plasma-renin-activity-predicts-the-improvement-in-resistant-hypertension-after-percutaneous-transluminal-renal-artery-angioplasty
#1
Hyuma Daidoji, Yoshiaki Tamada, Saya Suzuki, Ken Watanabe, Taku Shikama, Yoku Kikuchi, Shigehiko Kato, Katsuaki Takahashi, Akio Fukui, Motoyuki Matsui, Tomoyasu Yahagi, Toshikazu Goto
Objective Percutaneous transluminal renal artery angioplasty (PTRA) has been recommended for the treatment of renovascular resistant hypertension. However, large randomized trials have reported that PTRA did not improve the outcomes compared with optimal medical therapy in patients with renal artery stenosis (RAS). It is important to identify patients with renovascular hypertension who are likely to respond to PTRA. We herein examined whether or not the plasma renin activity (PRA) could predict the improvement in resistant hypertension after PTRA for RAS...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27884236/renal-arterial-disease-and-hypertension
#2
REVIEW
Stephen C Textor
Renal artery disease produces a spectrum of progressive clinical manifestations ranging from minor degrees of hypertension to circulatory congestion and kidney failure. Moderate reductions in renal blood flow do not induce tissue hypoxia or damage, making medical therapy for renovascular hypertension feasible. Several prospective trials indicate that optimized medical therapy using agents that block the renin-angiotensin system should be the initial management. Evidence of progressive disease and/or treatment failure should allow recognition of high-risk subsets that benefit from renal revascularization...
January 2017: Medical Clinics of North America
https://www.readbyqxmd.com/read/27881877/exercise-training-attenuates-renovascular-hypertension-partly-via-ras-ros-glutamate-pathway-in-the-hypothalamic-paraventricular-nucleus
#3
Yan Zhang, Xiao-Jing Yu, Wen-Sheng Chen, Hong-Li Gao, Kai-Li Liu, Xiao-Lian Shi, Xiao-Yan Fan, Lin-Lin Jia, Wei Cui, Guo-Qing Zhu, Jin-Jun Liu, Yu-Ming Kang
Exercise training (ExT) has been reported to benefit hypertension; however, the exact mechanisms involved are unclear. We hypothesized that ExT attenuates hypertension, in part, through the renin-angiotensin system (RAS), reactive oxygen species (ROS), and glutamate in the paraventricular nucleus (PVN). Two-kidney, one-clip (2K1C) renovascular hypertensive rats were assigned to sedentary (Sed) or treadmill running groups for eight weeks. Dizocilpine (MK801), a glutamate receptor blocker, or losartan (Los), an angiotensin II type1 receptor (AT1-R) blocker, were microinjected into the PVN at the end of the experiment...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27861171/snakes-and-hypertension
#4
Edward D Miller
Constriction of the renal artery and controlled reduction of renal perfusion pressure is followed by a prompt increase in systemic renin activity and a concomitant rise in blood pressure in trained, unanesthetized dogs. The elevated blood pressure induced by the renal artery stenosis can be prevented by prior treatment with the nonapeptide Pyr-Trp-Pro-Arg-Pro-Gln-Ile-Pro-Pro, which blocks conversion of angiotensin I to angiotensin II. Further, the nonapeptide can restore systemic pressure to normal in the early phase of renovascular hypertension...
November 17, 2016: Anesthesiology
https://www.readbyqxmd.com/read/27843211/transplant-renal-artery-stenosis-the-impact-of-endovascular-management-and-their-outcomes
#5
Avinash Bapusaheb Patil, D Ramesh, Sanjay C Desai, Prasad Mylarappa, Sri Harsha Guttikonda, Sandeep Puvvada
INTRODUCTION: Transplant renal artery stenosis (TRAS) is a well-known vascular complication of renal transplantation. The aim of this analysis was to assess the short and midterm outcomes of endovascular therapy to salvage transplant kidney. METHODS: We retrospectively analyzed our transplant database from 2000 to 2015. Percutaneous transluminal angioplasty/stenting was done in 24 patients (22 men and two women) with significant TRAS. The mean age was 59 ± 12 years...
