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Mechanical valve obstruction

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https://www.readbyqxmd.com/read/28315298/pneumosinus-dilatans-over-100%C3%A2-years-without-an-etiology
#1
Joseph A Ricci
PURPOSE: Pneumosinus dilatans (PD) is a rare pathologic hyperaeration of the paranasal sinuses that causes serious deformation of the overlying bone and soft tissue. The condition occurs most commonly in the frontal sinus of young men who present with different complaints, including cosmetic. More than 100 cases have been reported in the literature since it was first described in 1898; however, the etiology of this condition remains unclear. MATERIALS AND METHODS: A systematic review of all available clinical publications on the subject of PD was conducted in the PubMed electronic database...
February 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28290177/left-ventricular-outflow-tract-obstruction-and-systolic-anterior-motion-of-the-mitral-valve-in-the-absence-of-hypertrophic-cardiomyopathy
#2
Natasha Aleksova, Alice Wang, Christopher A Glover, Thierry Mesana, Girish Dwivedi
Systolic anterior motion of the mitral valve is a mechanism for the development of left ventricular outflow tract (LVOT) obstruction. While often associated with left ventricular hypertrophy (LVH), a case is reported of symptomatic LVOT obstruction due to intrinsic mitral valve pathology in the absence of hypertrophy or cardiomyopathy. This case highlights the importance of recognizing isolated mitral valve pathology as a treatable cause of LVOT obstruction.
November 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28277270/-heart-failure-provoked-by-a-pacemaker-lead-induced-tricuspid-stenosis
#3
E Chaudesaygues, M Ferrini, B Ritz
Tricuspid stenosis (TS) is an uncommon complication of ventricular pacemaker implantation. Mechanisms described by the literature are ventricular inflow obstruction by tricuspid vegetations (endocarditis) or multiple pacemaker leads and fibrosis secondary to mechanical trauma, accounting for perforation or laceration of the TV leaflets, or adherence between redundant loops and valve tissue. We present the case of iatrogenic tricuspid stenosis, observed in a 77-year-old man. Extrinsic tricuspid valve stenosis was detected by transthoracic echocardiography...
October 26, 2016: Annales de Cardiologie et D'angéiologie
https://www.readbyqxmd.com/read/28267085/hemolytic-anemia-due-to-right-ventricular-to-pulmonary-artery-conduit-stenosis
#4
Sudha Rao, Julie A Creaden, Shunyou Gong, Cynthia Rigsby, John M Costello
Hemolytic anemia is a well-recognized complication in patients with left-sided mechanical heart valves. It is rare to see hemolysis with a bioprosthetic valve in the right ventricular outflow tract. We report a 4-year-old-girl with history of truncus arteriosus status-post repair who developed hemolytic anemia as a result of a calcified and obstructed bioprosthetic right ventricular to pulmonary artery-valved conduit. The hemolysis was alleviated by replacing the obstructed conduit with a larger valved conduit...
