Abstract
To investigate the relationship of heart rate (HR) and ECG time intervals to body weight (BWT) in healthy horses and ponies. We hypothesized that HR and ECG time intervals are related to BWT. 250 healthy horses of >30 breeds; 5.5 (1-30) y [median (range)]; 479 (46-1018) kg. Prospective study. Standard base-apex ECGs were recorded while the horses were standing quietly in a box stall. Mean HR over 15 s was calculated and RR interval, PQ interval, QRS duration, and QT interval were measured by a single observer.QT was corrected for differences in heart rate using Fridericia's formula (QT(cf) = QT/(3)√RR). The relationship between ECG variables and BWT, age, sex, and RR interval was assessed using multivariate backward stepwise regression analyses. Goodness of fit of the model was improved when using log(BWT) compared to BWT. Body weight was overall the strongest predictor of HR and ECG time intervals. Therefore, only log(BWT) was included as an independent variable in the final model. The level of significance was p = 0.05. HR (R(2) = 0.21) showed a significant negative relationship and PQ (R(2) = 0.53), QRS (R(2) = 0.23), QT (R(2) = 0.14), and QT(cf) (R(2) = 0.02) showed significant positive relationships to log(BWT). Small equi...Continue Reading
References
Dec 1, 1975·Comparative Biochemistry and Physiology. A, Comparative Physiology·Y Jammes, P Bouverot
Oct 1, 1975·Respiration Physiology·J A OrrJ A Will
Jan 1, 1975·Journal of Electrocardiology·D D BussG E Bisgard
Jan 1, 1989·Equine Veterinary Journal·K S RughD G Hatfield
Feb 1, 1989·Nihon juigaku zasshi. The Japanese journal of veterinary science·K Matsui, S Sugano
Sep 10, 1988·The Veterinary Record·T Art, P Lekeux
Feb 1, 1985·Journal of the American College of Cardiology·F L Meijler
Oct 1, 1974·Nihon juigaku zasshi. The Japanese journal of veterinary science·H Sawazaki, H Hirose
Jul 1, 1983·Pacing and Clinical Electrophysiology : PACE·J S SarmaS G Melinte
Sep 1, 1993·Equine Veterinary Journal·V B Reef
Mar 23, 2000·Cardiovascular Research·T Opthof
May 3, 2001·Journal of Cardiovascular Electrophysiology·N G Boyle, J N Weiss
Sep 6, 2002·Journal of Cardiovascular Electrophysiology·Frits L MeijlerClaes Wassenaar
Oct 31, 2002·Equine Veterinary Journal. Supplement·M M DurandoE K Birks
May 17, 2003·Journal of Pharmacological and Toxicological Methods·Patrick Davey
Oct 27, 2004·Circulation·Sami F NoujaimJosé Jalife
Jan 3, 2006·Journal of Electrocardiology·Maria SejerstenGalen S Wagner
Apr 29, 2006·Journal of Cardiovascular Electrophysiology·Ilan GoldenbergWojciech Zareba
Jun 18, 2010·The Journal of Small Animal Practice·L FerasinC J L Little
Jul 17, 2010·Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology·Allison P LambRobert L Hamlin
Jul 29, 2010·Journal of Theoretical Biology·J FloresM López de Haro
May 27, 2011·Equine Veterinary Journal. Supplement·R BuhlL Barbesgaard
May 27, 2011·Equine Veterinary Journal. Supplement·L BarbesgaardC Meldgaard
Dec 6, 2011·Medical Engineering & Physics·John E Madias
Feb 5, 2016·The Onderstepoort Journal of Veterinary Research·John D GrewarAlan J Guthrie
Citations
Apr 2, 2016·Journal of Electrocardiology·Jay W MasonIain Strachan
Apr 14, 2016·Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology·P J PedersenR Buhl
Oct 4, 2014·Journal of Veterinary Cardiology : the Official Journal of the European Society of Veterinary Cardiology·Philip J PedersenDan A Klaerke
Sep 2, 2018·Equine Veterinary Journal·N ZuberC C Schwarzwald
Jun 28, 2013·Asian Pacific Journal of Cancer Prevention : APJCP·Zahra BahadoranBahram Rashidkhani
Jul 9, 2020·Journal of Veterinary Internal Medicine·Ignacio CorradiniJavier Engel-Manchado
Jun 6, 2013·Journal of Animal Science·L BrinkmannA Riek
Sep 10, 2020·Animals : an Open Access Journal From MDPI·Christina NagelJörg Aurich
Nov 29, 2020·Journal of Veterinary Internal Medicine·Djamila Berthoud, Colin C Schwarzwald
Jul 1, 2021·Journal of Animal Science and Technology·Kyung Eun LeeByung Sun Kim
Aug 8, 2021·Animals : an Open Access Journal From MDPI·Laura B HunterKevin J Stafford