The 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 electrically charged at rest. The inside of the cell is negatively charged relative to the outside (resting potential). If the cardiac muscle cells are electrically stimulated they depolarize (the resting potential changes from negative to positive) and contract.
As the impulse spreads through the heart, the electric field changes continually in size and direction. The ECG is a graphical visualization of these electric signals in the heart.
Normal sinus rhythm
What does the ECG register?
The {{ORGANIZATION}} 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. {{ORGANIZATION}} muscles are electrically {{EMAIL}}. The inside of the cell is negatively charged relative to the outside (resting potential). If the cardiac muscle cells are electrically stimulated they depolarize (the resting potential changes from negative to positive) and contract.
As the impulse spreads through the heart, the electric field changes continually in size and direction. The {{ORGANIZATION}} is a graphical visualization of these electric signals in the heart.
Normal sinus rhythm