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Mechanical valve obstruction

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https://www.readbyqxmd.com/read/27847070/mitraclip-implantation-for-the-treatment-of-new-onset-systolic-anterior-motion-of-the-mitral-valve-after-transcatheter-aortic-valve-replacement
#1
Carmelo Grasso, Salvatore Scandura, Sergio Buccheri, Marco Barbanti, Maria Elena Di Salvo, Sarah Mangiafico, Giuseppe Ronsivalle, Sebastiano Immé, Claudia Tamburino, Martina Patané, Carmelo Sgroi, Davide Capodanno, Piera Capranzano, Corrado Tamburino
New-onset systolic anterior motion of the anterior mitral valve leaflet in patients undergoing transcatheter aortic valve replacement is a rare pathophysiologic mechanism leading to postprocedural development of mitral regurgitation and, eventually, left ventricular outflow obstruction. We report the first human case of successful MitraClip implantation to treat new-onset systolic anterior motion of the mitral valve after transcatheter aortic valve replacement causing severe obstruction to left ventricular outflow that was unresponsive to standard medical therapy...
December 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27815920/intestinal-hemorrhage-caused-by-meckel-s-diverticulum-with-ectopic-gastric-mucosa-on-polypoid-lesion-a-case-report
#2
Toshiyuki Irie, Seiichi Shinji, Hiroki Arai, Hayato Kan, Takeshi Yamada, Michihiro Koizumi, Yasuyuki Yokoyama, Goro Takahashi, Takuma Iwai, Mikihiro Okusa, Keiichiro Ohta, Eiji Uchida
Meckel's diverticulum may sometimes present as an intraluminal polypoid mass causing small bowel obstruction; however, gastrointestinal bleeding due to Meckel's diverticulum with a polypoid lesion is rare. A 14-year-old girl presented with tarry stool and syncope in our hospital. Laboratory examination showed iron-deficiency anemia with a low hemoglobin level of 5.8 g/dl. The bleeding site was detected by neither upper gastrointestinal endoscopy nor colonoscopy. Transanal double-balloon enteroscopy showed a diverticulum with an ulceration at a site approximately 50 cm from the ileocecal valve and a polypoid lesion inside of the diverticulum...
December 2016: Surgical Case Reports
https://www.readbyqxmd.com/read/27804157/echocardiographic-assessment-of-prosthetic-mitral-valves-in-children
#3
Taiyu Hayashi, Ryo Inuzuka, Hiroshi Ono, Hitoshi Kato
AIMS: We studied how Doppler-derived hemodynamic parameters in children change as the relative prosthetic mitral valve (PMV) size decreases with somatic growth and evaluated the diagnostic utility of the parameters for detecting PMV obstruction in children. METHODS AND RESULTS: We reviewed 26 echocardiographic examination results of 15 mechanical bileaflet PMVs in 12 children. The median age at echocardiographic examination was 6.6 (0.6-18.1) years. The PMV functioned normally in 24 examinations but was obstructed due to thrombosis in two cases...
November 2, 2016: Echocardiography
https://www.readbyqxmd.com/read/27768247/associations-between-maternal-water-consumption-and-birth-defects-in-the-national-birth-defects-prevention-study-2000-2005
#4
Breanna L Alman, Evan Coffman, Anna Maria Siega-Riz, Thomas J Luben
BACKGROUND: Water and water-based beverages constitute a major part of daily fluid intake for pregnant women, yet few epidemiologic studies have investigated the role of water consumption on birth outcomes. METHODS: We used data from the National Birth Defects Prevention Study to conduct a case-control study investigating associations between maternal water consumption during pregnancy and birth defects (BD). We used interview data on water consumption during the first trimester of pregnancy in 14,454 cases (major BDs n ≥ 50) and 5,063 controls...
October 21, 2016: Birth Defects Research. Part A, Clinical and Molecular Teratology
https://www.readbyqxmd.com/read/27760527/outcome-of-cardiac-surgery-in-patients-with-low-preoperative-ejection-fraction
#5
Marina Pieri, Alessandro Belletti, Fabrizio Monaco, Antonio Pisano, Mario Musu, Veronica Dalessandro, Giacomo Monti, Gabriele Finco, Alberto Zangrillo, Giovanni Landoni
BACKGROUND: In patients undergoing cardiac surgery, a reduced preoperative left ventricular ejection fraction (LVEF) is common and is associated with a worse outcome. Available outcome data for these patients address specific surgical procedures, mainly coronary artery bypass graft (CABG). Aim of our study was to investigate perioperative outcome of surgery on patients with low pre-operative LVEF undergoing a broad range of cardiac surgical procedures. METHODS: Data from patients with pre-operative LVEF ≤40 % undergoing cardiac surgery at a university hospital were reviewed and analyzed...
