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echocardiography + stroke

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https://www.readbyqxmd.com/read/28931524/degree-of-anemia-indirect-markers-of-hemolysis-and-vascular-complications-of-sickle-cell-disease-in-africa
#1
Marie Dubert, Jacques Elion, Aissata Tolo, Dapa Aly Diallo, Saliou Diop, Ibrahima Diagne, Ibrahima Sanogo, Suzanne Belinga, Odette Guifo, Guillaume Wamba, Françoise Ngo Sack, Kouakou Boidy, Ismael Kamara, Youssouf Traore, Cheick Oumar Diakite, Valérie Gbonon, Blaise Felix Faye, Moussa Seck, Indou Deme Ly, David Chelo, Roland N'Guetta, Ibrahima Bara Diop, Bamba Gaye, Xavier Jouven, Brigitte Ranque
The hyperhemolysis paradigm that describes overlapping "hyperhemolytic-endothelial dysfunction" and "high hemoglobin-hyperviscous" subphenotypes of sickle cell disease (SCD) patients is based on North American studies. We performed a transversal study nested in the CADRE cohort to analyze the association between steady-state hemolysis and vascular complications of SCD among sub-Saharan African patients. In Mali, Cameroon, and Ivory Coast, 2,407 SCD patients (1,751 SS-Sβ(0), 495 SC and 161 Sβ(+)), aged three years old and over, were included at steady-state...
September 20, 2017: Blood
https://www.readbyqxmd.com/read/28919891/moderate-intensity-exercise-affects-gut-microbiome-composition-and-influences-cardiac-function-in-myocardial-infarction-mice
#2
Zuheng Liu, Hai-Yue Liu, Haobin Zhou, Qiong Zhan, Wenyan Lai, Qingchun Zeng, Hao Ren, Dingli Xu
Physical exercise is commonly regarded as protective against cardiovascular disease (CVD). Recent studies have reported that exercise alters the gut microbiota and that modification of the gut microbiota can influence cardiac function. Here, we focused on the relationships among exercise, the gut microbiota and cardiac function after myocardial infarction (MI). Four-week-old C57BL/6J mice were exercised on a treadmill for 4 weeks before undergoing left coronary artery ligation. Cardiac function was assessed using echocardiography...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28915226/pulmonary-vascular-function-and-aerobic-exercise-capacity-at-moderate-altitude
#3
Vitalie Faoro, Gael Deboeck, Marco Vicenzi, Anne-Fleur Gaston, Bamodi Simaga, Grégory Doucende, Ilona Hapkova, Emma Roca, Enric Subirats, Fabienne Durand, Robert Naeije
PURPOSE: There has been suggestion that a greater "pulmonary vascular reserve" defined by a low pulmonary vascular resistance (PVR) and a high lung diffusing capacity (DL) allow for a superior aerobic exercise capacity. How pulmonary vascular reserve might affect exercise capacity at moderate altitude is not known. METHODS: Thirty-eight healthy subjects underwent an exercise stress echocardiography of the pulmonary circulation, combined with measurements of DL for nitric oxide (NO) and carbon monoxide (CO) and a cardiopulmonary exercise test at sea level and at an altitude of 2250 m...
October 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28912359/left-ventricular-strain-rate-is-reduced-during-voluntary-apnea-in-healthy-humans
#4
Joshua R Smith, Shelbi L Sutterfield, Dryden R Baumfalk, Kaylin D Didier, Shane M Hammer, Jacob Troy Caldwell, Carl J Ade
During an apneic event, sympathetic nerve activity increases resulting in subsequent increases in left ventricular afterload and myocardial work. It is unknown how cardiac mechanics are acutely impacted by the increased myocardial work during an apneic event. 10 healthy individuals (23 ± 3 yrs) performed multiple voluntary end-expiratory apnea (VEEA) maneuvers exposed to room air, while a subset (n=7) completed multiple VEEA exposed to hyperoxic air (100% FiO2). Beat-by-beat blood pressure, heart rate and stroke volume were measured continuously...
September 14, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28893516/interleukin-6-is-independently-associated-with-right-ventricular-function-in-pulmonary-arterial-hypertension
#5
Kurt W Prins, Stephen L Archer, Marc Pritzker, Lauren Rose, E Kenneth Weir, Alok Sharma, Thenappan Thenappan
BACKGROUND: An elevated serum level of interleukin-6 (IL-6) in pulmonary arterial hypertension (PAH) patients results in a greater symptom burden and increased mortality; however, the mechanisms underlying these observations remain unclear. Because both pre-clinical and clinical data associate elevated IL-6 levels with impaired cardiac function, we hypothesized that the adverse effects of IL-6 in PAH result, in part, from right ventricular (RV) dysfunction. METHODS: We analyzed the relationship between IL-6 and RV function in 40 patients with PAH identified in our institutional PAH registry...
