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Mechanical mitral

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https://www.readbyqxmd.com/read/29049550/mid-term-outcomes-of-congenital-mitral-valve-surgery-shone-s-syndrome-is-a-risk-factor-for-death-and-reintervention
#1
Koichi Sughimoto, Igor E Konstantinov, Yves d'Udekem, Johann Brink, Diana Zannino, Christian P Brizard
OBJECTIVES: To study the recent trends and outcomes of congenital mitral valve surgery in children. METHODS: From 2008 to 2014, 84 procedures in 66 consecutive patients (41 procedures in 31 patients with mitral stenosis and 43 procedures in 35 patients with mitral regurgitation) were retrospectively evaluated. The mean age at surgery was 4.3 ± 5.4 years, and 27 patients (41%) were neonates or infants. RESULTS: Seven (11%) patients died during the follow-up period of 3...
August 7, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29046338/regulation-of-valve-interstitial-cell-homeostasis-by-mechanical-deformation-implications-for-heart-valve-disease-and-surgical-repair
#2
Salma Ayoub, Chung-Hao Lee, Kathryn H Driesbaugh, Wanda Anselmo, Connor T Hughes, Giovanni Ferrari, Robert C Gorman, Joseph H Gorman, Michael S Sacks
Mechanical stress is one of the major aetiological factors underlying soft-tissue remodelling, especially for the mitral valve (MV). It has been hypothesized that altered MV tissue stress states lead to deviations from cellular homeostasis, resulting in subsequent cellular activation and extracellular matrix (ECM) remodelling. However, a quantitative link between alterations in the organ-level in vivo state and in vitro-based mechanobiology studies has yet to be made. We thus developed an integrated experimental-computational approach to elucidate MV tissue and interstitial cell responses to varying tissue strain levels...
October 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29042413/mitral-leaflet-changes-following-myocardial-infarction-clinical-evidence-for-maladaptive-valvular-remodeling
#3
Jonathan Beaudoin, Jacob P Dal-Bianco, Elena Aikawa, Joyce Bischoff, J Luis Guerrero, Suzanne Sullivan, Philipp Emanuel Bartko, Mark D Handschumacher, Dae-Hee Kim, Jill Wylie-Sears, Jacob Aaron, Robert A Levine
BACKGROUND: Ischemic mitral regurgitation (MR) is classically ascribed to functional restriction of normal leaflets, but recent studies have suggested post-myocardial infarction (MI) mitral valve (MV) leaflet fibrosis and thickening, challenging valve normality. Progression of leaflet thickness post-MI has not been studied. We hypothesized that excessive MV remodeling post-MI contributes to MR. Our objectives are to characterize MV changes after MI and relate them to MR. METHODS AND RESULTS: Three groups of 40 patients with serial echocardiograms over a mean of 23...
November 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29029949/mitral-valve-replacement-using-carpentier-edwards-pericardial-bioprosthesis-in-patients-with-rheumatic-heart-disease-aged-below-40-years-17-year-results
#4
Ujjwal Kumar Chowdhury, Adil Rizvi, Rajeev Narang, Sandeep Seth, Mani Kalaivani, Suruchi Hasija, Lakshmi Kumari
BACKGROUND: This study was designed to evaluate patients aged less than 40 years implanted with tissue heart valves with respect to survival, thromboembolism, structural degeneration and quality of life. METHODS: Between January, 2000 and December, 2016, 132 patients (51 males) with rheumatic heart disease underwent mitral valve replacement using Carpentier-Edwards, perimount, pericardial bioprostheses. The patients' ages ranged between 12 and 39 years (mean±SD 30...
August 1, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29029176/spontaneous-mechanical-rupture-of-a-papillary-muscle-effectively-resolved-by-mitral-valve-repair
#5
Antonio Fiore, Mariantonietta Piscitelli, Eric Bergoend, Jean Paul Couetil
We report a case of spontaneous mechanical papillary muscle rupture. In theory, the papillary muscle works as a shock absorber that compensates for geometric changes of left ventricular wall. We believe that the aetiology of papillary muscle rupture, in this case, is linked to the physical and mechanical strains exerted on the papillary. We performed a mitral valve repair with excellent short- and long-term results.
