Following the massive depolarization, the membrane repolarizes
again due to the efflux of [K.sup.+].
We found a major problem in the NG, MT, and KT models: theyall fail to repolarize
andtoproduce physiological APs when [[[K.sup.+]].sub.o] is lower than 4 mM.
The QT interval in an ECG represents the total time needed for the ventricles to depolarize and repolarize
. The duration of the QT interval in our study was nearly in agreement with the values reported previously in partridge, helmeted guinea fowl, and green peafowl.
The impulse then passes back up the fast pathway into the atria that, because of the long transit time down the slow pathway, have had time to repolarize
. The reentrant P wave prematurely depolarizes the atria and resets the sinus node, resulting in a long P'--P interval before the next Wenckebach sequence begins.
The QT interval refers to the time it takes the chambers of the heart to "repolarize
" themselves so that the heart is ready for another contraction cycle.
As depolarization lasts longer, the membrane is unable to repolarize
, resulting in flaccid muscles.
When the cardiac cells repolarize
(reload) they exchange potassium for sodium and calcium.
The earliest repolarization occurred in posterobasal region of RV whereas the areas over the LV apex and adjacent area of the free wall were the last to repolarize
. (Anadolu Kardiyol Derg 2007: 7 Suppl 1; 93-4)
Through the specific channels, sodium, potassium, and calcium ions move across the outer cellular membrane to depolarize and repolarize
(2) Calling Marcus' essay "an unnecessary, and disingenuous, attempt to repolarize
American literary culture" (para.
A primary function of this channel is to repolarize
active neurons, so activation in the presence of ethanol would inhibit neuronal activity.
Hence, alterations in gene expression of cardiac potassium and calcium channels may dramatically affect the capability of a cardiac myocyte to repolarize