Background: Despite increased focus on cardiac arrhythmias in horses, the nature and prevalence is still poorly described. Case reports suggest that arrhythmias occurring secondary to systemic disease are seen more commonly in the clinic than arrhythmias caused by cardiac disease. The aim of this...

The electrocardiographic study was made in 100 healthy showjumping horses, with ages between 4 and 19 year-old, being 61 males and 39 females, with mean bodyweight of 516.3 kg. A mean heart rate of 40.20±13.33 bpm was observed, and the most common cardiac rhythm was sinus rhythm (56%). Alterations...

The influence of atrioventricular block (AV-block) on trace element status of horse hair was studied. 25 trace elements (Al, Br, Ca, Cl, Co, Cu, Cr, Fe, Hg, K, Mg, Mn, Na, Nb, Ni, P, Pb, Rb, S, Se, Si, Sr, Ti, Y and Zn) in mane hair and serum of 36 male riding horses (AV-1, n=5; AV-2, n=9; control, ...

Cardiac arrhythmias, caused by disorders in the generation and transmission of cardiac impulses, is included among the heart disorders that cause inefficient blood circulation. The most commonly-used method for diagnosing this disorder is electrocardiography. In this study, we aimed to identify and ...

Reasons for performing study: N-butylscopolammonium bromide (NBB) and xylazine are commonly used medications for the treatment of spasmodic colic and other forms of abdominal pain in horses. Both NBB and xylazine exert significant effects on the cardiovascular system and other vital systems of ...

Observations: Two healthy obese, seven-year-old, female Rottweilers weighing 40 and 57 kg were submitted for cranial cruciate repair. They were premedicated with intravenous methadone (0.1 mg kg^-1) and acepromazine (0.01 and 0.02 mg kg^-1). Anesthesia was induced with propofol (3.6 and 2.5 mg kg^-1)...

The influence of parasympathetic tone was investigated on the arrhythmogenicity of graded dobutamine infusions in horses anaesthetized under clinical conditions. Six horses were used in 9 trials. Two consecutive series of graded dobutamine infusions were given i.v. each continuous graded dobutamine ...

Forty electrocardiographic recordings were made from 20 mares, geldings and stallions of different breeds and ages at rest and 15 minutes after i.m. injection of 2 mg/kg of xylazine in a 10% solution. Amplitude and duration of recording were compared, mainly in lead II. No differences were observed ...

Horses injected i/v with detomidine at 10, 20 or 40 µg/kg body weight became sedated after 1-8 min and the effect lasted for 40-120 min, depth and duration depending on dose. Heart rate increased within 5 min of injection. The ECG showed second-degree atrioventricular and sinoatrial block, and...

Results from a thorough analysis of electrocardiograms in 26 healthy horses at rest and during exercise were used to establish a standard curve of heart rate at rest, during the exercise test of 20 min and the recovery period of 30 min. Also examined was the dependence of the P-, PQ-, QRS-, QT- and ...