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Echocardiographic comparison of left ventricular dimensions and function after standardized treadmill exercise in trained and untrained healthy warmblood horses

Published online by Cambridge University Press:  09 March 2007

Heidrun Gehlen ,
Silke Marnette ,
Karl Rohn ,
Franz Ellendorff  and
Peter Stadler
Heidrun Gehlen*
Affiliation:
The Clinic for Horses, University of Veterinary Medicine Hanover, 30173 Hanover, Germany
Silke Marnette
Affiliation:
The Clinic for Horses, University of Veterinary Medicine Hanover, 30173 Hanover, Germany
Karl Rohn
Affiliation:
Department of Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hanover, 30173 Hanover, Germany
Franz Ellendorff
Affiliation:
Institute for Animal Science Mariensee, Federal Agricultural Research Centre, 31535 Neustadt, Germany
Peter Stadler
Affiliation:
The Clinic for Horses, University of Veterinary Medicine Hanover, 30173 Hanover, Germany
*
*[email protected]
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Abstract

The purpose of the present study was to determine the influence of fitness on cardiac function, particularly on left ventricular function parameters. Fifteen healthy ‘three-day event’ warmblood horses were examined at rest and immediately after high-speed treadmill exercise (3% incline, 3 min 1.8 m s−1, 3 min 4 m s−1, 3 min 5 m s−1, 3 min 6 and 3 min 7 m s−1, 1.5 min 8 m s−1). Horses were divided into two groups. Group 1 consisted of nine conditioned horses and group 2 included six unconditioned horses. Left ventricular dimensions and function were acquired using standardized echocardiographic indices. To assess the level of fitness, heart rate and blood lactate concentration were determined at rest and immediately after exercise. The group of conditioned horses showed a significantly lower blood lactate concentration (mean value 2.39 mmol l−1) after high-speed treadmill exercise than did the group of unconditioned horses (mean value 3.81 mmol l−1), which clearly revealed the difference in fitness between the two groups. During exercise the heart rate was not significantly different between both groups. Only in the recovery phase did the trained horses show a significant faster decrease in heart rate than did the untrained horses. Mean heart rate during echocardiography immediately after exercise (within the first 2 min) was 105 bpm in the group of trained horses and 113 bpm in the group of untrained horses.Within each group of horses, several echocardiographic parameters differed significantly between resting values and values after treadmill exercise. Particularly, in the group of trained horses, 17 out of 30 echocardiographic parameters (most diastolic) differed significantly between rest and exercise. In the group of untrained horses, only six out of 30 parameters were significantly different. At rest, left ventricular diameter at the apex cordis, left ventricular free wall at papillary muscle level, left ventricular volume and stroke volume, as well as fractional shortening (at the apex cordis and at papillary muscle level) were significantly different between both groups. After treadmill exercise comparison of echocardiographic parameters of the conditioned to those of the unconditioned animals showed no significant differences. In the present study, data have been provided for stress echocardiography in conditioned and unconditioned warmblood horses without any disorders of the cardiovascular system.

Keywords

warmblood horsesheart ratestress echocardiographyfitness leveltreadmill exercise, three-day event
Type
Research Article
Information
Equine and Comparative Exercise Physiology , Volume 3 , Issue 1 , February 2006 , pp. 3 - 11
Copyright
Copyright © Cambridge University Press 2006