March 6, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28238247/dysfunction-of-an-on-x-heart-valve-by-pannus
#5
Cipriano Abad, Stefano Urso, Elsa Gomez, Maria De la Vega
A 68-year-old woman with a history of previous double-valve replacement with On-X mechanical heart valves presented with clinical, echocardiographic and cardiac catheterization signs of obstruction of the On-X tricuspid heart valve prosthesis. The patient was successfully reoperated, but at surgery the valve was seen to be invaded by an abnormal overgrowth of pannus that blocked one of the leaflets. A small amount of non-obstructive fresh thrombus was also observed. The valve was successfully replaced with a biological heart valve prosthesis...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28238243/improved-pig-model-to-evaluate-heart-valve-thrombosis
#6
Umashankar Payanam Ramachandra, Sachin J Shenoy, Sabareeswaran Arumugham
BACKGROUND AND AIM OF STUDY: Although the sheep is the most acceptable animal model for heart valve evaluation, it has severe limitations for detecting heart valve thrombosis during preclinical studies. While the pig offers an alternative model and is better for detecting prosthetic valve thrombogenicity, it is not often used because of inadvertent valve thrombosis or bleeding complications. The study aim was to develop an improved pig model which can be used reliably to evaluate mechanical heart valve thrombogenicity...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28238241/mitral-patient-prosthesis-mismatch-predicts-suboptimal-hemodynamic-recovery-after-mitral-valve-replacement
#7
Sertan Ozyalcin, Kerem M Vural, Ayse Colak
BACKGROUND: A possible relationship between an obstructive prosthesis and suboptimal hemodynamic recovery, as reflected by unsatisfactory regression in systolic pulmonary artery pressure (sPAP) and functional tricuspid regurgitation (FTR) following mitral valve replacement (MVR), was investigated. A delineating effective orifice area index (EOAI) value was sought in order to define a patient-prosthesis mismatch. METHODS: A total of 128 patients undergoing isolated mechanical MVR were followed up for a mean of 46 ± 9 months...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28221172/interventional-pulmonology-in-chronic-obstructive-pulmonary-disease
#8
Daniela Gompelmann, Nilab Sarmand, Felix J F Herth
PURPOSE OF REVIEW: Chronic obstructive pulmonary disease (COPD) and emphysema are widespread diseases associated with progressive dyspnea because of airflow limitation and hyperinflation. Fundamental therapeutic strategies consist of pulmonary rehabilitation, pharmacotherapy, long-term oxygen therapy, noninvasive ventilation, and surgical therapeutic approaches. RECENT FINDINGS: In the last 14 years, endoscopic therapeutic modalities emerged as a substantial part of severe COPD and emphysema treatment...
February 17, 2017: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/28209176/infective-endocarditis-causing-mitral-valve-stenosis-a-rare-but-deadly-complication-a-case-report
#9
Michael A Hart, Gautam R Shroff
BACKGROUND: Infective endocarditis rarely causes mitral valve stenosis. When present, it has the potential to cause severe hemodynamic decompensation and death. There are only 15 reported cases in the literature of mitral prosthetic valve bacterial endocarditis causing stenosis by obstruction. This case is even more unusual due to the mechanism by which functional mitral stenosis occurred. CASE PRESENTATION: We report a case of a 23-year-old white woman with a history of intravenous drug abuse who presented with acute heart failure...
February 17, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28144067/stenting-of-critical-tracheal-stenosis-with-adjuvant-cardio-pulmonary-bypass
#10
Himanshu Bhardwaj, Ahmed Awab, Houssein A Youness, Brent Brown
Severe and critical central airway obstruction causing impaired ventilation and/or oxygenation can impose tremendous challenges on the interventional pulmonologist. Near total airway obstruction can rapidly evolve into potentially fatal complete airway occlusion during bronchoscopic airway manipulation under moderate sedation; as well as during the induction of the general anesthesia. Although there are currently interventional pulmonary procedures available to tackle the critical airway obstruction in extreme situations, cardio-pulmonary bypass should be considered prior to the intervention to maintain the adequate gas exchange during the procedure...
January 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28012497/giant-bulla-formation-in-the-lung-because-of-a-check-valve-mechanism
#11
Aya Hirata, Takeshi Saraya, Nobuaki Arai, Shin Karita, Riken Kawachi, Hidefumi Takei, Kosuke Ohkuma, Manabu Ishida, Masachika Fujiwara, Hajime Takizawa
The pathogenesis of bulla formation has not yet been demonstrated in pathologic examinations or through direct visualization during thoracotomy or thoracoscopic surgery. We present two cases of giant bulla formation after pneumothorax because of cryptogenic organizing pneumonia and lung abscess. The case findings suggested that the pathogenesis was attributable to a check-valve mechanism, secondary to bronchiolitis obliterans, or the presence of an obstructing air leakage due to a lung fistula. The lung fistula had been covered by inflammatory membranes consisting of blood and/or fibrous precipitates with detached visceral pleura...
