abnormal bulbus cordis morphology abnormal bulbus cordis septation MP:0010582 2010-10-05T01:53:41Z csmith MPheno.ontology anomaly in the process in which the distal swelling of the primitive heart tube separates into an inferior end, which will form much of the right ventricle, and a superior end, which first form an outflow channel called the conotruncus; the conotruncus will in turn give rise to the more proximal conus cordis and the more distal truncus arteriosus