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Pulmonary blood flow

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https://www.readbyqxmd.com/read/27912200/is-cha2ds2-vasc-appropriate-for-hyperthyroid-patients-with-atrial-fibrillation-implications-of-adding-a-transesophageal-echocardiography-evaluation
#1
Marcus Vinicius Leitão de Souza, Patricia de Fátima Dos Santos Teixeira, Mario Vaisman, Sergio Salles Xavier
BACKGROUND: Anticoagulation remains a controversial issue among hyperthyroid patients with atrial fibrillation (AF). We aimed to evaluate the prevalence of the thrombogenic milieu (TM), detected using transesophageal echocardiography (TEE), among patients with AF related to hyperthyroidism, and to correlate these findings with the clinical embolic risk classification (CHA2DS2-VASc). METHODS: CHA2DS2-VASc score, thyroid hormonal status, time since hyperthyroidism diagnosis, transthoracic echocardiography (TTE) and TEE were assessed in 47 consecutive patients aged between 18 and 65years with AF related to hyperthyroidism...
November 10, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27910005/doppler-images-of-intra-pulmonary-shunt-within-atelectasis-in-anesthetized-children
#2
Cecilia M Acosta, Gerardo Tusman, Mauro Costantini, Camila Echevarría, Sergio Pollioto, Diego Abrego, Fernando Suarez-Sipmann, Stephan H Böhm
BACKGROUND: Doppler images of pulmonary vessels in pulmonary diseases associated with subpleural consolidations have been described. Color Doppler easily identifies such vessels within consolidations while spectral Doppler analysis allows the differentiation between pulmonary and bronchial arteries. Thus, Doppler helps in diagnosing the nature of consolidations. To our knowledge, Doppler analysis of pulmonary vessels within anesthesia-induced atelectasis has never been described before...
December 2016: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/27908945/norwood-procedure-for-palliation-of-hypoplastic-left-heart-syndrome-right-ventricle-to-pulmonary-artery-conduit-vs-modified-blalock-taussig-shunt
#3
Dorothy M Beke
Patients with hypoplastic left heart syndrome undergo a series of operations to separate the pulmonary and systemic circulations. The first of at least 3 operations occurs in the newborn period, with a stage I palliation. The goal of stage I palliation is to provide pulmonary blood flow and create an unobstructed systemic outflow tract. Advances in surgical techniques and intraoperative and postoperative care have helped decrease morbidity and mortality for patients with hypoplastic left heart syndrome who have the stage I Norwood operation, but the patients continue to be at increased risk for hemodynamic collapse and adverse outcomes...
December 2016: Critical Care Nurse
https://www.readbyqxmd.com/read/27908307/evolution-of-imaging-findings-laboratory-and-functional-parameters-in-rheumatoid-arthritis-patients-after-one-year-of-treatment-with-anti-tnf-%C3%AE-agents
#4
Efstathios E Detorakis, Eleftherios Magkanas, Ismini Lasithiotaki, Prodromos Sidiropoulos, Dimitrios T Boumpas, Nicholas Gourtsoyiannis, Katerina Antoniou, Maria Raissaki
OBJECTIVES: To investigate the efficacy and safety of anti-TNF-α agent treatment compared to non-biologic DMARDs in rheumatoid arthritis patients. METHODS: 82 consecutive patients, 29 males, 53 females, aged 42-79, diagnosed with RA and suitable for anti-TNF-α treatment composed two study groups: 42 with pre-existing rheumatoid arthritis-related interstitial lung disease (RA-ILD) and 40 without RA-ILD. Respective control groups consisted of 44 patients with pre-existing RA-ILD and 44 patients without RA-ILD, treated with non-biologic DMARDs...
October 27, 2016: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/27906706/effects-of-cardiopulmonary-bypass-on-renal-perfusion-filtration-and-oxygenation-in-patients-undergoing-cardiac-surgery
#5
Lukas Lannemyr, Gudrun Bragadottir, Vitus Krumbholz, Bengt Redfors, Johan Sellgren, Sven-Erik Ricksten
BACKGROUND: Acute kidney injury is a common complication after cardiac surgery with cardiopulmonary bypass. The authors evaluated the effects of normothermic cardiopulmonary bypass on renal blood flow, glomerular filtration rate, renal oxygen consumption, and renal oxygen supply/demand relationship, i.e., renal oxygenation (primary outcome) in patients undergoing cardiac surgery. METHODS: Eighteen patients with a normal preoperative serum creatinine undergoing cardiac surgery procedures with normothermic cardiopulmonary bypass (2...
