has part has part has_part characteristic of part of has modifier abnormal heart right atrium morphology abnormal crista terminalis morphology 2010-09-30T01:15:45Z csmith any structural anomaly of the vertical crest of the interior wall of the right atrium that lies to the right of the sinus of the vena cava and separates this from the remainder of the right atrium MP:0010495 MPheno.ontology morphology abnormal crista terminalis