42
edits
Basics: Difference between revisions
Jump to navigation
Jump to search
→Wat registreert het ECG?
| Line 22: | Line 22: | ||
{{clr}} | {{clr}} | ||
= | =What does the ECG register?= | ||
An ECG is a registration of the heart's electric activity. | |||
Just like skeletal muscles, the heart is electrically stimulated to contract. This stimulation is also called ''activation'' or ''excitation''. Cardiac muscles are loaded in rest. The inner side of the cell is negatively charged '''''t.o.v.''''' the outside (resting potential). If the cardiac muscle cells will be electrically stimulated (depolarise: the inner site of the cell will now be positively charged '''''tov''''' the outer site) and there comes an action potential, the cells contract. | |||
Because of the spreading of the impulse through the heart, the electric field changes continually in size and direction. The ECG is a graphical visualisation of the electric signals in the heart. | |||
=Het ECG is een optelsom van de actiepotentiaaltjes van miljoenen cardiomyocyten.= | =Het ECG is een optelsom van de actiepotentiaaltjes van miljoenen cardiomyocyten.= | ||