Med. Weter. 2018, 74 (9), 577-580
full text
URSZULA PASŁAWSKA, KATARZYNA MICHLIK, IZABELA JANUS,
ROBERT PASŁAWSKI, DOROTA ZYŚKO, AGNIESZKA NOSZCZYK-NOWAK |
Physiological values of ECG parameters
in Silesian horses |
The aim of this study was to establish the physiological ECG values in the Silesian horse and to compare
the results with literature data for other breeds of horses. This study was carried out on 31 healthy Silesian
horses (15 males and 16 females) aged 2-19 years. The ECG was carried out after an anamnesis and clinical
examination and without prior premedication or use of force, both of which could affect the ECG result.
The mean heart rate (HR) in the Silesian horses was 39 ± 8.1 beats per minute. In the majority of the leads,
P waves were single positive waves. Notched waves were present in 16-51% of the horses, bifid waves were
found less frequently, and biphasic P waves were seen least frequently. In the aVR lead, the P wave was most
commonly found to be single negative. The PQ interval ranged from 0.18 s in the CV1 lead to 0.29 s in the aVR
lead. Most often, the PQ interval lasted 0.24-0.28 s. The QRS duration ranged from 0.079 s in the CV1 lead to
0.099 s in lead III. The QRS duration was between 0.08 and 0.1 s. Generally, the T wave was single positive or
negative. It was biphasic only in the precordial leads. Unlike P waves, notched T waves were not found. The
ECG parameters in the Silesian horse do not differ from normal ECG values for other horse breeds of similar
weight. Specific features of the ECG in the Silesian horse are a frequent occurrence of additional R’ and S’
waves in the Einthoven leads and a relatively long supraventricular conduction time. |
Key words: ECG, horse, Silesian horses |