October 2016: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/27827286/-hypertension-due-to-fibromuscular-dysplasia-look-for-additional-disease-sites
#6
M L Maas, J M Kroese, S J H Bredie, C T Postma, F E de Leeuw, L J Schultze Kool, N P Riksen
Fibromuscular dysplasia (FMD) is a non-inflammatory, non-atherosclerotic vasculopathy that can lead to arterial stenosis, occlusion, aneurysms, and dissection. FMD of the renal arteries can lead to renovascular hypertension. Percutaneous angioplasty of the renal arteries (PTRA) can lead to normalization of blood pressure in 45% of patients with renal artery stenosis caused by FMD, particularly in younger patients and patients with a short history of hypertension. A considerable number of the patients with renovascular FMD also have cervical FMD, which can lead to ischaemic or haemorrhagic stroke...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27783256/predictive-factors-of-renal-toxicities-related-to-anti-vegfr-multikinase-inhibitors-in-phase-1-trials
#7
Emilie Boissier, Olivier Mir, Antoine Hollebecque, Hassan Izzedine, Stéphane Ederhy, Anas Gazzah, Rastislav Bahleda, Christophe Massard, Isabelle Macquin-Mavier, Christophe Tournigand, Jean-Philippe Spano, Jean-Charles Soria, Benoît Rousseau
Purpose Renal toxicities are common with angiogenesis multikinase inhibitors (AMKI), and can be limiting in phase I trials. Factors associated with such toxicities are poorly known. The aims of this exploratory study were to describe renovascular toxicities associated with AMKI, impact on drug development and to identify baseline parameters associated with the occurrence of renal toxicities in phase I trials. Methods Consecutive patients treated with AMKI in Gustave Roussy phase I unit between October 2005 and August 2013 were included...
October 25, 2016: Investigational New Drugs
https://www.readbyqxmd.com/read/27774260/improvement-of-left-ventricular-filling-and-pulmonary-artery-pressure-following-unilateral-renal-artery-total-occlusion-stenting-in-a-patient-with-recurrent-congestive-heart-failure-complicated-by-renovascular-hypertension-and-renal-failure
#8
Osami Kawarada, Ryota Kitajima, Yasuo Sugano, Teruo Noguchi, Toshihisa Anzai, Hisao Ogawa, Satoshi Yasuda
Recurrent congestive heart failure related to renal artery disease is an important clinical entity that is typically observed in bilateral renal artery stenosis or solitary functioning kidney. However, the relationship between heart failure and unilateral renal artery disease, especially that with total occlusion, remains unclear. We report a successful management by unilateral renal artery total occlusion stenting with an evidence of improvement of left ventricular filling and pulmonary artery pressure in case of a patient suffering from medical therapy resistant recurrent congestive heart failure with preserved ejection fraction...
December 2015: ESC Heart Failure
https://www.readbyqxmd.com/read/27753970/os-11-03-role-of-renal-nervous-activity-in-the-development-of-renovascular-hypertension-in-rats
#9
Akira Nishiyama, Hirofumi Hitomi, Daisuke Nakano, Yoshihide Fujisawa
OBJECTIVE: Clinical studies have indicated that renal denervation (RDN) suppresses sympathetic overactivity in hypertensive patients, suggesting that afferent renal nerve activity (ARNA) enhances sympathetic outflow via central nervous system. To investigate the possible role of ARNA in the pathophysiology of renovascular hypertension, we examined the effect of RDN on blood pressure and urinary norepinephrine in two-kidney, one-clip (2K1C) Goldblatt rats. DESIGN AND METHOD: Male Wister-Kyoto rats were divided 3 groups: sham, 2K1C and 2K1C with RDN...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27753855/hw-01-3-cardiac-and-vascular-mri-in-hypertension-evaluation
#10
Sang-Chol Lee
Chronic hypertension can result in deleterious effects on various vascular organs including the heart and vessels. Cardiovascular magnetic resonance (CMR) has the unique advantage of the ability to assess ventricular volumes and function, valvular abnormalities, vascular pathology, myocardial perfusion and tissue characterization with high accuracy and reproducibility and also avoid the risk of radiation. As this is the case, CMR seems to be an ideal method for comprehensive assessment of patients with systemic hypertension...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27747454/non-invasive-imaging-cannot-replace-formal-angiography-in-the-diagnosis-of-renovascular-hypertension
#11
Agnes Trautmann, Derek J Roebuck, Clare A McLaren, Eileen Brennan, Stephen D Marks, Kjell Tullus
OBJECTIVES: Renovascular disease (RVD) is found in about 10 % of secondary childhood hypertension. Digital subtraction angiography (DSA) is the gold standard to diagnose RVD. Non-invasive imaging methods like Doppler ultrasound (US), magnetic resonance angiography (MRA), and computed tomography angiography (CTA) are increasingly used. Our aim was to evaluate the role and accuracy of US, MRA, and CTA compared to DSA in diagnosing RVD in children. PATIENTS AND METHODS: A retrospective review of 127 children with suspected renovascular hypertension was performed in children referred to Great Ormond Street Hospital between 2006 and 2014 due to clinical suspicion of renovascular hypertension and/or findings on US and/or MRA or CTA...