September 1, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28893396/early-results-of-robotically-assisted-mitral-valve-surgery-analysis-of-the-first-1000-cases
#6
A Marc Gillinov, Tomislav Mihaljevic, Hoda Javadikasgari, Rakesh M Suri, Stephanie L Mick, José L Navia, Milind Y Desai, Johannes Bonatti, Mitra Khosravi, Jay J Idrees, Ashley M Lowry, Eugene H Blackstone, Lars G Svensson
OBJECTIVE: The study objective was to assess the technical and process improvement and clinical outcomes of robotic mitral valve surgery by examining the first 1000 cases performed in a tertiary care center. METHODS: We reviewed the first 1000 patients (mean age, 56 ± 10 years) undergoing robotic primary mitral valve surgery, including concomitant procedures (n = 185), from January 2006 to November 2013. Mitral valve disease cause was degenerative (n = 960, 96%), endocarditis (n = 26, 2...
August 1, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28892213/evaluation-of-longitudinal-and-radial-left-ventricular-functions-using-two-and-three-dimensional-echocardiography-before-and-after-intravenous-immunoglobulin-administration-in-patients-with-acute-kawasaki-disease
#7
Ikuo Hashimoto, Yu Saitou, Nao Sakata, Ko Shibata
BACKGROUND: The relationship between left ventricular (LV) function and longitudinal or radial contraction has not yet been elucidated in patients with acute Kawasaki disease (KD), especially before and after intravenous immunoglobulin (IVIG) administration. METHODS: We studied 28 KD patients without coronary aneurysms (average 3.2 years). The LV end-diastolic volume (LVEDV), end-systolic volume (LVESV), stroke volume (LVSV), and ejection fraction (LVEF) were assessed using three-dimensional echocardiography before IVIG, after IVIG administration, and in the convalescent phase...
September 11, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28886841/identification-and-quantification-of-patent-foramen-ovale-mediated-shunts-echocardiography-and-transcranial-doppler
#8
REVIEW
Ahmed N Mahmoud, Islam Y Elgendy, Nayan Agarwal, Jonathan M Tobis, Mohammad Khalid Mojadidi
Once deemed benign, patent foramen ovale (PFO)-mediated right-to-left shunting has now been linked to stroke, migraine, and hypoxemia. Contrast transesophageal echocardiography is considered the standard technique for identifying a PFO, allowing visualization of the atrial septal anatomy and differentiation from non-PFO right-to-left shunts. Transthoracic echocardiography is the most common method for PFO imaging, being cost-effective, but has the lowest sensitivity. Transcranial Doppler is highly sensitive but is unable to differentiate cardiac from pulmonary shunts; it is the best method to quantitate shunt severity, being more sensitive than transthoracic or transesophageal echocardiography so is our preferred screening method for PFO...
October 2017: Interventional cardiology clinics
https://www.readbyqxmd.com/read/28885101/association-between-the-maximal-distance-of-atrial-septal-protrusion-and-cryptogenic-stroke
#9
Keisuke Tokunaga, Masahiro Yasaka, Takahiro Kuwashiro, Seiji Gotoh, Asako Nakamura, Go Takaguchi, Tetsuro Ago, Masahiro Kamouchi, Takanari Kitazono, Yasushi Okada
Background and purpose Previous studies have suggested that atrial septal aneurysm is a potential risk factor for cerebral embolism. However, the association between the level of atrial septal protrusion and cerebral embolism is still unclear. The purpose of the present study was to assess the association between the maximal distance of atrial septal protrusion and cryptogenic stroke. Methods A total of 588 consecutive acute ischemic stroke patients (70 ± 11 (mean ± SD) years, 401 men) who underwent transesophageal echocardiography were enrolled...
December 20, 2016: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28879411/serial-changes-in-anatomy-and-ventricular-function-on-dual-source-cardiac-computed-tomography-after-the-norwood-procedure-for-hypoplastic-left-heart-syndrome
#10
Hyun Woo Goo
BACKGROUND: Accurate evaluation of anatomy and ventricular function after the Norwood procedure in hypoplastic left heart syndrome is important for treatment planning and prognostication, but echocardiography and cardiac MRI have limitations. OBJECTIVE: To assess serial changes in anatomy and ventricular function on dual-source cardiac CT after the Norwood procedure for hypoplastic left heart syndrome. MATERIALS AND METHODS: In 14 consecutive patients with hypoplastic left heart syndrome, end-systolic and end-diastolic phase cardiac dual-source CT was performed before and early (average: 1 month) after the Norwood procedure, and repeated late (median: 4...