October 18, 2016: BMC Anesthesiology
https://www.readbyqxmd.com/read/27722697/thermally-actuated-wax-valves-for-paper-fluidic-diagnostics
#6
Elizabeth A Phillips, Rui Shen, Siyu Zhao, Jacqueline C Linnes
The complexity of current paper-fluidic diagnostic devices is limited by their imperfect control of reagent incubation and delivery. Valves providing complete fluid obstruction and multiple actuation steps within a single paper-fluidic diagnostic would increase the range of diagnostic bioassays in these porous membranes. Here, we report the rapid fabrication of tunable wax-ink valves that are thermally actuated within porous membranes. Varying width bands of wax-ink were printed onto strips of nitrocellulose and cellulose membranes and characterized by their triggered obstruction and release of fluid wicking through the membranes...
October 18, 2016: Lab on a Chip
https://www.readbyqxmd.com/read/27659877/physiological-mechanisms-of-pulmonary-hypertension
#7
REVIEW
David H MacIver, Ismail Adeniran, Iain R MacIver, Alistair Revell, Henggui Zhang
Pulmonary hypertension is usually related to obstruction of pulmonary blood flow at the level of the pulmonary arteries (eg, pulmonary embolus), pulmonary arterioles (idiopathic pulmonary hypertension), pulmonary veins (pulmonary venoocclusive disease) or mitral valve (mitral stenosis and regurgitation). Pulmonary hypertension is also observed in heart failure due to left ventricle myocardial diseases regardless of the ejection fraction. Pulmonary hypertension is often regarded as a passive response to the obstruction to pulmonary flow...
October 2016: American Heart Journal
https://www.readbyqxmd.com/read/27576330/subacute-left-ventricular-outflow-tract-obstruction-after-transapical-closure-of-a-mitral-paravalvular-leak-in-the-region-of-the-aortomitral-curtain
#8
Sathish Chikkabyrappa, Doff B McElhinney, Muhamed Saric
We report a rare case of progressive left ventricular outflow tract (LVOT) obstruction after percutaneous device closure of a mechanical prosthetic mitral valve (MV) paravalvular leak (PVL) in the region of aortomitral curtain in a patient who also had small mechanical aortic valve prosthesis with patient-prosthesis mismatch.
November 2016: Echocardiography
https://www.readbyqxmd.com/read/27568118/the-functional-significance-of-paradoxical%C3%A2-low-gradient-aortic%C3%A2-valve%C3%A2-stenosis-hemodynamic-findings-during-cardiopulmonary-exercise%C3%A2-testing
#9
Candelas Pérez Del Villar, Raquel Yotti, María Ángeles Espinosa, Enrique Gutiérrez-Ibañes, Alicia Barrio, María José Lorenzo, Pedro Luis Sánchez Fernández, Yolanda Benito, Raquel Prieto, Esther Pérez David, Pablo Martínez-Legazpi, Francisco Fernández-Avilés, Javier Bermejo
OBJECTIVES: The goal of this study was to determine the functional impact of paradoxical low-gradient aortic stenosis (PLGAS) and clarify whether the relevance of the valvular obstruction is related to baseline flow. BACKGROUND: Establishing the significance of PLGAS is particularly challenging. METHODS: Twenty symptomatic patients (77 ± 6 years of age; 17 female subjects) with PLGAS (mean gradient 28 ± 6 mm Hg; aortic valve area 0.8 ± 0...
