Depolarization occurs when the majority of members of a society accept that even if people don’t agree on an issue, they hold a shared understanding of the values that underpin it. In democracies, ...

and an increase in the ATP/ADP ratio (1); the increased ATP/ADP ratio leads to closing of the potassium channel and depolarization of the cell (2); and cell depolarization opens a calcium channel ...

The time from the beginning of the P wave, indicating atrial depolarization, to the beginning of the QRS complex, representing ventricular depolarization, is the PR interval. This represents the ...

The PR interval is the time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization). The normal PR interval measures 0.12-0.20 ...