September 6, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28872450/the-association-between-aortic-regurgitation-and-undetermined-embolic-infarction-with-aortic-complex-plaque
#11
Dae-Won Kim, Jung Sun Cho, Jae Yeong Cho, Kye Hun Kim, Byung Joo Sun, Jae-Hyeong Park
Background Retrograde embolism from the descending thoracic aorta is one possible cause of undetermined ischemic stroke. Significant aortic regurgitation can increase the amount of reversed flow in the thoracic aorta and thus is associated with an increased incidence of stroke. Aims This study aimed to examine the association between significant aortic regurgitation and undetermined embolic infarction with aortic complex plaques. Methods This study included 380 patients with undetermined embolic stroke who did not have abnormal flow such as atrial septal defect, patent foramen ovale determined by agitated saline bubble test, intracardiac thrombi on transesophageal echocardiography, atrial fibrillation, or small vessel stroke, cerebral artery, and carotid stenosis on the brain magnetic resonance imaging...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28867024/impact-of-stroke-volume-assessment-by-integrating-multi-detector-computed-tomography-and-doppler-data-on-the-classification-of-aortic-stenosis
#12
Barbara E Stähli, Thomas Stadler, Erik W Holy, Thi Dan Linh Nguyen-Kim, Lisa Hoffelner, Ladina Erhart, Slayman Obeid, Markus Niemann, Rolf Jenni, Sandra Hamada, Robert Manka, Thomas F Lüscher, Francesco Maisano, Fabian Nietlispach, Thomas Frauenfelder, Felix C Tanner
BACKGROUND: The prevalence of low flow low gradient (LFLG) severe aortic stenosis (AS) may be overrated due to underestimation of stroke volume in two-dimensional (2D) echocardiography. The implications of 3D imaging on stroke volume calculation for AS classification have not been elucidated. Integrating multi-detector computed tomography (MDCT) and Doppler data may improve diagnostic accuracy in patients with LFLG AS. METHODS: A total of 186 patients with severe AS evaluated for transcatheter aortic valve replacement were classified according to indexed stroke volume (SVI, cut-off 35mL/m(2)) and mean transaortic pressure gradient (cut-off 40mmHg)...
November 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28866972/comparison-of-continous-wave-doppler-ultrasound-monitor-and-echocardiography-to-assess-cardiac-output-in-intensive-care-patients
#13
Ahmad Elgendy, Ian M Seppelt, Andrew S Lane
BACKGROUND: Continuous-wave Doppler (CWD) ultrasound through the left ventricular outflow tract is one modality used for non-invasive cardiac output measurement. The ultrasonic cardiac output monitor (USCOM) is a relatively new monitor which uses a small, transcutaneous ultrasound probe to measure cardiac output with CWD via the suprasternal window. It is faster and less complex to train new users than conventional echocardiography. In addition to stroke volume (SV), the USCOM can calculate stroke volume variation (SVV) and the Smith-Madigan inotropy index (SMII), which is an estimate of the pre-load independent contractility of the myocardium...
September 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28864319/evaluation-of-imaging-strategy-to-optimize-and-improve-outcome-of-transcatheter-aortic-valvular-implantation
#14
Charlotte Casset, Adrien Jankowski, Bernard Bertrand, Carole Saunier, Nicolas Piliero, Mathieu Rodiere, Gilbert Ferretti, Jean-Louis Quesada, Alexis Broisat, Laurent Riou, Daniel Fagret, Catherine Ghezzi, Gérald Vanzetto, Gilles Barone-Rochette
Cardiac computed tomography (CT) provides additional information with ultrasound in the transcatheter heart valve (THV) size selection. However, the influence of these incremental data on outcomes has not been evaluated in a randomized study. A single-center prospective, randomized, and open study was performed. Patients referred for transfemoral transcatheter aortic valve implantation with a balloon-expandable endoprothesis were included. THV size selection was performed using either transthoracic and transesophageal echocardiography data (control group) or ultrasound and CT results (CT group)...
July 31, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28846524/outcome-of-patients-with-low-flow-low-gradient-severe-aortic-stenosis-who-underwent-aortic-valve-replacement
#15
Xing Li Fan, Jiajun Zhang, Chong Wang, Hongmei Chong, Guanxin Zhang, Qing Xue, Yangfeng Tang, Lin Han
It is well-documented that stroke volume and gradient are indexed to classify patients with aortic stenosis into several phenotypes. The purpose of the present study was to estimate the impact of stroke volume and gradient on the clinical outcome of patients with AS who have undergone aortic valve replacement. Methods: A total of 154 consecutive patients were studied. They all had severe aortic stenosis (aortic valve area [AVA] ≤ 1 cm², left ventricular ejection fraction [LVEF] ≥ 50%) and underwent aortic valve replacement (AVR) from January 1, 2004 to December 31, 2010...
