Results 241 to 250 of about 13,265,348 (295)

A Beginner's Guide to Cardiac Optical Mapping. [PDF]

Cardiovasc Eng Technol
Trampel KA, Li B, George SA, Efimov IR.
europepmc   +1 more source

Adolescent videogaming, cognitive development and interactions with gender in the SCAMP cohort

Thompson R, Heller J, Curtis N, Larsen SR, Shen C, Smith RB, Thomas MS, Dumontheil I, Toledano MB.   +8 more
europepmc   +1 more source

An automatic cardiac action potential duration meter

American Journal of Physiology-Heart and Circulatory Physiology, 1979
The duration of a cardiac action potential (AP) is measured from the beginning of its upstroke to the end of its asymptotic repolarization phase: the end being given by a point in proportion to the AP amplitude. If the resting potential, AP amplitude, as well as the duration, alter simultaneously, frequent accurate measurements can be extremely ...
M J, Lab, R K, Child
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Determinants of motor unit action potential duration

Clinical Neurophysiology, 1999
Motor unit action potential (MUAP) recordings are modeled by means of a single muscle fiber simulation program, to define two key subcomponents comprising the complete physiologic MUAP duration. A number of defining properties of these subcomponents are further developed.A single muscle fiber simulation program is utilized with various muscle fiber ...
D, Dumitru, J C, King, M J, Zwarts
openaire   +2 more sources

Estimating Atrial Action Potential Duration from Electrograms

IEEE Transactions on Biomedical Engineering, 2009
Electrogram analysis is important in clinical and experimental settings. Activation recovery interval (ARI) has been used to measure ventricular action potential duration (APD) but its suitability for the atria has not been addressed. Mapping of atrial repolarization may be especially important during nerve stimulation since large heterogenous APD ...
Edward J. Vigmond, Vincent Tsoi, Yalin Yin, Pierre Pagé, Alain Vinet   +4 more
openaire   +2 more sources

Effect of epinephrine on the duration of action potential of papillary muscles

Experientia, 1974
Im Gegensatz zur Kontrollbedingung (Tyrodelosung 1.8 mM Ca, 31°C, Reizfrequenz 30/min) ruft Adrenalin 6×10−6 M im Ca-freien Milieu eine significante Verlangerung der Aktionspotenziale hervor. Die Zugabe von Ca2+ kehrt die Aktionspotenzialdauer mit voller Entwicklung der positiv inotropen Wirkung zu Ausgangswerten zuruck.
P, Bravený, M, Simurdová, J, Sumbera
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Modulation of action potential duration on myocyte hypertrophic pathways

Journal of Molecular and Cellular Cardiology, 2006
Prolongation of the action potential duration (APD) has consistently been observed in experimental models of cardiac hypertrophy and failure as well as in humans and is partially attributed to a reduction of a hyperpolarizing current provided by the calcium-independent transient outward K(+) channel (I(to)).
Djamel, Lebeche, Roger, Kaprielian, Roger, Hajjar   +2 more
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Motor unit action potential duration and muscle length

Muscle & Nerve, 1999
Motor unit action potential (MUAP) components are investigated by means of single fiber computer simulations and clinical measurements. The single fiber simulations have essentially full bandwidth without noise, whereas the clinical measurements were made with a 3-10,000-Hz bandwidth utilizing approximately 1000 averages to reduce noise optimally ...
D, Dumitru, J C, King
openaire   +2 more sources

Mean Duration of Action Potentials in Extraocular Muscles

Archives of Ophthalmology, 1960
Electromyography of skeletal muscles has been in use for over 20 years and has proven to be a valuable diagnostic procedure. In analyzing the parameters of the electromyogram (EMG), Buchthal 1 has pointed out the importance of the mean duration of the muscle action potential (the mean of the duration of 20 different action potentials), noting that the ...
I, GAMSTORP, C, KUPFER
openaire   +2 more sources