September 26, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29029030/outcomes-of-surgery-for-infective-endocarditis-a-single-centre-experience-of-801-patients
#6
Sameh M Said, Zaid M Abdelsattar, Hartzell V Schaff, Kevin L Greason, Richard C Daly, Alberto Pochettino, Lyle D Joyce, Joseph A Dearani
OBJECTIVES: Infective endocarditis (IE) remains a life-threatening disease, despite the improvement in diagnostic and therapeutic measures. We reviewed our outcomes for all adults who underwent surgery for endocarditis at our centre. METHODS: Between January 1995 and December 2013, 801 patients [586 men (73%)] underwent surgery for IE. Mean age was 60 ± 14.7 years. Native endocarditis (NE) was present in 372 patients (46%), and 379 (47%) patients had active IE...
October 3, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29027633/multi-modality-imaging-in-the-evaluation-and-treatment-of-mitral-regurgitation
#7
REVIEW
Marc-André Bouchard, Claudia Côté-Laroche, Jonathan Beaudoin
Mitral regurgitation (MR) is frequent and associated with increased mortality and morbidity when severe. It may be caused by intrinsic valvular disease (primary MR) or ventricular deformation (secondary MR). Imaging has a critical role to document the severity, mechanism, and impact of MR on heart function as selected patients with MR may benefit from surgery whereas other will not. In patients planned for a surgical intervention, imaging is also important to select candidates for mitral valve (MV) repair over replacement and to predict surgical success...
October 13, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29026892/prompt-diagnosis-of-st-elevation-myocardial-infarction-with-papillary-muscle-rupture-by-point-of-care-ultrasound-in-the-emergency-department
#8
Koon Ho Cheung, Colin Graham Alexander
A previously healthy 61-year-old man presented to the emergency department with chest pain and dyspnoea for 6 hours. Examination revealed distress with an apical pansystolic murmur. Initial electrocardiogram showed sinus tachycardia and ST elevation in leads II, III, and aVF compatible with an inferior ST-elevation myocardial infarction. Point-of-care echocardiography in the emergency department showed a flail anterior mitral leaflet and severe mitral regurgitation, leading to a provisional diagnosis of papillary muscle rupture...
September 2017: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/29023787/percutaneous-transapical-approach-and-transcatheter-closure-for-ventricular-tachycardia-ablation
#9
Veysel Kutay Vurgun, Ali Timucin Altin, Mustafa Kilickap, Basar Candemir, Omer Akyurek
In patients with mechanical aortic and mitral valve prosthesis, left ventricular (LV) endocardial ablation via retrograde transaortic or antegrade transmitral approach carry high risk of catheter entrapment and death. In such cases, ablation can be performed via ventricular transseptal or transapical approach. Transapical approach, with the ease of catheter maneuverability and better endocardial contact, may be performed surgically or percutaneously. In this case report, we describe a patient with both aortic and mitral mechanical prosthesis who underwent ventricular tachycardia (VT) ablation via percutaneous transapical endocardial approach with the use of closure device...
October 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29021388/in-vivo-beta-and-gamma-subthreshold-oscillations-in-rat-mitral-cells-origin-and-gating-by-respiratory-dynamics
#10
Nicolas Fourcaud-Trocmé, Virginie Briffaud, Marc Thévenet, Nathalie Buonviso, Corine Amat
In mammals, olfactory bulb (OB) dynamics are paced by slow and fast oscillatory rhythms at multiple levels: local field potential, spike discharge, and/or membrane potential oscillations. Interactions between these levels have been well studied for the slow rhythm linked to animal respiration. However, less is known regarding rhythms in the fast beta (10-35Hz) and gamma (35-100Hz) frequency ranges, particularly at the membrane potential level. Using a combination of intracellular and extracellular recordings in the OB of freely breathing rats, we show that beta and gamma subthreshold oscillations (STO) coexist intracellularly and are related to extracellular LFP oscillations in the same frequency range...
