which one is known as the heart of the heart? and why?
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SA node is known as because it is pace maker of heart
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Sinaotrial node or SA node is known as the heart of the heart.
SA is the pacemaker of the heart that generates the initial rhythm and maintains heart beat.
It is situated just below and to right of SVC opening.
Any dysfunction of SA node can cause ineffective heart muscle contraction which can lead to an inadequate cardiac arrhythmias.
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