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Medtronic-hall aortic valve obstruction: case series from a single centre in New Zealand.
ANZ J Surg
October 2022
Department of Cardiology, Christchurch Public Hospital, Christchurch, New Zealand.
Right Heart Failure as an Atypical Presentation of Chronic Type a Aortic Dissection - Multimodality Imaging for Accurate Diagnosis and Treatment. A Case Report and Mini-review of Literature.
J Crit Care Med (Targu Mures)
July 2022
George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Targu Mures Romania.
Background: An intrapericardial organized haematoma secondary to chronic type A aortic dissection is an extremely rare cause of right heart failure. Imaging studies are essential in recognising and diagnosis of this distinctive medical condition and guiding the anticipated treatment.
Case Presentation: A 70-year-old male patient was admitted for progressive symptoms of right heart failure.
To Anticoagulate or Not? That Is the Question. Management of High-Risk Patients with Mechanical Mitral and Double Valves: A Case Series.
Heart Surg Forum
July 2019
Carilion Cardiothoracic Surgery, Department of Surgery, Virginia Tech-Carilion School of Medicine, Roanoke, Virginia, USA.
The Achilles heel of mechanical valves appears to be the need for anticoagulation. Several different types of mechanical valves have come and gone. The success or lack thereof of these valves depended on their various designs.
View Article and Find Full Text PDF4D Flow MRI quantification of blood flow patterns, turbulence and pressure drop in normal and stenotic prosthetic heart valves.
Magn Reson Imaging
January 2019
Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
Purpose: To assess valvular flow characteristics and pressure drop in a variety of normal and stenotic prosthetic heart valves (PHVs) using 4D Flow MRI.
Materials And Methods: In-vitro flow phantoms with four different PHVs were studied: Medtronic-Hall tilting disc, St. Jude Medical standard bileaflet (STJM), Medtronic CoreValve Evolut R and Edwards SAPIEN 3.
Characterization of Effective Orifice Areas of Mitral Prosthetic Heart Valves: An In-Vitro Study.
J Heart Valve Dis
November 2017
Quebec Heart and Lung Institute, Laval University, Québec, Canada.
Background: Reference values of hemodynamic parameters for the assessment of prosthetic heart valves are necessary, and ideally need to be provided by entities independent of the valve manufacturers. Thus, the study aim was to provide, in vitro, normal reference values of the effective orifice area (EOA) for different models and sizes of mitral prosthetic valve, and to assess the determinants of EOA and mean transvalvular pressure gradient (mTPG).
Methods: Four models of mechanical prostheses were tested (one mono-leaflet, three bi-leaflet) and four models of bioprostheses (two bovine pericardial, two porcine) on a double-activation pulsed duplicator that was specifically designed and optimized for assessing the hemodynamic performance of mitral prosthetic valves.
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