October 17, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27743016/short-term-treatment-with-nitrate-is-not-sufficient-to-induce-in-vivo-antithrombotic-effects-in-rats-and-mice
#12
K Kramkowski, A Leszczynska, K Przyborowski, B Proniewski, N Marcinczyk, U Rykaczewska, D Jarmoc, E Chabielska, S Chlopicki
In humans, short-term supplementation with nitrate is hypotensive and inhibits platelet aggregation via an nitric oxide (NO)-dependent mechanism. In the present work, we analyzed whether short-term treatment with nitrate induces antithrombotic effects in rats and mice. Arterial thrombosis was evoked electrically in a rat model in which renovascular hypertension was induced by partial ligation of the left renal artery. In mice expressing green fluorescent protein, laser-induced thrombosis was analyzed intravitally by using confocal microscope...
October 14, 2016: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/27742806/renal-sympathetic-denervation-attenuates-hypertension-and-vascular-remodeling-in-renovascular-hypertensive-rats
#13
Peng Li, Pei-Pei Huang, Yun Yang, Chi Liu, Yan Lu, Fang Wang, Wei Sun, Xiang-Qing Kong
Sympathetic activity is enhanced in patients with essential or secondary hypertension, as well as in various hypertensive animal models. Therapeutic targeting of sympathetic activation is considered an effective antihypertensive strategy. We hypothesized that renal sympathetic denervation (RSD) attenuates hypertension and improves vascular remodeling and renal disease in the 2-kidney, 1-clip (2K1C) rat model. Rats underwent 2K1C modeling or sham surgery; then, rats underwent RSD or sham 4 weeks later, thus resulting in four groups (normotensive-sham, normotensive-RSD, 2K1C-sham, and 2K1C-RSD)...
October 14, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27738466/surgical-treatment-of-abdominal-aortic-aneurysm-with-congenital-solitary-pelvic-kidney-and-superior-mesenteric-artery-stenosis
#14
Takaaki Saito, Hiroki Tanaka, Naoto Yamamoto, Kazunori Inuzuka, Masaki Sano, Naoki Unno
We report the rare case of a 54-year-old man with uncontrolled renovascular hypertension, who was found to have an abdominal aortic aneurysm with congenital solitary pelvic kidney and superior mesenteric artery stenosis. A single renal artery branched from aneurysmal aortic bifurcation, and both the renal artery and the superior mesenteric artery (SMA) had severe stenosis at their origins. The aneurysm was repaired with a bifurcated Dacron graft, to which the renal artery was anastomosed. SMA bypass was created between the graft's left limb and the SMA using another Dacron graft...
2016: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/27718287/obstetrical-management-of-patients-with-extra-anatomic-vascular-bypass-grafts-due-to-takayasu-arteritis
#15
Naoyuki Miyasaka, Makiko Egawa, Mitsuaki Isobe, Yoshinori Inoue, Toshiro Kubota
Little is known about the obstetrical management of patients with Takayasu arteritis (TA) who have undergone extra-anatomic vascular bypass (EAVB). We describe two cases of EAVB. Case 1 underwent EAVB due to renovascular hypertension associated with stenosis of the abdominal aorta, and Case 2 due to amaurosis fugax episodes associated with stenosis of the brachiocephalic and left common carotid arteries. Pregnancy outcomes were favorable for both cases, though the original symptoms recurred during the third trimester in each case, possibly due to increased blood flow to the pregnant uterus...
