Visualizing Excitation Waves inside Cardiac Muscle Using Transillumination
نویسندگان
چکیده
منابع مشابه
Membrane excitation in cardiac muscle.
The contributions made during the past 10 years are reviewed. Intracellular recording has made it possible to state absolute values for the cardiac resting potential (90 mv., inside negative to outside) and the "overshoot" during activity (30 mv., inside positive to outside). The surface membrane of a resting fiber is considered to be predominately permeable to K ions. During activity, Na condu...
متن کاملExcitation of Cardiac Muscle Cells
was used to deliver rectangular pulses for extracellular field stimulation of individual heart cells. We found that single frog and guinea pig ventricular myocytes are excitable with rectangular pulse field stimulation over a wide range of pulse durations, ranging from 10 msec to as little as 20 ,usec. The excitation field strength varies inversely with pulse duration as described by the Weiss-...
متن کاملExcitation Contraction Coupling in Cardiac Muscle
It is well established that excitation contraction (EC) coupling in cardiac myocytes is mediated by the entry of calcium ions (Ca 2 ) from the bathing medium into the cell cytoplasm (Fabiato, 1985), which then triggers calcium-induced calcium release (CICR) from the sarcoplasmic reticulum (SR). More recently, it was proposed that a second, quite separate, EC-coupling process, mediated by an eff...
متن کاملInitiation Of Excitation Waves
The thesis considers analytical approaches to the problem of initiation of excitation waves. An excitation wave is a threshold phenomenon. If the initial perturbation is below the threshold, it decays; if it is large enough, it triggers propagation of a wave, and then the parameters of the generated wave do not depend on the details of the initial conditions. The problem of initiation of excita...
متن کاملV-waves of excitation
In this paper we communicate recent developments in theory, experiment, and computer simulations of V-shaped waves in excitable media. The waves appear as the result of oblique collisions of two plane waves, and constitute a one-parametric family of V-like patterns distinguishable by the angle of collision. The shape and position of V-patterns are stable with respect to localized perturbations ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2001
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(01)76034-1