<prompt> True about atrioventricular groove are all EXCEPTContains left anterior descending coronary aeryAlso called coronary sulcusContains right coronary aeryContains circumflex branch of left coronary aery  <response>: AV groove is aka coronary sulcus it separates the atria from the ventricles. It contains the RCA on the right the circumflex branch of left coronary aery on the left. 