October 8, 2016: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/27687328/reconstruction-for-renal-artery-aneurysms-using-the-tailoring-technique
#16
Mansur Duran, Daniel Ferdinand Hausmann, Klaus Grabitz, Hubert Schelzig, Florian Simon, Tolga Atilla Sagban
OBJECTIVE: Renal artery (RA) aneurysm (RAA) is a rare and complex disease. Treatment options for a RAA include endovascular surgery and open surgery with ex vivo repair or in situ reconstruction. This study evaluated the long-term outcome after vascular reconstruction of RAAs using the tailoring technique. Tailoring or aneurysmorrhaphy means a partial resection of the aneurysm with direct suture of the remaining arterial wall. METHODS: A single-center retrospective study was conducted between January 1990 and December 2015...
September 26, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27685329/intravascular-delivery-of-biologics-to-the-rat-kidney
#17
Federico Franchi, Xiang Yang Zhu, Tyra A Witt, Lilach O Lerman, Martin Rodriguez-Porcel
The renal microvascular compartment plays an important role in the progression of kidney disease and hypertension, leading to the development of End Stage Renal Disease with high risk of death for cardiovascular events. Moreover, recent clinical studies have shown that renovascular structure and function may have a great impact on functional renal recovery after surgery. Here, we describe a protocol for the delivery of drugs into the renal artery of rats. This procedure offers significant advantages over the frequently used systemic administration as it may allow a more localized therapeutic effect...
2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27679718/approach-to-atherosclerotic-renovascular-disease-2016
#18
Reem Daloul, Aubrey R Morrison
The management of atherosclerotic renal artery stenosis in patients with hypertension or impaired renal function remains a clinical dilemma. The current general consensus, supported by the results of the Angioplasty and Stenting for Renal Atherosclerotic Lesions and Cardiovascular Outcomes for Renal Artery Lesions trials, argues strongly against endovascular intervention in favor of optimal medical management. We discuss the limitations and implications of the contemporary clinical trials and present our approach and formulate clear recommendations to help with the management of patients with atherosclerotic narrowing of the renal artery...
October 2016: Clinical Kidney Journal
https://www.readbyqxmd.com/read/27673327/roles-of-hdac2-and-hdac8-in-cardiac-remodeling-in-renovascular-hypertensive-rats-and-the-effects-of-valproic-acid-sodium
#19
Rui-Fang Li, Shan-Shan Cao, Wei-Jin Fang, Ying Song, Xue-Ting Luo, Hong-Yun Wang, Jian-Gang Wang
Recent studies indicate that histone deacetylases (HDACs) activity is associated with the development and progression of cardiac hypertrophy. In this study, we investigated the effects of a HDACs inhibitor, valproic acid sodium (VPA), on cardiac remodeling and the differential expression of HDACs in left ventricles (LVs) of renovascular hypertensive rats. Renovascular hypertension was induced in rats by the two-kidney two-clip (2K2C) method. Cardiac remodeling, heart function and the differential expression of HDACs were examined at different weeks after 2K2C operation...
September 27, 2016: Pharmacology
https://www.readbyqxmd.com/read/27649588/renovascular-hypertension-effects-of-mesenchymal-stem-cells-in-the-contralateral-hypertensive-kidney-in-rats
#20
Elizabeth Barbosa de Oliveira-Sales, Vanessa Araujo Varela, Edgar Maquigussa, Fernanda Teixeira Borges, Caroline Gusson Shimoura, Guiomar Gomes, Ruy Ribeiro Campos, Mirian Aparecida Boim
Mesenchymal stem cells (MSC) induced neovascularization and improved renal morphology of the stenotic kidney in 2 kidneys-1 clip (2K-1C) model of renovascular hypertension. The present study evaluated the effects of MSC in the contralateral hypertensive kidney. Three weeks after left renal artery occlusion, MSC were injected into the tail vein of the 2K-1C rats. Renal function and morphology were analyzed in both kidneys. Labeled MSC were found in stenotic and contralateral kidneys. Hypertensive 2K-1C animals presented increased circulating levels of Angiotensin II (Ang II) and renin...
2016: Clinical and Experimental Hypertension: CHE
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