Training-induced changes of reference vectors in the QRS complex of the EKG of young trotting horses
Grauerholz, H.; Jaeschke, G.
Berliner und Munchener Tierarztliche Wochenschrift 103(10): 329-335
1990
ISSN/ISBN: 0005-9366 PMID: 2248611 Document Number: 349203
After the onset of training ("breaking") in young standardbred horses within continuing investigations changes of vectors in the QRS-complex were considered. These changes accomplished in two stages. Mainly within the first three months of training the vector R (VR) in limb leads changed to the left and to caudal and dorsal. In a second interval between five and seven months after breaking the vector S (VS) changed to cranial. As main cause the different character of training in both phases is discussed. Additional indicators of age- or development-related causes were not found.