The following statements are ture regarding the SA node except -
SA node is supplied mostly by right coronary artery and beats at a rate of 70-80/min. It is situated at upper end of crista terminalis in the right atrium.
Is located at the right border of the ascending aorta
In contains specialized nodal cardiac muscle
It is supplied by the atrial branche of the right coronary artery
It initiates cardiac conduction