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References

1SampsonSN, , Tucker, RL and Bayly, WM (1999). Relationship between VO 2max, heart score and echocardiographic measurments obtained at rest and immediately following maximal exercise in Thoroughbred horses. Equine Veterinary Journal Supplements 30: 190–194.CrossRefGoogle Scholar
2Reef, VB, Maxson, AD and Lewis, M (1994). Echocardiographic and ECG changes in horses following exercise. Proceedings of the American College of Veterinary Internal Medicine pp. 256–258.Google Scholar
3Reef, VB (1997). Electrocardiography and echocardiography in the exercising horse. In: Current Therapy in Equine Medicine. Robinson, NE (ed.), Philadelphia, PA: W.B. Saunders pp. 234–239.Google Scholar
4Reef, VB (2001). Stress echocardiography and its role in performance assessment. Veterinary Clinics of North America: Equine Practice 17: 179–189.Google ScholarPubMed
5Sheikh, KH, Bengston, JR, Helmy, S, Juarez, C, Burgess, R et al. (1990). Relation of quantitative coronary lesion measurments to the development of exercise-induced ischemia assessed by exercise echocardiography. Journal of the American College of Cardiology 15: 1043–1051.CrossRefGoogle Scholar
6Bertone, JJ, Paull, KS, Wingfield, WE and Boon, JA (1987). M-mode echocardiographs of endurance horses in the recovery phase of long-distance competition. American Journal of Veterinary Research 48: 1708–1712.Google ScholarPubMed
7Pelliccia, A, Maron, BJ, Spataro, A, Proschan, MA and Spirito, P (1991). The upper limit of physiologic cardiac hypertrophy in highly trained elite athletes. The New England Journal of Medicine 324: 295–301.CrossRefGoogle ScholarPubMed
8Colan, SD, Sanders, SP and Borow, KM (1987). Physiological hypertrophy: effects on left ventricular systolic mechanics in athletes. Journal of the American College of Cardiology 9: 776–784.CrossRefGoogle ScholarPubMed
9Evans, DL and Rose, RJ (1988). Cardiovascular and respiratory responses to submaximal exercise training in the Thoroughbred horse. Pflügers Archive European Journal of Physiology 411: 316–321.CrossRefGoogle ScholarPubMed
10Foreman, H, Bayly, WM, Grant, BD and Gollnick, PD (1990). Standardized exercise test and daily heart rate response of Thoroughbreds undergoing conventional race training and detraining. American Journal of Veterinary Research 51: 914–920.CrossRefGoogle ScholarPubMed
11Hiraga, A, Kai, M, Kubo, K and Susano, S (1997). The effect of training intensity on cardiopulmonary function in 2-years-old Thoroughbred horses. Journal of Equine Science 8: 75–80.CrossRefGoogle Scholar
12Stadler, P, Rewel, A and Deegen, E (1993). Die M mode echocardiography in dressage- and showjumping horses of class ‘S’ and in untrained horses. Journal of Veterinary Medicine A 40: 292–306.CrossRefGoogle Scholar
13Sleepers, MM, Kearns, CF and McKeever, KH (2002). Chronic clenbuterol administration negatively alters cardiac function. Medicine and Science in Sports and Exercise 34: 643–650.Google Scholar
14Patteson, MW, Gibbs, C, Wotton, RP and Cripps, PJ (1995). Echocardiographic measurements of cardiac dimensions and indices of cardiac function in normal adult Thoroughbred horses. Equine Veterinary Journal Supplements 19: 18–27.CrossRefGoogle Scholar
15Gehlen, H, Bubeck, K and Stadler, P (2003). Pulmonary wedge pressure and heart rate measurements for extension of left atrial function diagnostics during standardized treadmill exercise. Deutsche Tierärztliche Wochenschrift 110: 269–308.Google ScholarPubMed
16Straub, R, Isler, R and Gysin, J (1984). Parameter zur Beurteilung der Ausdauer des Pferdes. Tierärztliche Praxis 12: 499–504.Google Scholar
17Rose, RJ, Allen, JR, Hodgson, DR, Stewart, JH and Chan, W (1983). Response to submaximal treadmill exercise and training in the horse: changes in haematology, atrial blood gas and acid base measurements, plasma biochemical values and heart rate. Veterinary Record 113: 612–618.Google Scholar