December 1, 2016: Anesthesiology
https://www.readbyqxmd.com/read/27902842/vagal-denervation-inhibits-the-increase-in-pulmonary-blood-flow-during-partial-lung-aeration-at-birth
#6
Justin A R Lang, James T Pearson, Corinna Binder-Heschl, Megan J Wallace, Melissa L Siew, Marcus J Kitchen, Arjan B Te Pas, Robert A Lewis, Graeme R Polglase, Mikiyasu Shirai, Stuart B Hooper
Air entry into the lungs at birth triggers major cardiovascular changes, including a large increase in pulmonary blood flow (PBF) that is not spatially related to regional lung aeration. To investigate the possible underlying role of a vagally-mediated stimulus, we used simultaneous phase-contrast X-ray imaging and angiography in near-term (30 days of gestation) vagotomised (n = 15) or sham-operated (n = 15) rabbit kittens. Rabbits were imaged before ventilation, when one lung was ventilated (unilateral) with 100% nitrogen (N2 ), air or 100% oxygen (O2 ), before all kittens were switched to unilateral ventilation in air, then ventilation of both lungs using air...
November 30, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27886226/functional-improvement-and-regression-of-medial-hypertrophy-in-the-remodeled-pulmonary-artery-after-correction-of-systemic-left-to-right-shunt
#7
Chih-Hsin Hsu, Jun-Neng Roan, Jyh-Hong Chen, Chen-Fuh Lam
The presence of systemic left-to-right shunt and increased pulmonary blood flow can result in right heart failure and pulmonary arteriopathy. Correction of left-to-right shunt has been shown to improve cardiac function and physical performance. However, the cardiopulmonary remodeling processes following cessation of left-to-right shunt have yet to be reported. In this experimental study, excessive pulmonary flow was restored through ligation of the aortocaval fistula in rats with flow-induced pulmonary hypertension...
November 25, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27884421/interpreting-the-incremental-cardiopulmonary-exercise-test
#8
REVIEW
Samir Nusair
The incremental cardiopulmonary exercise test (CPET) is an increasingly used diagnostic method that serves to evaluate patients with chief complaint of dyspnea during exercise. Performing maximal symptom-limited CPET can show if the tested subject has a reduced exercise capacity and give clues to the mechanism of such exercise capacity reduction, cardiac, pulmonary, or pulmonary vascular source. In this review, it is suggested that the evaluation of the complex results of CPET should be performed by first determining if myocardial/circulatory insufficiency is present and second if there is gas exchange abnormality...
November 1, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27882023/effects-of-bisoprolol-in-combination-with-trimetazidine-on-the-treatment-of-heart-failure-and-concomitant-chronic-obstructive-pulmonary-disease
#9
Yuanyuan Ke, Dingli Xu, Minxiong Li, Zenglong Wu, Yongpeng Huang
OBJECTIVE: To evaluate the effects of bisoprolol combined with trimetazidine on the treatment of heart failure patients having concomitant chronic obstructive pulmonary disease (COPD); in comparison with control group treated with standard therapy only. METHODS: A total of 120 heart failure patients having concomitant COPD were selected and randomly divided into a control group and a treatment group according to different treatment methods (n=60). The control group was given continuous low flow oxygen inhalation and inotropic agents, and their cardiac stress was also reduced...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27878504/intra-and-inter-reader-reproducibility-of-blood-flow-measurements-on-the-ascending-aorta-and-pulmonary-artery-using-cardiac-magnetic-resonance
#10
Giovanni Di Leo, Ida Daniela D'Angelo, Marco Alì, Paola Maria Cannaò, Giovanni Mauri, Francesco Secchi, Francesco Sardanelli
The aim of our study was to estimate the intra- and inter-reader reproducibility of blood flow measurements in the ascending aorta and main pulmonary artery using cardiac magnetic resonance (CMR) and a semi-automated segmentation method. The ethics committee approved this retrospective study. A total of 50 consecutive patients (35 males and 15 females; mean age±standard deviation 27±13 years) affected by congenital heart disease were reviewed. They underwent CMR for flow analysis of the ascending aorta and main pulmonary artery (1...