October 11, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29020623/functional-plasticity-of-odor-representations-during-motherhood
#11
Amit Vinograd, Yael Fuchs-Shlomai, Merav Stern, Diptendu Mukherjee, Yuan Gao, Ami Citri, Ian Davison, Adi Mizrahi
Motherhood is accompanied by new behaviors aimed at ensuring the wellbeing of the offspring. Olfaction plays a key role in guiding maternal behaviors during this transition. We studied functional changes in the main olfactory bulb (OB) of mothers in mice. Using in vivo two-photon calcium imaging, we studied the sensory representation of odors by mitral cells (MCs). We show that MC responses to monomolecular odors become sparser and weaker in mothers. In contrast, responses to biologically relevant odors are spared from sparsening or strengthen...
October 10, 2017: Cell Reports
https://www.readbyqxmd.com/read/29018536/efficacy-and-safety-of-non-vitamin-k-antagonist-oral-anticoagulants-compared-with-warfarin-in-patients-with-atrial-fibrillation
#12
Leif Friberg, Jonas Oldgren
AIMS: Non-vitamin K antagonist oral anticoagulants (NOACs) were in pivotal randomised controlled trials at least non-inferior to warfarin for stroke prevention in atrial fibrillation, but time in therapeutic range (TTR) for warfarin was lower (mean 55%-65%) than in Swedish general care where TTR is >70%. We compared efficacy and safety of NOACs and warfarin treatment for stroke prevention in Sweden. METHODS: Retrospective cohort study of all non-selected oral anticoagulation naïve atrial fibrillation patients with first prescription for NOACs or warfarin between December 2011 and December 2014, excluding patients with mitral stenosis or mechanical valvular prosthesis...
2017: Open Heart
https://www.readbyqxmd.com/read/29016551/pectoral-fascial-pecs-i-and-ii-blocks-as-rescue-analgesia-in-a-patient-undergoing-minimally-invasive-cardiac-surgery
#13
Suraj Yalamuri, Rebecca Y Klinger, W Michael Bullock, Donald D Glower, Brandi A Bottiger, Jeffrey C Gadsden
INTRODUCTION: Patients undergoing minimally invasive cardiac surgery have the potential for significant pain from the thoracotomy site. We report the successful use of pectoral nerve block types I and II (Pecs I and II) as rescue analgesia in a patient undergoing minimally invasive mitral valve repair. CASE REPORT: In this case, a 78-year-old man, with no history of chronic pain, underwent mitral valve repair via right anterior thoracotomy for severe mitral regurgitation...
October 6, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28994867/mid-terme-results-of-cardiac-surgery-of-valve-replacement-by-mechanical-prosthesis-about-861-patients
#14
Djafer Boulanouar
BACKGROUND: Patients with mechanical valvular prostheses are becoming more numerous in our country. Their medical care poses a number of problems in a particular socio-economic context of our geographical regions. AIM: The purpose of this study was to identify the complications of this heart valve replacement surgery by mechanical prostheses and try to compare our results with those of literature. METHODS: From January 1998 to June 2003, 861 patients were operated for acquired valvular heart disease (413 men and 448 women), average age 39±11 years...
November 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28994691/distortion-of-aortic-valve-from-mechanical-traction-imposed-by-the-mitral-valve-prosthesis-the-three-dimensional-transesophageal-echocardiographic-perception
#15
Saravana Babu, Unnikrishnan P Koniparambil, Muthu Kumar, Bineesh K Radhakrishnan, Neelam Aggarwal, Saurabh Nanda
Iatrogenic injury to the aortic valve is a rare but frequently reported complication during mitral valve surgeries. Intraoperative 2-dimensional transesophageal echocardiography (2D TEE) has a major impact in diagnosing these injuries, so that timely intervention is possible. However, 2D TEE has lot of limitations during the perioperative period, which can be overcome by the three dimensional echocardiography (3D-TEE). We report a case where 3D TEE has undoubtedly delineated the cause for distortion of aortic sinus after mitral valve replacement and helped in the successful outcome...
October 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28994679/ischemic-mitral-regurgitation
#16
REVIEW
Praveen Kerala Varma, Neethu Krishna, Reshmi Liza Jose, Ashish Narayan Madkaiker
Ischemic mitral regurgitation (IMR) is a frequent complication of left ventricular (LV) global or regional pathological remodeling due to chronic coronary artery disease. It is not a valve disease but represents the valvular consequences of increased tethering forces and reduced closing forces. IMR is defined as mitral regurgitation caused by chronic changes of LV structure and function due to ischemic heart disease and it worsens the prognosis. In this review, we discuss on etiology, pathophysiology, and mechanisms of IMR, its classification, evaluation, and therapeutic corrective methods of IMR...
