Results 11 to 20 of about 1,137,633 (259)

Myocardial Contraction Fraction: A Volumetric Measure of Myocardial Shortening Analogous to Strain.

open access: yesJournal of the American College of Cardiology, 2018
Stokke et al. [(1)][1] showed that despite reduced longitudinal and circumferential strain, ejection fraction is maintained by geometric factors, which prompted the editorialists to note, “although strain is emerging as the more optimal marker for LV systolic function, there seems to be no way ...
S. Matthews   +3 more
semanticscholar   +3 more sources

Myocardial contraction-relaxation coupling.

open access: yesAmerican Journal of Physiology-Heart and Circulatory Physiology, 2010
Since the pioneering work of Henry Pickering Bowditch in the late 1800s to early 1900s, cardiac muscle contraction has remained an intensely studied topic for several reasons. The heart is located centrally in our body, and its pumping motion demands the attention of the observer.
P. Janssen
semanticscholar   +5 more sources

A simple phenomenological approach for myocardial contraction: formulation, parameter sensitivity study and applications in organ level simulations

open access: yesMechanics of Soft Materials, 2021
Contraction in myocardial tissue is the result of a complex process through which chemical energy on the cellular level is converted into the mechanical energy needed to circulate blood throughout the body.
Barış Cansız   +2 more
semanticscholar   +1 more source

Left ventricle ejection fraction and strain derived by three-dimensional echocardiography are associated with exercise capacity in the patients with heart failure [PDF]

open access: yesVojnosanitetski Pregled, 2019
Background/Aim. Echocardiography represents the most commonly performed noninvasive cardiac imaging tests for the patients with heart failure (HF). The aim of this study was to assess the relationship between the exercise capacity parameters [peak oxygen
Pavlović-Kleut Milena   +2 more
doaj   +1 more source

Association between aortic stenosis severity and contractile reserve measured by two-dimensional strain under low-dose dobutamine testing [PDF]

open access: yesVojnosanitetski Pregled, 2013
Background/Aim. Early detection of left ventricle (LV) systolic dysfunction could be a clue for surgical treatment in patients with significant aortic stenosis (AS).
Banović Marko   +5 more
doaj   +1 more source

Effects of dispersed fibres in myocardial mechanics, Part II: active response

open access: yesMathematical Biosciences and Engineering, 2022
This work accompanies the first part of our study "effects of dispersed fibres in myocardial mechanics: Part I passive response" with a focus on myocardial active contraction.
Debao Guan   +5 more
doaj   +1 more source

The role of myocardial mechanical and QTc dispersion in detecting significant coronary artery disease

open access: yesJournal of Medicine in Scientific Research, 2022
Background Prolonged myocardial contraction and QT interval duration may be found in ischemic viable myocardium, yet it is unclear if noninvasive examination of regional nonhomogeneous myocardial mechanics and QT duration may detect patients with ...
Mohamed R Badran
doaj   +1 more source

SERCA2a ameliorates cardiomyocyte T-tubule remodeling via the calpain/JPH2 pathway to improve cardiac function in myocardial ischemia/reperfusion mice

open access: yesScientific Reports, 2021
Transverse-tubules (T-tubules) play pivotal roles in Ca2+-induced, Ca2+ release and excitation–contraction coupling in cardiomyocytes. The purpose of this study was to uncover mechanisms where sarco/endoplasmic reticulum Ca2+ ATPase (SERCA2a) improved ...
Shuai Wang   +9 more
doaj   +1 more source

Home - About - Disclaimer - Privacy