18Winer, BJ, Brown, DR and Michels, KM (1971). Statistical principles in Experimental Design. New York: McGraw-Hill, pp. 752–812.Google Scholar
19Young, LE (1999). Cardiac response to training in 2-year-old Thoroughbreds: an echocardiographic study. Equine Veterinary Journal Supplements 30: 195–198.CrossRefGoogle Scholar
20Kriz, NG, Hodgson, DR and Rose, RJ (2000). Changes in cardiac dimensions and indices of cardiac function during deconditioning in horses. American Journal of Veterinary Research 61: 1553–1560.CrossRefGoogle ScholarPubMed
21Marsland, WP (1968). Heart rate response to submaximal exercise in Standardbred horse. Journal of Applied Physiology 24: 98–101.CrossRefGoogle ScholarPubMed
22Physick-Sheard, PW (1985). Cardiovascular response to exercise and training in the horse. Veterinary Clinics of North American Equine Practice 1: 383–417.CrossRefGoogle ScholarPubMed
23Huonker, M, Halle, M and Keul, J (1996). Structural and functional adaptations of the cardiovascular system by training. International Journal of Sports Medicine 17: 164–172.CrossRefGoogle ScholarPubMed
24Pierard, LA, Serruys, PW, Roelandt, J and Meltzer, RS (1987). Left ventricular function at similar heart rates during tachycardia induced by exercise and atrial pacing: an echocardiographic study. British Heart Journal 57: 154–160.CrossRefGoogle ScholarPubMed
25Cohn, JN, Ferrari, R and Sharpe, N (2000). Cardiac remodeling-concepts and clinical implications: a consensus paper from an international forum on cardiac remodelling. Journal of the American College of Cardiology 35: 569–582.CrossRefGoogle Scholar
26Rowland, T, Unnithan, V, Fernhall, B, Baynard, T and Lange, C (2002). Left ventricular response to dynamic exercise in young cyclists. Medicine and Science in Sports and Exercise 34: 637–642.Google ScholarPubMed
27Jensen-Urstad, M, Bouvier, F, Nejat, M, Saltin, B and Brodin, LA (1998). Left ventricular function in endurance runners during exercise. Acta Physiologica Scandinavica 164: 167–172.CrossRefGoogle ScholarPubMed
28Ohmura, H, Hiraga, A, Matsui, A, Aida, H, Inoue, Y, Asai, Y and Jones, JH (2002). Physiological response of young Thouroughbreds during their first year of race training. Equine Veterinary Journal Supplements 34: 140–146.CrossRefGoogle Scholar
29Brandao, MU, Wajngarten, M, Rondon, E, Giorgi, MC, Hironaka, F and Negaro, CE (1993). Left ventricular function during dynamic exercise in untrained and moderately trained subjects. Journal of Applied Physiology 75: 1989–1995.CrossRefGoogle ScholarPubMed
30Nixon, JV, Wright, AR, Porter, TR, Roy, V and Arrowood, JA (1991). Effects of exercise on left ventricular diastolic performance in trained athletes. American Journal of Cardiology 68: 945–949.CrossRefGoogle ScholarPubMed
31Di Bello, V, Santoro, G, Talarico, L, Di Muro, C, Caputo, MT et al. (1996). Left ventricular function during exercise in athletes and sedentary men. Medicine and Science in Sports and Exercise 28: 190–196.CrossRefGoogle ScholarPubMed
32Fagard, RH (1992). Impact of different sports and training on cardiac structure and function. Cardiology Clinics 10: 241–256.CrossRefGoogle ScholarPubMed
33Marr, CM, Bright, JM, Marlin, DJ, Harris, PA and Roberts, CA (1999). Pre-and post-exercise echocardiography in horses performing treadmill exercise in cool and hot/humid conditions. Equine Veterinary Journal Supplements 30: 131–136.CrossRefGoogle Scholar
34Durando, MM, Reef, VB and Birks, EK (2002). Right ventricular pressure dynamics during exercise: relationship to stress echocardiography. Equine Veterinary Journal Supplements 34: 472–477.CrossRefGoogle Scholar
35Gehlen, H, Marnette, S, Rohn, K, Kreienbrock, L and Stadler, P (2005). Day to day variability of left ventricular echocardiographic parameters by repeated measurments at 3 days in trained and untrained warmblood horses. Deutsche Medizinische Wochenschrift 112: 48–54.Google ScholarPubMed