October 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28992972/atrioventricular-valve-regurgitation-in-patients-undergoing-total-cavopulmonary-connection-impact-of-valve-morphology-and-underlying-mechanisms-on-survival-and-reintervention
#17
Masamichi Ono, Julie Cleuziou, Jelena Pabst von Ohain, Elisabeth Beran, Melchior Burri, Martina Strbad, Alfred Hager, Jürgen Hörer, Christian Schreiber, Rüdiger Lange
OBJECTIVE: The study objective was to determine the mechanisms of atrioventricular valve regurgitation in single-ventricle physiology and their influence on outcomes after total cavopulmonary connection. METHODS: Among 460 patients who underwent a total cavopulmonary connection, 101 (22%) had atrioventricular valve surgery before or coincident with total cavopulmonary connection. RESULTS: Atrioventricular valve morphology showed 2 separated in 33 patients, mitral in 11 patients, tricuspid in 41 patients, and common in 16 patients...
September 15, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28986731/successful-management-of-prolonged-venovenous-extracorporeal-membrane-oxygenation-in-an-octogenarian
#18
Masami Takagaki, Hiroki Yamaguchi, Shinichi Mitsuyama, Tasuku Kadowaki, Takeshi Ando
Venovenous extracorporeal membrane oxygenation is now an established treatment for acute respiratory distress syndrome. However, this treatment remains rare in octogenarians and is associated with poor outcomes. An 81-year-old man with a history of chronic obstructive pulmonary disease and heavy smoking underwent mitral and tricuspid valve repair and the Maze procedure for mitral and tricuspid regurgitation and paroxysmal atrial fibrillation. Although he was extubated the following day, his postoperative course was complicated with pneumonia followed by acute respiratory distress syndrome...
October 6, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28982562/prosthetic-mitral-surgical-valve-in-transcatheter-aortic-valve-replacement%C3%A2-recipients-a-multicenter-analysis
#19
Ignacio J Amat-Santos, Carlos Cortés, Luis Nombela Franco, Antonio J Muñoz-García, Jose Suárez De Lezo, Enrique Gutiérrez-Ibañes, Vicenç Serra, Mariano Larman, Raúl Moreno, Jose M De La Torre Hernandez, Rishi Puri, Pilar Jimenez-Quevedo, José M Hernández García, Juan H Alonso-Briales, Bruno García, Dae-Hyun Lee, Paol Rojas, Teresa Sevilla, Renier Goncalves, Silvio Vera, Itziar Gómez, Josep Rodés-Cabau, José A San Román
OBJECTIVES: The aim of this study was to determine the prognosis and specific complications of patients with prosthetic mitral valves (PMVs) undergoing transcatheter aortic valve replacement (TAVR). BACKGROUND: TAVR is performed relatively often in patients with PMVs, but specific risks are not well described. METHODS: A multicenter analysis was conducted, including patients with severe symptomatic aortic stenosis who underwent TAVR at 10 centers...
October 9, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28977372/improved-mitral-valve-coaptation-and-reduced-mitral-valve-annular-size-after-percutaneous-mitral-valve-repair-pmvr-using-the-mitraclip-system
#20
Johannes Patzelt, Yingying Zhang, Harry Magunia, Miriam Ulrich, Rezo Jorbenadze, Michal Droppa, Wenzhong Zhang, Henning Lausberg, Tobias Walker, Peter Rosenberger, Peter Seizer, Meinrad Gawaz, Harald F Langer
Aims: Improved mitral valve leaflet coaptation with consecutive reduction of mitral regurgitation (MR) is a central goal of percutaneous mitral valve repair (PMVR) with the MitraClip® system. As influences of PMVR on mitral valve geometry have been suggested before, we examined the effect of the procedure on mitral annular size in relation to procedural outcome. Methods and results: Geometry of the mitral valve annulus was evaluated in 183 patients undergoing PMVR using echocardiography before and after the procedure and at follow-up...
August 1, 2017: European Heart Journal Cardiovascular Imaging
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