Results 51 to 60 of about 1,127,089 (380)

Polypyrrole-chitosan conductive biomaterial synchronizes cardiomyocyte contraction and improves myocardial electrical impulse propagation

open access: yesTheranostics, 2018
Background: The post-myocardial infarction (MI) scar interrupts electrical impulse propagation and delays regional contraction, which contributes to ventricular dysfunction. We investigated the potential of an injectable conductive biomaterial to restore
Zhi Cui   +8 more
semanticscholar   +1 more source

Assessment of Left Atrial Deformation and Function by 2-Dimensional Speckle Tracking Echocardiography in Healthy Dogs and Dogs With Myxomatous Mitral Valve Disease [PDF]

open access: yes, 2017
open7noBackground: The assessment of left atrial (LA) function by 2-dimensional speckle tracking echocardiography (STE) holds important clinical implications in human medicine. Few similar data are available in dogs.
Baron Toaldo, M.   +6 more
core   +2 more sources

A pseudo active kinematic constraint for a biological living soft tissue: an effect of the collagen network [PDF]

open access: yes, 2008
Recent studies in mammalian hearts show that left ventricular wall thickening is an important mechanism for systolic ejection and that during contraction the cardiac muscle develops significant stresses in the muscular cross-fiber direction. We suggested
Bourdarias, Christian   +2 more
core   +4 more sources

Transthoracic super-resolution ultrasound localisation microscopy of myocardial vasculature in patients [PDF]

open access: yes, 2023
Micro-vascular flow in the myocardium is of significant importance clinically but remains poorly understood. Up to 25% of patients with symptoms of coronary heart diseases have no obstructive coronary arteries and have suspected microvascular diseases. However, such microvasculature is difficult to image in vivo with existing modalities due to the lack
arxiv   +1 more source

Advances in computational modelling for personalised medicine after myocardial infarction [PDF]

open access: yes, 2017
Myocardial infarction (MI) is a leading cause of premature morbidity and mortality worldwide. Determining which patients will experience heart failure and sudden cardiac death after an acute MI is notoriously difficult for clinicians. The extent of heart
Berry, Colin   +4 more
core   +1 more source

Exercise training corrects control of spontaneous calcium waves in hearts from myocardial infarction heart failure rats [PDF]

open access: yes, 2012
Impaired cardiac control of intracellular diastolic Ca<sup>2+</sup> gives rise to arrhythmias. Whereas exercise training corrects abnormal cyclic Ca<sup>2+</sup> handling in heart failure, the effect on diastolic Ca<sup>2 ...
American Heart Association   +23 more
core   +1 more source

Recent Developments in Cardiac Contractility Modulation for Heart Failure [PDF]

open access: yesTexas Heart Institute Journal
None.
Joshua R. Hirsch, MD, Hamid Afshar, MD
doaj   +1 more source

Myocardial ischemic effects on cardiac electro-mechanical activity [PDF]

open access: yesarXiv, 2021
In this work, we investigated the effect of varying strength of Hyperkalemia and Hypoxia, in human cardiac tissue with a local ischemic subregion, on the electrical and mechanical activity of healthy and ischemic zones of the cardiac muscle. The Monodomain model in a deforming domain is taken with the addition of mechanical feedback and stretch ...
arxiv  

Gene therapy with Angiotensin-(1-9) preserves left ventricular systolic function after myocardial infarction [PDF]

open access: yes, 2016
BACKGROUND: Angiotensin-(1-9) [Ang-(1-9)] is a novel peptide of the counter-regulatory axis of the renin angiotensin system previously demonstrated to have therapeutic potential in hypertensive cardiomyopathy when administered via osmotic minipump in ...
Fattah, Caroline   +12 more
core   +2 more sources

Direct effects of glucose administration on heart rate, myocardial contraction, and duration of cardiac cycle in frog's heart

open access: yesJournal of the Practice of Cardiovascular Sciences, 2018
Background: Recent and emerging evidences show that glucose ingestion causes prolonged Q-T interval and can trigger arrhythmia. Objective: The objective of this study is to examine the effects of administration of glucose solutions on the heart rate ...
B I Waziri, A Shahzad
doaj   +1 more source

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