August 20, 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27543649/endoscopic-atrioventricular-valve-surgery-in-adults-with-difficult-to-access-uncorrected-congenital-chest-wall-deformities
#10
Johan van der Merwe, Filip Casselman, Bernard Stockman, Yvette Vermeulen, Ivan Degrieck, Frank Van Praet
OBJECTIVES: This study presents the first report on in-hospital and long-term outcomes of endoscopic port access atrioventricular valve surgery (EPAAVVS) in adult patients with uncorrected congenital chest wall deformities (CCWDs). METHODS: Our current surgical team performed EPAAVVS in 7 consecutive adult patients (mean age 51.3 ± 16.4 years, 14.3% female, 50% older than 60 years, mean EuroSCORE II 0.8 ± 0.1%) with uncorrected CCWDs between 1 November 2009 and 30 November 2015...
August 19, 2016: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/27499619/the-differential-effects-of-inspiratory-expiratory-and-combined-resistive-breathing-on-healthy-lung
#11
Konstantinos Loverdos, Dimitrios Toumpanakis, Eleni Litsiou, Vassiliki Karavana, Constantinos Glynos, Christina Magkou, Stamatios Theocharis, Theodoros Vassilakopoulos
Combined resistive breathing (CRB) is the hallmark of obstructive airway disease pathophysiology. We have previously shown that severe inspiratory resistive breathing (IRB) induces acute lung injury in healthy rats. The role of expiratory resistance is unknown. The possibility of a load-dependent type of resistive breathing-induced lung injury also remains elusive. Our aim was to investigate the differential effects of IRB, expiratory resistive breathing (ERB), and CRB on healthy rat lung and establish the lowest loads required to induce injury...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27497941/bowel-obstruction-and-perforation-due-to-a-large-gallstone-a-case-report
#12
Georgios Sahsamanis, Konstantinos Maltezos, Panagiotis Dimas, Alexandros Tassos, Christos Mouchasiris
INTRODUCTION: Gallstone bowel obstruction is a rare form of mechanical ileus usually presenting in elderly patients, and is associated with chronic or acute cholecystitis episodes. CASE PRESENTATION: We present the case of an 80year old female with abdominal pain, inability to defecate and recurrent episodes of diarrhea for the past 8 months. CT examination uncovered a cholecystoduodenal fistula along with gas in the gall bladder and the presence of a ≥2cm gallstone inside the small bowel lumen causing obstruction...
2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27488753/ab0-blood-types-impact-on-development-of-prosthetic-mechanical-valve-thrombosis
#13
Mehmet Ali Astarcıoğlu, Macit Kalçık, Mahmut Yesin, Mustafa Ozan Gürsoy, Taner Şen, Süleyman Karakoyun, Sabahattin Gündüz, Mehmet Özkan
OBJECTIVE: The non-O alleles of the ABO genotype have been associated with an increased risk of thrombosis. We aimed to assess the association between blood group status and prosthetic valve thrombosis. METHODS: The association between AB0 blood group status and prosthetic valve thrombosis was assessed in this retrospective study. Transesophageal echocardiography was performed in 149 patients with a diagnosis of prosthetic valve thrombosis and in 192 control subjects...
July 21, 2016: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/27448416/obstructive-sleep-apnea-increases-the-perioperative-risk-of-cardiac-valve-replacement-surgery-a-prospective-single-center-study
#14
Ning Ding, Bu-Qing Ni, Hong Wang, Wen-Xiao Ding, Rong Xue, Wei Lin, Zhang Kai, Shi-Jiang Zhang, Xi-Long Zhang
STUDY OBJECTIVES: Sleep apnea is common in patients referred for cardiac valve replacement (CVR). We aimed to determine the association of obstructive sleep apnea (OSA) and central sleep apnea (CSA) with perioperative events in CVR surgery in patients with rheumatic valvular heart disease (RVHD). METHODS: Between April 2010 and April 2014, 290 patients with RVHD undergoing CVR were screened for sleep apnea 1 to 7 days before CVR. Baseline medications, cardiac function, sleep parameters, perioperative events, and related risk factors were evaluated...
October 15, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/27411403/myocardial-energy-depletion-and-dynamic-systolic-dysfunction-in-hypertrophic-cardiomyopathy
#15
Julian O M Ormerod, Michael P Frenneaux, Mark V Sherrid
Evidence indicates that anatomical and physiological phenotypes of hypertrophic cardiomyopathy (HCM) stem from genetically mediated, inefficient cardiomyocyte energy utilization, and subsequent cellular energy depletion. However, HCM often presents clinically with normal left ventricular (LV) systolic function or hyperkinesia. If energy inefficiency is a feature of HCM, why is it not manifest as resting LV systolic dysfunction? In this Perspectives article, we focus on an idiosyncratic form of reversible systolic dysfunction provoked by LV obstruction that we have previously termed the 'lobster claw abnormality' - a mid-systolic drop in LV Doppler ejection velocities...
