|
|
||||||||
Departments of 1 Clinical Pharmacology and 2 Medicine, University of Adelaide, Royal Adelaide Hospital, Adelaide, South Australia, 5000, Australia
Gastric emptying is a determinant of the postprandial glycemic and cardiovascular responses to oral carbohydrate. We evaluated the effects of a solid meal on gastric emptying and the glycemic and cardiovascular responses to oral glucose in healthy older subjects. Ten subjects aged 72.1 ± 1.9 yr were studied. Each subject had measurements of gastric emptying, blood glucose, serum insulin, blood pressure, and heart rate after ingestion of a 50-g glucose drink (300 ml) with (mixed meal) or without (liquid only) a solid meal (300 g ground beef). Gastric emptying of liquid was initially slightly more rapid (P < 0.05) after the mixed meal compared with liquid only at 5 min (92.0 ± 1.5 vs. 96.0 ± 1.3%) and much slower (P < 0.05) after 120 min. The time to peak blood glucose was less (39.0 ± 4.0 vs. 67.5 ± 10.3 min; P < 0.01) and blood glucose subsequently lower (P < 0.01) after the mixed meal. The increase in serum insulin was greater (P < 0.001) after the mixed meal. Blood pressure fell (P < 0.05) in the first 30 min, with no difference between the two meals. Increase in heart rate after both meals (P < 0.005), was greater (P < 0.05) after the mixed meal. The presence of a noncarbohydrate solid meal had discrepant effects on early and subsequent emptying of a nutrient liquid, which affects postprandial glycemia and increased heart rate.
glycemic control; blood pressure; postprandial hypotension; blood glucose
This article has been cited by other articles:
![]() |
R. C.G. Alfenas and R. D. Mattes Influence of Glycemic Index/Load on Glycemic Response, Appetite, and Food Intake in Healthy Humans Diabetes Care, September 1, 2005; 28(9): 2123 - 2129. [Abstract] [Full Text] [PDF] |
||||
![]() |
R. Chaikomin, S. Doran, K. L. Jones, C. Feinle-Bisset, D. O'Donovan, C. K. Rayner, and M. Horowitz Initially more rapid small intestinal glucose delivery increases plasma insulin, GIP, and GLP-1 but does not improve overall glycemia in healthy subjects Am J Physiol Endocrinol Metab, September 1, 2005; 289(3): E504 - E507. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |