| Left ventricular function and haemodynamics in ponies during exercise and recovery. | |
| | |
MedLine Citation:
|
PMID: 2920699 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Myocardial and haemodynamic responses to strenuous treadmill exercise were monitored with chronically implanted instrumentation in seven physically untrained ponies. In two other ponies, haemodynamics were monitored using a conventional catheter technique. During exercise (mean +/- sem heart rate = 203 +/- 3 beats/min), left ventricular peak systolic ahd end-diastolic blood pressure significantly increased from 125 +/- 2 to 208 +/- 6 mmHg and from 29 +/- 1 to 58 +/- 3 mmHg, respectively (P less than 0.05). Peak positive first derivative of left ventricular pressure (dP/dt) was also increased significantly, (1397 +/- 144 to 6016 +/- 325 mmHg/sec), as were myocardial segment velocity of shortening during systole (dL/dtsys) and stroke work (193 and 109 per cent, respectively). Paradoxically, segment systolic shortening was reduced significantly (P less than 0.05) with respect to resting control values for 10 mins after cessation of exercise, with the maximal reduction of 22 per cent occurring at 2 mins post exercise. In addition, left ventricular segment stroke work decreased significantly to 67 per cent of resting control value at 2 mins post exercise. This study demonstrates that analysis of regional myocardial performance in conjunction with haemodynamic data permits a detailed description of cardiac events during and immediately following exercise, facilitating definition of changes which are not readily reflected by haemodynamics. Based on these findings, the authors conclude that untrained ponies may readily complete short bouts of near-maximal exercise, yet experience significantly diminished left ventricular function in the immediate post exercise period. |
| | |
Authors:
|
K S Rugh; H E Garner; J R Miramonti; D G Hatfield |
Related Documents
:
|
1588979 - Improvement in exercise performance by inhalation of methoxamine in patients with impai... 7852519 - Effect of growth hormone (hgh) replacement therapy on physical work capacity and cardia... 15584249 - Effect of physical exercise training on health-related quality of life and exercise tol... 18396459 - Exercise-induced right ventricular dysplasia/cardiomyopathy--an emerging condition dist... 2766819 - Diastolic time during low-level exercise in the late phase of hospitalization for acute... 9794089 - Effects of magnesium orotate on exercise tolerance in patients with coronary heart dise... 21107599 - Endurance exercise immediately before sea diving reduces bubble formation in scuba divers. 2690809 - Plasma renin activity and aldosterone: correlations with moderate hypohydration. 3258509 - Energy costs of walking and standing with functional neuromuscular stimulation and long... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: Equine veterinary journal Volume: 21 ISSN: 0425-1644 ISO Abbreviation: Equine Vet. J. Publication Date: 1989 Jan |
Date Detail:
|
Created Date: 1989-04-20 Completed Date: 1989-04-20 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 0173320 Medline TA: Equine Vet J Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 39-44 Citation Subset: IM |
Affiliation:
|
John M. Dalton Research Center, University of Missouri, Columbia 65211. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Blood Gas Analysis / veterinary Blood Pressure Catheters, Indwelling / veterinary Electrolytes / blood Heart / physiology* Heart Rate Hemodynamics* Horses / physiology* Lactates / blood Physical Exertion* Stroke Volume Ventricular Function |
| Grant Support | |
ID/Acronym/Agency:
|
F32-HL06999/HL/NHLBI NIH HHS; R01-HL29007/HL/NHLBI NIH HHS; T32-HL07187/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
|
0/Electrolytes; 0/Lactates |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Interactions between chloramphenicol, acepromazine, phenylbutazone, rifampin and thiamylal in the ho...
Next Document: Effect of freeze-drying on measurements of pH in biopsy samples of the middle gluteal muscle of the ...