Cardiovascular responses of dogs and pigs exposed to similar physiological stress

Effects of Exercise Intensity and Pre-Exercise Feeding on Splanchnic Tissue Blood Flow

“…Several studies in dogs reported little or no change in splanchnic BFs during EX (11,16,32,34 (30,31). The mean arterial pressure (MAP) at REST for the current data (98.7 mmHg) was similar to some reports (13,32), but were substantially lower than the 115-123 mmHg reported for pigs in other studies (1,2,23,39).…”

“…The increase in MAP between REST and N-MAX (19 mmHg) was comparable to that reported for pigs (1) and man (4,30), but less than other reported increments of 31-37 mmHg for pigs (23,32,39).…”

“…The cardiac outputs from the current study compare favorably with those measured at similar work rates in untrained pigs (23,32,39) and in man (30), but were lower than those reported in trained pi'gs (13,23,39). Meaningful comparisons with other studies, reporting cardiac outputs in dogs (3,9,11,16,21,24,25,28), baboons (15), and man (4,5,18) (25), which contradit:ts other reports.…”

“…Several studies have reported that feeding increases splanchnic BF (SEF) at rest (7,11,16,26,27,29), with the increased BF correlated with the increased demands ff the digestive and absorptive processes (7). Exercise has produced a diminution of gastric secretions (19) and eecreased SBF (2,3,4,21,24,25,28,30,31)', while others have found no change in SBF (11,16,32,34). Postprandial EX has similarly reduced SBF compared to resting values (3,11,35), while some authors have reported no change (16,36).…”

“…Lastly, reports for pigs (1,2,32) and other subjects (4,9,24,28,34) (Table 3) and PV-BF (Table 4) at rest. These data are in agreement with previous reports of postpran ial mesenteric hyperemia (3,7,11,13,16,26,27,33,36,37).…”