Results 61 to 70 of about 4,738,170 (353)

Epidemiology of Musculoskeletal Injury during Racing on New Zealand Racetracks 2005–2011

open access: yesAnimals, 2017
The objective of the study was to determine the incidence of veterinary events that resulted in a horse failing to finish a race and identify risk factors for musculoskeletal injury (MSI) during a race. Data were obtained on Thoroughbred flat race starts
Charlotte Bolwell   +3 more
doaj   +1 more source

Second messenger systems underlying amine and peptide actions on cardiac muscle in the horseshoe crab, Limulus polyphemus [PDF]

open access: yes, 1989
The biochemical mechanisms by which octopamine, catecholamines and the peptide proctolin exert their actions on Limulus cardiac muscle were investigated.
Groome, J. R., Watson, Winsor H., III
core   +2 more sources

Indeterminacy of Spatiotemporal Cardiac Alternans

open access: yes, 2008
Cardiac alternans, a beat-to-beat alternation in action potential duration (at the cellular level) or in ECG morphology (at the whole heart level), is a marker of ventricular fibrillation, a fatal heart rhythm that kills hundreds of thousands of people ...
A. H. Nayfeh   +11 more
core   +2 more sources

Hematopoietic (stem) cells—The elixir of life?

open access: yesFEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo   +4 more
wiley   +1 more source

Cardiac Memory-induced T-wave Inversions [PDF]

open access: yes, 2020
Introduction: Cardiac memory refers to T-wave inversions that result when normal ventricular activation resumes following a period of abnormal ventricular activation.Case Report: We present a case of a 29-year-old man with a pacemaker who presented with ...
Cooper, Benjamin L.   +2 more
core  

The effects of repetitive electric cardiac stimulation in dogs with normal hearts, complete heart block and experimental cardiac arrest [PDF]

open access: yes, 1955
Direct cardiac stimulation was conducted in the open chest. In normal animals, auricular stimulation at frequencies faster than the spontaneous rate caused little change in vascular pressures or cardiac output.
GAERTNER, RA, STARZL, TE, WEBB, RC
core   +1 more source

Out-of-Hospital Cardiac Arrest during the Covid-19 Outbreak in Italy

open access: yesNew England Journal of Medicine, 2020
Out-of-Hospital Cardiac Arrest and Covid-19 From February 21 through April 1, 2019, a total of 229 cases of out-of-hospital cardiac arrest were reported in four provinces of Lombardy, Italy.
E. Baldi   +19 more
semanticscholar   +1 more source

Deep Learning for Cardiac Image Segmentation: A Review [PDF]

open access: yesFrontiers in Cardiovascular Medicine, 2019
Deep learning has become the most widely used approach for cardiac image segmentation in recent years. In this paper, we provide a review of over 100 cardiac image segmentation papers using deep learning, which covers common imaging modalities including ...
Chen Chen   +6 more
semanticscholar   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

Cardiac manifestations of PRKAG2 mutation. [PDF]

open access: yes, 2018
BACKGROUND:The Protein Kinase AMP-Activated Non-Catalytic Subunit Gamma 2 (PRKAG2) cardiac syndrome is characterized by glycogen accumulation in the cardiac tissue.
Ardehali, Reza   +3 more
core   +1 more source

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