Results 11 to 20 of about 585,907 (247)

Structure-function relationships in the aortic valve [PDF]

open access: yes, 2012
PhDGlobally, heart valve dysfunction constitutes a large portion of the cardiovascular disease load, causing high rates of mortality in European and industrialized countries.
Anssari-Benam, Afshin
core   +4 more sources

Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine [PDF]

open access: yes, 2013
Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine’s performance in areas such as fuel ...
CLENCI, Adrian   +12 more
core   +1 more source

Detection of diesel engine valve clearance by acoustic emission. [PDF]

open access: yes, 2009
This paper investigated, using experimental method, the suitability of acoustic emission (AE) technique for the condition monitoring of diesel engine valve faults.
Gu, Fengshou   +3 more
core   +4 more sources

Resource governance and the politics of the social: Ordering in and by socio‐ecological systems

open access: yesGeo: Geography and Environment, 2018
In studies of natural resource governance, agency is commonly treated as a property that evolves in conditions of socio‐ecological systems (SESs). While the SES framework has established its position within a multidisciplinary scholarship, it remains ...
Helena Valve
doaj   +1 more source

Natural history observations in moderate aortic stenosis

open access: yesBMC Cardiovascular Disorders, 2021
Background The natural history of patients with moderate aortic stenosis (AS) is poorly understood. We aimed to determine the long-term outcomes of patients with moderate AS.
Yu Du   +15 more
doaj   +1 more source

Valve-in-valve Transcatheter Aortic Valve Replacement for Failed Surgical Valves and Adjunctive Therapies

open access: yesUS Cardiology Review, 2022
While redo surgical aortic valve replacement has traditionally been the gold standard for the treatment of failed surgical valves, valve-in-valve (ViV) transcatheter aortic valve replacement (TAVR) has arisen as a viable, less invasive option with the ...
Emily Perdoncin   +2 more
doaj   +1 more source

Outcomes in Asymptomatic Severe Aortic Stenosis With Preserved Ejection Fraction Undergoing Rest and Treadmill Stress Echocardiography

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2018
BackgroundIn asymptomatic patients with severe aortic stenosis and preserved left ventricular ejection fraction, we sought to assess the incremental prognostic value of resting valvuloarterial impedence (Zva) and left ventricular global longitudinal ...
Chetan P. Huded   +11 more
doaj   +1 more source

Correlations between geomagnetic field and global occurrence of cardiovascular diseases: evidence from 204 territories in different latitude

open access: yesBMC Public Health, 2023
Background The correlation between stable geomagnetic fields and unstable geomagnetic activities with mortality, incidence, and prevalence of cardiovascular diseases (CVDs) remains ambiguous.
Zheng Chai   +4 more
doaj   +1 more source

Transcatheter Edge-to-edge Repair of Severe Tricuspid Regurgitation

open access: yesUS Cardiology Review, 2019
Despite the increasing knowledge of the long-term adverse consequence of severe tricuspid regurgitation (TR), most patients with moderate- to-severe TR are still treated conservatively because of the high risk of surgery.
Shu-I Lin   +7 more
doaj   +1 more source

Non-linear finite element analyses of the aortic heart valve [PDF]

open access: yes, 2004
Includes bibliographical references.Finite element models of the aortic heart valve have been successfully used in the past to gain insight into the mechanics of the valve and to aid in understanding of valve failure.
Koch, Thorsten M
core   +1 more source

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