Relationship between QRS‐duration (heart score) and racing performance in trotters

Nielsen, K.; Vibe-Petersen, G

doi:10.1111/j.2042-3306.1980.tb02315.x

Cited by 21 publications

(12 citation statements)

References 4 publications

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“…Because of the low number of stallions in the study group, no inference could be made regarding stallions or male horses in general. However, the literature suggests that the QRS duration in stallions exceeds those of mares by 5–10 ms , a difference that is similar in magnitude to the mean difference in QRS duration of 6 ms found between mares and geldings in this study. This also corresponds to studies in people, showing that the QRS duration is significantly longer in men than in women .…”

Section: Discussionsupporting

confidence: 85%

Assessment of systolic and diastolic function in clinically healthy horses using ambulatory acoustic cardiography

Zuber

Züber

Schwarzwald

2018

Equine Veterinary Journal

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Overnight Audicor recordings are feasible in horses. Combining ambulatory ECG and phonocardiography allows noninvasive, continuous assessment of variables representing systolic and diastolic cardiac function. ECG rhythm analyses require over-reading by a specialist, but acoustic cardiography variables are based on automated algorithms independent of examiner input. Further studies are required to establish the clinical value of acoustic cardiography in horses.

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Section: Discussionsupporting

confidence: 85%

Assessment of systolic and diastolic function in clinically healthy horses using ambulatory acoustic cardiography

Zuber

Züber

Schwarzwald

2018

Equine Veterinary Journal

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“…Não houve diferença estatística entre os animais segundo a faixa etária, talvez porque os animais estudados estavam acima de quatro anos, faixa etária próxima da que alguns autores descrevem como tendo pouca alteração no escore cardíaco (Nielsen & Vibe-Petersen 1980).…”

Section: Resultsunclassified

Estudo eletrocardiográfico de equinos de salto sadios

Diniz¹,

Michima²,

Fernandes

2011

Pesq. Vet. Bras.

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355Pesq. Vet. Bras. 31(4): 355-361, abril 2011 RESUMO.-Avaliou-se o eletrocardiograma de 100 equinos sadios praticantes de hipismo clássico modalidade salto, com idades entre 4 e 19 anos, sendo 61 machos e 39 fême-as, com média de 516,3 kg. Observou-se frequência cardí-aca média de 40,20 ±13,33 bpm, sendo o ritmo cardíaco mais freqüente o sinusal (56%). As alterações de ritmo cardíaco estiveram presentes em 38% dos animais estudados, sendo a mais presente o marcapasso migratório (22%), seguido de bloqueio atrioventricular de 2º grau (4%), bloqueio atrioventricular de 1º grau (3%), contração ventricular prematura (2%), contração atrial prematura (1%). Não se observou correlação entre as variáveis estudadas (freqüên-cia cardíaca, ritmo e arritmias) e a capacidade atlética, a idade e o sexo. O escore cardíaco após analise estatística não diferiu entre os grupos quanto ao desempenho atlético, a faixa etária e o sexo. O escore cardíaco, nesta amostra, não se mostrou um parâmetro confiável para se predizer o futuro atlético ou o nível de treinamento do eqüino. TERMOS DE INDEXAÇÃO: Eletrocardiografia, escore cardía-co, equinos. INTRODUÇÃOA cardiologia veterinária vem assumindo grande importân-cia no universo da medicina esportiva principalmente em eqüinos, não só pela detecção das alterações cardíacas e tratamentos adequados, mas também por estabelecer prognósticos tanto na vida atlética como na sobrevida, racionalizando a campanha atlética ou a atividade a que se destina o animal. Porém, o uso da eletrocardiografia ainda desperta dúvidas, pois a orientação, amplitude e duração das ondas do ECG dependem de vários fatores, incluindo idade do animal, raça, sexo, derivação examinada e até mesmo condicionamento físico, e ainda, a falta de dados específicos para cada raça ou esporte (Reef 1992).O eletrocardiograma é o método diagnóstico mais adequado para a confirmação dessas arritmias (Belgrave 1990 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 in cardiac rhythm were observed in 38% of the animals, as wandering pacemaker (22%), second degree atrioventricular block (4%), first degree atrioventricular block (3%), ventricular premature contraction (2%), atrial premature contraction (1%). There was no relationship between the variables (heart rate, rhythm and arrhythmias) and the athletic performance, age and sex. The heart score data obtained after statistical analysis were not different concerning the athletic performance, age or sex. Therefore, heart score, in this sample, did not appear to be a confident parameter to predict the athletic future or the training level of the individual horse.

