Page 83 - The Miracle of Electricity in the Body

Adnan Oktar (Harun Yahya) 81

Who commands them to beat regularly and in harmony?
The only answer to all these questions, of course, is Almighty God,
the Lord of the worlds.

Heart Cells and Electricity Production

The cells that contract so tirelessly must possess a design that can
begin to work the moment electrical current reaches them. The cells
must respond to every single signal that reaches them, on an average of
72 times per minute.
If you examine the heart under a microscope, you can count more

By its special creation, the heart regulates the speed at which it beats. A group of
cells known as the SA node produce electrical impulses in the upper part of the
right atrium. These impulses spread throughout the heart and allow the four
chambers to contract at just the right time. This electrical impulse travels so
quickly from one side of the heart to the other that it appears that all the heart’s
cells are beating at once. This harmony, which is one of the reasons for our sur-
vival, is another example of the mercy of our Lord.

SA node
AV node

Atrial/
Atrial Ventricular
Ventricular
rhythm rhythm dilation
Purkinje
Milivolt
fibers

Millisecond

Normal The SA rhythm is the
ECG heart’s normal beat,
which is 60 to 100
times a minute. It takes
0.03 seconds for the
electrical impulse to
travel from the SA
node to the AV node,
Increased heart rate Ventricular contraction Valve stenosis and this is known as
normal sinus rhythm.
Abnormal ECG