July 20, 2017: Heart Surgery Forum
https://www.readbyqxmd.com/read/28836342/single-trans-septal-access-technique-for-left-atrial-intracardiac-echocardiography-to-guide-left-atrial-appendage-closure
#16
Daniel Aguirre, Christian Pincetti, Luis Perez, Carlos Deck, Mario Alfaro, Maria Jesus Vergara, Gabriel Maluenda
OBJECTIVE: This registry aimed to describe the safety and feasibility of a single trans-septal (TS) access technique for left intracardiac echocardiography (ICE) guidance of left-atrial appendage (LAA) closure procedure. BACKGROUND: LAA closure is currently accepted as an alternative to oral anticoagulation (OAC) in patients with non-valvular atrial fibrillation (NVAF) who are at high-risk for bleeding. Currently, LAA closure procedure is typically performed under trans-esophageal echocardiogram (TEE) guidance...
August 24, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28827669/cerebral-blood-volume-and-oxygen-supply-uniformly-increase-following-various-intrathoracic-pressure-strains
#17
Zhongxing Zhang, Nina Bolz, Marco Laures, Margit Oremek, Christoph Schmidt, Ming Qi, Ramin Khatami
Intrathoracic pressure (ITP) swings challenge many physiological systems. The responses of cerebral hemodynamics to different ITP swings are still less well-known due to the complexity of cerebral circulation and methodological limitation. Using frequency-domain near-infrared spectroscopy and echocardiography, we measured changes in cerebral, muscular and cardiac hemodynamics in five graded respiratory maneuvers (RM), breath holding, moderate and strong Valsalva maneuvers (mVM/sVM) with 20 and 40 cmH2O increments in ITP, moderate and strong Mueller maneuvers (mMM/sMM) with 20 and 40 cmH2O decrements in ITP controlled by esophageal manometry...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819953/impact-of-post-dilatation-on-the-reduction-of-paravalvular-leak-and-mortality-after-transcatheter-aortic-valve-implantation
#18
Paweł Kleczyński, Artur Dziewierz, Marzena Daniec, Maciej Bagieński, Łukasz Rzeszutko, Danuta Sorysz, Jarosław Trębacz, Robert Sobczyński, Marek Tomala, Dariusz Dudek
BACKGROUND: Post-implantation paravalvular leak (PVL) remains a significant complication of transcatheter aortic valve implantation (TAVI). More importantly, its occurrence may impact long-term mortality. AIM: We sought to evaluate the effects of balloon post-dilatation (PD) on the reduction of PVL and mortality in patients undergoing TAVI. METHODS: A total of 101 consecutive patients undergoing TAVI were enrolled. Angiography, echocardiography, and the aortic regurgitation index (ARI) were used to assess the severity of PVL before and after balloon PD...
2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28818863/detection-of-left-ventricular-thrombus-by-cardiac-magnetic-resonance-in-embolic-stroke-of-undetermined-source
#19
Junji Takasugi, Hiroshi Yamagami, Teruo Noguchi, Yoshiaki Morita, Tomotaka Tanaka, Yoshinori Okuno, Satoshi Yasuda, Kazunori Toyoda, Yasufumi Gon, Kenichi Todo, Manabu Sakaguchi, Kazuyuki Nagatsuka
BACKGROUND AND PURPOSE: We aimed to use contrast-enhanced cardiac magnetic resonance (CE-CMR) imaging to elucidate the prevalence of left ventricular (LV) thrombus in patients suspected of embolic stroke of undetermined source (ESUS) with previous myocardial infarction or LV dysfunction (LV ejection fraction [LVEF] <50%). METHODS: We prospectively investigated 797 consecutive patients who presented to our hospital with acute ischemic stroke between 2014 and 2015...
September 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28810087/multiple-pulmonary-arteriovenous-malformations-an-unusual-cause-of-shortness-of-breath-and-recurrent-strokes
#20
Kalyan C Potu, Shenjing Li, Shawn C Kelly, Julia A Prescott-Focht, Scott Pham
OBJECTIVE: To discuss an uncommon case of a patient with multiple pulmonary arteriovenous malformations (PAVMs) presenting with dyspnea on exertion and recurrent strokes. BACKGROUND: A 79-year-old woman with recent onset recurrent cerebrovascular accidents (CVAs) was referred to cardiology for evaluation of dyspnea on exertion. Clinical examination was unrevealing. METHODS: A transthoracic echocardiogram (TTE) with agitated saline was suggestive of an extra-cardiac shunt...
February 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
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