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“…It is known that QRS interval increases with age and training (15). In the experimental horses, the authors did not notice the effects of age, but the impact of training could not be examined, because of the similar level of activity of the group.…”

Section: Discussionmentioning

confidence: 93%

Physiological ECG Value for Polish Half-Bred Anglo-Arab Horses

2012

Bulletin of the Veterinary Institute in Pulawy

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The electrocardiographic examination was performed in 33 training horses (2-16 years of age, 11 males and 22 females). Einthoven and precordial leads (I, II, III, aVR, aVL, aVF, CV 1 , CV 2 ,CV 4 ) were used. The ECG was performed in resting horses and immediately after exercise (10 min walk, 15 min trot, 10 min canter) using a portable Schiller AT-1 3-channel electrocardiograph, with a paper speed of 25 mm sec -1 and a sensitivity of 10 mm . mV -1 . The heart rate, wave amplitudes, and duration time were estimated manually. All horses presented a significant increase in heart rate after exercise (rest 43.83 ±10.33 vs. exercise 73.2 ±14.8). QT intervals were significantly shortened in most of the leads. In resting horses, all P waves in the lead I were positive and almost all II, III and CV 4 leads were positive. Simple negative P wave dominated in aVR and only simple negative T wave was found in the leads I. The biphasic shape was observed. After exercise, the amplitude of P and T waves rose, however, clear changes were not observed in wave polarisation and form. In the absence of specific racial characteristics of the electrocardiogram in the Polish AngloArabians, electrocardiographic findings can be interpreted according to ECG standards adopted for horses.Key words: Anglo-Arab horses, heart, ECG physiological values.Though ECG method is one of the oldest cardiovascular diagnostic procedures, there is scarce information on electrocardiographic values in different horse breeds. In literature, the need to conduct electrocardiographic studies in horses considering racial specificity of equine ECG is emphasised (5, 10). ECG recordings provide less information in horses in comparison to human and other animal species. This is connected with wide-spread rapidly conducting Purkinje fibers in the ventricles in horses and solipedes. Individual Purkinje fibers activate the adjacent cells of heart muscle, causing its rapid depolarisation and resulting in simultaneous contraction.The aim of the study was to estimate normal ECG values for Polish Anglo-Arab horses. Material and MethodsThe study was carried out on 33 healthy halfbred Anglo-Arab horses of both sexes (11 males, 22 females), weighing 480-550 kg. The horses were aged between 2 and 16 years. All horses were subjected to a regular training and reared under the ordinary management. The horses were examined in the stable.No abnormalities were detected in clinical examination of the horses. Einthoven and precordial leads (I, II, III, aVR, aVL, aVF, CV 1 , CV 2 , CV 4 ) were used in ECG examination.Alligator clips fixed to the electrocardiographic leads were attached directly to the skin. The sites of the attachment of electrodes were cleaned with alcohol but not shaved and electrode paste was applied. The electrodes were placed over the elbow and knee and on the chest: right and left 5 intercostal spaces (i.c.s.), on the humeral join line, and on the sternum on the ventral midline directly over the xiphoid cartilage approximately 5 i.c.s. The forelimbs were ...

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Relationship between QRS‐duration (heart score) and racing performance in trotters

Cited by 21 publications

References 4 publications

Assessment of systolic and diastolic function in clinically healthy horses using ambulatory acoustic cardiography

Assessment of systolic and diastolic function in clinically healthy horses using ambulatory acoustic cardiography

Estudo eletrocardiográfico de equinos de salto sadios

Physiological ECG Value for Polish Half-Bred Anglo-Arab Horses

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