Results 11 to 20 of about 503,148 (240)

Cardiac cycle efficiency during counterpulsation [PDF]

open access: yesThe Journal of Thoracic and Cardiovascular Surgery, 2013
n ...
Gelsomino, Sandro   +1 more
openaire   +4 more sources

Systolic phases of the cardiac cycle in children [PDF]

open access: yesThe American Journal of Cardiology, 1969
The duration of the systolic phases of the cardiac cycle in 390 normal children was determined from high-speed simultaneous recordings of the electrocardiogram, phonocardiogram, apexcardiogram, and carotid pulse. Data were obtained on children 1 mo to 13 years of age and analyzed to define the independent effects of aging and heart rate on the systolic
David Golde, Luis Burstin
openaire   +4 more sources

Cardiac Progenitors and the Embryonic Cell Cycle [PDF]

open access: yesCell Cycle, 2007
Despite the critical importance of proper cell cycle regulation in establishing the correct morphology of organs and tissues during development, relatively little is known about how cell proliferation is regulated in a tissue-specific manner. The control of cell proliferation within the developing heart is of considerable interest, given the high ...
Sarah C. Goetz, Frank L. Conlon
openaire   +3 more sources

Cardiac alternans and intracellular calcium cycling [PDF]

open access: yesClinical and Experimental Pharmacology and Physiology, 2014
SummaryCardiac alternans refers to a condition in which there is a periodic beat‐to‐beat oscillation in electrical activity and the strength of cardiac muscle contraction at a constant heart rate. Clinically, cardiac alternans occurs in settings that are typical for cardiac arrhythmias and has been causally linked to these conditions.
Joshua N. Edwards, Lothar A. Blatter
openaire   +3 more sources

Reactivation of the mitosis-promoting factor in postmitotic cardiomyocytes [PDF]

open access: yes, 2003
Cardiomyocytes cease to divide shortly after birth and an irreversible cell cycle arrest is evident accompanied by the downregulation of cyclin-dependent kinase activities.
Datwyler, D. A.   +5 more
core   +1 more source

Cellular Classes in the Human Brain Revealed In Vivo by Heartbeat-Related Modulation of the Extracellular Action Potential Waveform [PDF]

open access: yes, 2020
Determining cell types is critical for understanding neural circuits but remains elusive in the living human brain. Current approaches discriminate units into putative cell classes using features of the extracellular action potential (EAP); in absence of
Anastassiou, Costas A.   +6 more
core  

Time related Characteristics of cardiac systole, diastole, baroreeeptor activity and inactivity during vagal stimulation and mild haemorrhage in the dog [PDF]

open access: yes, 1990
The duration of cardiac systole and diastole in each individual cardiac cycle were measured from aortic pressure curves during vagal stimulation and mild haemorrhage with simultaneous recording of aortic baroreceptor single fibre nerve activity.
Hakumäki, Martti O.K.   +3 more
core   +2 more sources

Evaluation of the strain-line patterns in a human left ventricle: A simulation study [PDF]

open access: yes, 2015
The aim of this paper is to emphasise the role of the primary strain-line patterns in a human left ventricle (LV) within the complex system that is the heart.
NARDINOCCHI, Paola   +2 more
core   +1 more source

Tissue-Specific Cell Cycle Indicator Reveals Unexpected Findings for Cardiac Myocyte Proliferation. [PDF]

open access: yes, 2016
RationaleDiscerning cardiac myocyte cell cycle behavior is challenging owing to commingled cell types with higher proliferative activity.ObjectiveTo investigate cardiac myocyte cell cycle activity in development and the early postnatal period.Methods and
Chen, Ju   +2 more
core   +1 more source

Influence of the cardiac cycle on pCASL: cardiac triggering of the end-of-labeling [PDF]

open access: yesMagnetic Resonance Materials in Physics, Biology and Medicine, 2017
In arterial spin labeling (ASL), the cardiac cycle might adversely influence signal-stability by varying the amount of label created, labeling efficiency and/or transport times. Due to the long labeling duration in pseudo-Continuous ASL (pCASL), the blood labeled last contributes most to the ASLsignal.
Verbree, J., Osch, M.J.P. van
openaire   +4 more sources

Home - About - Disclaimer - Privacy