November 22, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27878206/new-findings-on-venous-thrombogenesis
#11
James R Byrnes, Alisa S Wolberg
Venous thrombosis (VT) is the third most common cause of cardiovascular death worldwide. Complications from VT and pulmonary embolism are the leading cause of lost disability-adjusted life years. Risks include genetic (e.g., non-O blood group, activated protein C resistance, hyperprothrombinemia) and acquired (e.g., age, surgery, cancer, pregnancy, immobilisation, female hormone use) factors. Pathophysiologic mechanisms that promote VT are incompletely understood, but involve abnormalities in blood coagulability, vessel function, and flow (so-called Virchow's Triad)...
November 23, 2016: Hämostaseologie
https://www.readbyqxmd.com/read/27875559/efficacy-and-safety-of-anti-interleukin-5-therapy-in-patients-with-asthma-a-systematic-review-and-meta-analysis
#12
Fa-Ping Wang, Ting Liu, Zhu Lan, Su-Yun Li, Hui Mao
BACKGROUND: Recent trials have assessed the efficacy and safety of novel monoclonal antibodies such as reslizumab and benralizumab. However, the overall efficacy and safety anti-interleukin (IL) 5 treatment in asthma have not been thoroughly assessed. METHODS: Randomized controlled trials (RCTs) of anti-IL-5 treatment on patients with asthma published up to October 2016 in PubMed, Embase, and Cochrane Central Register of Controlled Trials (CENTRAL) that reported pulmonary function, quality of life scores, asthmatic exacerbation rate, blood and sputum eosinophil counts, short-acting β-agonist (SABA) rescue use, and adverse events were included...
2016: PloS One
https://www.readbyqxmd.com/read/27873442/forced-deflation-pulmonary-function-test-a-novel-method-to-evaluate-lung-function-in-infants-and-young-children
#13
Rakesh K Goyal, Azada Ibrahimova, Maria L Escolar, Paul Szabolcs, Mark Vander Lugt, Randy M Windreich, Daniel J Weiner
We describe the safety and feasibility of a forced deflation pulmonary function test (dPFT) in infants and young children. Fifty-two dPFT studies were performed in 26 patients (median age, 1.4 years). Forced vital capacity (FVC) and forced expiratory flow (FEF75 ) were normal in all except one case, but respiratory system compliance (Crs) was reduced in 24% patients. There were no significant differences in pre-blood and marrow transplantation FVC, FEF75 , and Crs between those patients who did and those who did not have posttransplant pulmonary complications...
November 22, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27873373/cardiac-output-and-blood-flow-redistribution-in-the-fetus-with-d-loop-transposition-of-the-great-arteries-and-intact-ventricular-septum-insights-into-the-pathophysiology
#14
Max E Godfrey, Kevin G Friedman, Monika Drogosz, Abraham M Rudolph, Wayne Tworetzky
OBJECTIVES: Although the postnatal physiology of D-loop transposition of the great arteries with intact ventricular septum (DTGA-IVS) is well established, little is known about fetal DTGA-IVS. In the normal fetus, the pulmonary valve (PV) is larger than the aortic valve (AoV), there is exclusive right to left flow at the foramen ovale (FO) and ductus arteriosus (DA), and the left ventricle (LV) ejects 40% of combined ventricular output (CVO) through the aorta, primarily to the brain. In DTGA-IVS, the LV ejects O2 -rich blood to the pulmonary artery, theoretically leading to pulmonary vasodilation, increased branch pulmonary arterial flow and reduced DA flow...
November 22, 2016: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/27873231/atherosclerotic-renal-artery-stenosis
#15
Robert Schoepe, Stephen McQuillan, Debbie Valsan, Geoffrey Teehan
Atherosclerotic Renal Artery Stenosis is a form or peripheral arterial disease that tends to affect older subjects with hyperlipidemia, history of tobacco use, and who have other coexistent forms of vascular insufficiency. An abdominal bruit on physical exam can be a helpful clue. Slowly progressive, it can lead to critical narrowing of the renal arteries which creates a cascade of events such as renin-angiotensin-aldosterone activation (RAAS), hypertension, acute pulmonary edema, and renal fibrosis. The hypertension is considered a secondary form and can even be resistant to multiple antihypertensives...
