Modulation of Myocardial Contraction by Peroxynitrite [PDF]
Frontiers in Physiology, 2012 Peroxynitrite is a potent oxidant that is quickly emerging as a crucial modulator of myocardial function. This review will focus on the regulation of myocardial contraction by peroxynitrite during health and disease, with a specific emphasis on ...
Mark eKohr +3 more
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Acetate suppresses myocardial contraction via the short-chain fatty acid receptor GPR43 [PDF]
Frontiers in Physiology, 2022 The heart has high energy requirements, with an estimated 40%–60% of myocardial ATP production derived from the oxidation of fatty acids under physiological conditions.
Xuan Jiang +10 more
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Speckle tracking echocardiography analyses of myocardial contraction efficiency predict response for cardiac resynchronization therapy [PDF]
Cardiovascular Ultrasound, 2018 Background In patients with left ventricular (LV) dysssynchrony, contraction that doesn’t fall into ejection period (LVEj) results in a waste of energy due to inappropriate contraction timing, which was now widely treated by cardiac resynchronization ...
Zibire Fulati +6 more
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Myocardial Contraction during the Diastolic Isovolumetric Period: Analysis of Longitudinal Strain by Means of Speckle Tracking Echocardiography [PDF]
Journal of Cardiovascular Development and Disease, 2018 Background: According to the ventricular myocardial band model, the diastolic isovolumetric period is a contraction phenomenon. Our objective was to employ speckle-tracking echocardiography (STE) to analyze myocardial deformation of the left ventricle ...
Vicente Mora +10 more
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Myocardial Contractions and the Ventricular Pressure--Volume Relationship [PDF]
arXiv, 2010 We present a reduced-order heart model with the aim of introducing a novel point of view in the interpretation of the pressure-volume loops. The novelty of the approach is based on the definition of active contraction as opposed to that of active stress.
Paola Nardinocchi +2 more
arxiv +3 more sources
Myocardial contraction fraction predicts mortality in the oldest old [PDF]
International Journal of Cardiology: Heart & Vasculature, 2022 Background: People over the age of 85 are the world's most rapidly growing age group. Ejection fraction (EF) may be limited prognostically in this population and myocardial contraction fraction (MCF) may be more accurate.
David Leibowitz +6 more
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A novel quantitative indicator of the left ventricular contraction based on volume changes of the left ventricular myocardial segments [PDF]
arXiv, 2018 Ejection fraction (EF) is commonly measured by echocardiography, by dividing the volume ejected by the heart (stroke volume) by the volume of the filled heart (end-diastolic volume). Utilizing volume changes of left myocardial segments per a cardiac cycle, physical laws and mathematical equations specific echocardiographic data, this paper serves to ...
Mersedeh Karvandi, Saeed Ranjbar
arxiv +3 more sources
Regulation of myocardial contraction as revealed by intracellular Ca2+ measurements using aequorin [PDF]
Journal of Physiological SciencesOf the ions involved in myocardial function, Ca2+ is the most important. Ca2+ is crucial to the process that allows myocardium to repeatedly contract and relax in a well-organized fashion; it is the process called excitation–contraction coupling.
Satoshi Kurihara, Norio Fukuda
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Prognostic impact of myocardial contraction fraction in patients undergoing transcatheter aortic valve replacement for aortic stenosis. [PDF]
Cardiovasc Diagn Ther, 2020 Romeo FJ +8 more
europepmc +3 more sources
Frontiers in PhysiologyMyocardial contractility (MC) is a fundamental concept that is widely used to describe the cardiac muscles’ mechanical function, yet its definitions in textbooks and literature are vague, inconsistent, and often contradictory.
Serena Y. Kuang, Gorune Geloian
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