November 2016: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/27367589/a-comparison-of-over-the-counter-mechanical-nasal-dilators-a-systematic-review
#16
Nicole Kiyohara, Christopher Badger, Tjoson Tjoa, Brian Wong
IMPORTANCE: The internal nasal valve is the narrowest part of the nasal airway and a common site of inspiratory collapse and obstruction of nasal airflow. Over-the-counter mechanical nasal dilators are an alternative to surgical intervention that attempts to improve airflow through the internal nasal valve. OBJECTIVE: To determine the efficacy of over-the-counter mechanical nasal dilators and classify these products by mechanism. EVIDENCE REVIEW: A database of 33 available over-the-counter mechanical nasal dilators was generated via a PubMed search as well as an internet search via Amazon...
September 1, 2016: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/27312787/composite-valve-graft-implantation-for-the-treatment-of-aortic-valve-and-root-disease-results-in-1045-patients
#17
Luca Di Marco, Davide Pacini, Antonio Pantaleo, Alessandro Leone, Giuseppe Barberio, Giuseppe Marinelli, Roberto Di Bartolomeo
OBJECTIVES: Aortic root replacement using a composite graft is the treatment of choice for a large variety of aortic root conditions with a diseased aortic valve. The objective of the current study was to evaluate the long-term results of this procedure. METHODS: Between 1978 and 2010, 1045 patients aged 58.7 ± 13.6 years underwent aortic root composite graft replacement using the following techniques: 95 Bentall operation; 926 the "button technique;" 24 the Cabrol technique...
October 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27300677/recurrent-chronic-obstructive-pulmonary-disease-exacerbations-after-endobronchial-valve-implantation-are-associated-with-the-presence-of-pseudomonas-aeruginosa
#18
Izabela Tuleta, Carmen Pizarro, Ernst Molitor, Glen Kristiansen, Georg Nickenig, Dirk Skowasch
BACKGROUND: Endoscopic lung volume reduction by means of endobronchial valve implantation is an established therapy in patients with severe emphysema. However, long-term complications such as chronic obstructive pulmonary disease (COPD) exacerbations are a limitation of this method. OBJECTIVES: As the mechanisms underlying increased rates of COPD exacerbations are unknown, the aim of our study was to determine whether infectious or inflammatory factors may contribute to these events and to investingate the consequent need for valve explantation...
2016: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/27273567/steroid-therapy-and-conduction-disturbances-after-transcatheter-aortic-valve-implantation
#19
Ofer Havakuk, Maayan Konigstein, Eyal Ben Assa, Yaron Arbel, Yigal Abramowitz, Amir Halkin, Samuel Bazan, Haim Shmilovich, Gad Keren, Ariel Finkelstein, Shmuel Banai
BACKGROUND: Direct mechanical compression of the frame struts on the adjacent bundle branch with local inflammatory reaction might cause conduction system disturbances and need for pacemaker implantation following transcatheter aortic valve implantation (TAVI). We assessed the impact of preprocedural anti-inflammatory steroid therapy on the occurrence of conduction disturbances following TAVI. METHODS AND RESULTS: From a cohort of 324 patients who underwent transfemoral TAVI, 39 (12%) were pretreated with steroids because of iodine allergy (n=29) or active obstructive pulmonary disease (n=10)...
October 2016: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/27271363/differential-activation-of-afferent-neuronal-and-inflammatory-pathways-during-small-bowel-obstruction-sbo
#20
M H Mueller, X Zhao, T Macheroux, M S Kasparek, H Seeliger, M E Kreis
BACKGROUND: Small bowel obstruction (SBO) is a potentially life-threatening condition which may be caused by a variety of pathologies such as postoperative adhesions or malignant diseases. Little is known on alterations in gut physiology during SBO, although its comprehension is essential to improve treatment which may help to prevent subsequent organ failure prior to surgical resolution. We aimed to investigate afferent nerve sensitivity and intestinal inflammatory response during SBO to identify possible targets of treatment...
October 2016: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
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