Contribution to the study of the blood supply of the sinus node in Corriedale sheep

Abstract

The arterial blood supply of the sinus node has been studied in 50 Corriedale sheep. The sinus node was nourished by the ramus proximalis atrii sinistri in 19 (38,0% - 6,9) of the examined hearts; by the ramus proximalis atrii dextri in 18 (36,0% ± 6 ,8) of the examined organs; by the ramus proximalis atrii dextri and ramus distalis atrii dextri in 5 (10,0% ± 4,2) of the examined specimens; by the ramus intermedius atrii dextri and ramus proximalis atrii sinistri in 4 (8,0% ± 3,8) of the examined pieces; by the ramus proximalis atrii dextri and ramus intermedius atrii dextri in 2 (4,0% ± 2 ,8) of the examined animals; by the ramus intermedius atrii dextri in 1 (2,0% ± 2 ,0 ) of the examined hearts and by the ramus distalis atrii dextri in 1 (2,0% ± 2,0) of the examined organs. Significant differences in the pattern of the arterial blood supply of the sinus node were found between Corriedale and Merino sheeps.