November 22, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27871765/-evaluation-of-cardiac-function-in-a-group-of-small-for-gestational-age-school-age-children-treated-with-growth-hormone
#16
Esther Aurensanz Clemente, Ariadna Ayerza Casas, Pilar Samper Villagrasa, Pablo Ruiz Frontera, Gloria Bueno Lozano
INTRODUCTION AND OBJECTIVES: Small for gestational age (SGA) patients have an increased risk of developing a cardiovascular pathology, as well as a metabolic syndrome. Our objective is to evaluate the cardiac morphology and function of SGA children treated with growth hormone (GH), identifying changes that could potentially have long-term consequences. METHODS: We selected 23 SGA school-age patients and 23 healthy children. We measured their weight, height, blood pressure and heart rate...
November 18, 2016: Medicina Clínica
https://www.readbyqxmd.com/read/27866675/hemodynamics-of-patient-specific-aorta-pulmonary-shunt-configurations
#17
Senol Piskin, H Firat Altin, Okan Yildiz, Ihsan Bakir, Kerem Pekkan
Optimal hemodynamics in aorta-pulmonary shunt reconstruction is essential for improved post-operative recovery of the newborn congenital heart disease patient. However, prior to in vivo execution, the prediction of post-operative hemodynamics is extremely challenging due to the interplay of multiple confounding physiological factors. It is hypothesized that the post-operative performance of the surgical shunt can be predicted through computational blood flow simulations that consider patient size, shunt configuration, cardiac output and the complex three-dimensional disease anatomy...
November 11, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27866544/-effects-of-chronic-exposure-to-monochloroacetic-acid-on-the-lung-function-and-lymphocyte-subsets-in-occupational-exposed-workers
#18
T Meng, J Jia, P P Miao, M L Shen, Y Niu, Y F Dai
Objective: To investigate the effects of chronic exposure to monochloroacetic acid on the lung function and whole blood counts in occupational exposed workers, and provide new markers for occupational health surveillance. Methods: We conducted a cross-sectional molecular epidemiology study of 121 workers who were occupationally exposed to monochloroacetic acid and 69 unexposed workers frequency-matched by age and smoking status from the same geographic region. The lung function was measured by portable lung function instrument, and the lymphocyte subsets were measured by flow cytometry...
September 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/27865733/systolic-and-diastolic-unloading-by-mechanical-support-of-the-acute-vs-the-chronic-pressure-overloaded-right-ventricle
#19
Tom Verbelen, Daniel Burkhoff, Keiichiro Kasama, Marion Delcroix, Filip Rega, Bart Meyns
BACKGROUND: Right ventricular (RV) mechanical support is well described in cases of sudden increase in RV afterload. In cases of chronic RV pressure overload (e.g., pulmonary arterial hypertension), it has rarely been described. METHODS: The pulmonary artery was banded in 18 sheep. In the acute group (n = 9), we immediately implanted a Synergy Pocket Micro-Pump. Blood was withdrawn from the right atrium to the pulmonary artery. In the chronic group (n = 9), this pump was implanted 8 weeks after banding...
October 17, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27862912/stenting-of-the-ductus-arteriosus-in-infants-with-functionally-univentricular-heart-disease-and-ductal-dependent-pulmonary-blood-flow-a-single-center-experience
#20
Ahmet Celebi, Ilker Kemal Yucel, Mustafa Orhan Bulut, Mehmet Kucuk, Sevket Balli
OBJECTIVE: To determine the short- and medium-term outcomes of ductal stenting (DS) in patients with functionally univentricular hearts (FUHs) and ductal-dependent pulmonary blood flow. BACKGROUND: Several studies have evaluated the outcomes of DS in a limited number of patients with FUHs. Nonetheless, there is still no consensus regarding the indications for this procedure, and no appropriate patient selection criteria have been devised. METHODS: From 2005 to 2015, cardiac catheterization for DS was performed in 68 patients with FUHs...
November 10, 2016: Catheterization and Cardiovascular Interventions
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