unlabelled : plasma atrial natriuretic polypeptide ( anp ) levels and plasma renin activity ( pra ) were measured in six left ventricular assist device ( lvad ) goats , four single artificial heart ( sah ) goats , i.e. , lvad animals with fibrillated hearts , and 3 total artificial heart ( tah ) calves .
C0018792
atrial
C0018787
hearts