January 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/27993741/spinal-intradural-arachnoid-webs-causing-spinal-cord-compression-with-inconclusive-preoperative-imaging-a-report-of-3-cases-and-a-review-of-the-literature
#12
Dafang Zhang, Efstathios Papavassiliou
OBJECTIVE: Spinal arachnoid webs are a rare variant of spinal arachnoid cysts where 1 or multiple focal membranes of arachnoid tissue obstruct the subarachnoid space. Only 11 prior cases of arachnoid webs have been reported in the literature. We present a series of 3 consecutive cases of arachnoid webs from our institution and review the literature on this rare condition to provide recommendations for its management. METHODS: Retrospective chart review was performed for 3 consecutive cases of intradural arachnoid webs causing spinal cord compression at our institution, with inconclusive preoperative imaging, treatment with surgical decompression, and resection...
March 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27992862/endobronchial-valves-for-endoscopic-lung-volume-reduction-best-practice-recommendations-from-expert-panel-on-endoscopic-lung-volume-reduction
#13
Dirk-Jan Slebos, Pallav L Shah, Felix J F Herth, Arschang Valipour
Endoscopic lung volume reduction (ELVR) is being adopted as a treatment option for carefully selected patients suffering from severe emphysema. ELVR with the one-way endobronchial Zephyr valves (EBV) has been demonstrated to improve pulmonary function, exercise capacity, and quality of life in patients with both heterogeneous and homogenous emphysema without collateral ventilation. In this "expert best practices" review, we will highlight the practical aspects of this therapy. Key selection criteria for ELVR are hyperinflation with a residual volume >175% of predicted, forced expiratory volume <50% of predicted, and a 6-min walking distance >100 m...
2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/27956913/myxoma-immediately-above-the-junction-of-the-inferior-vena-cava-and-the-right-atrium-a-rare-cause-of-budd-chiari-syndrome
#14
Vahid Mohammad Karimi, Amir Anushiravani, Mohammad Hossein Dabbaghmanesh, Massood Hosseinzadeh, Ali Reza Rasekhi, Mahmoud Zamirian, Amir Anushiravani
The Budd-Chiari syndrome (BCS) is a rare disorder caused by the obstruction of the hepatic veins or the inferior vena cava (IVC) at the suprahepatic level. This syndrome is developed by either hepatic vein thrombosis or mechanical venous obstruction and leads to centrilobular hepatic congestion with the subsequent development of fibrosis and cirrhosis. Intracardiac tumors have been rarely reported as a cause of the BCS. These tumors usually originate from the atrial septum. Very rarely, they arise either from the junction of the IVC and the right atrium or from the Eustachian valve...
July 6, 2016: Journal of Tehran Heart Center
https://www.readbyqxmd.com/read/27928260/emergency-redo-mitral-valve-replacement-immediately-after-caesarean-section
#15
İbrahim Duvan, Ümit Pınar Sungur, Burak Emre Onuk, Mehmet Şanser Ateş, İbrahim Sami Karacan, Murat Kurtoğlu
Surgery for heart diseases during pregnancy, especially necessitating cardiopulmonary bypass, is believed to trigger maternal and fetal risks and should be performed only when medical therapy has been unsuccessful to alleviate the cardiac decompensation. A 33-year-old pregnant woman in her 33rd week of gestation was admitted to our hospital. She had rheumatic mitral valvular stenosis and had undergone mitral valve replacement (MVR) with a mechanical prosthesis 11 years earlier in another center. Echocardiography revealed a thrombotic mass obstructing the leaflets of the mechanical mitral valve...
April 13, 2016: Journal of Tehran Heart Center
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
#16
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
#17
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
#18
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...
January 2017: Echocardiography
https://www.readbyqxmd.com/read/27768247/associations-between-maternal-water-consumption-and-birth-defects-in-the-national-birth-defects-prevention-study-2000-2005
#19
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
#20
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
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