Evolution of the electrocardiogram in young dogs during the first 12 weeks of life

Trautvetter, E.; Detweiler, D. K.; Patterson, D. F.

doi:10.1016/s0022-0736(81)80008-8

Cited by 13 publications

(6 citation statements)

References 19 publications

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“…Actually, the prominent Q-wave and increase in Q/R ratio were also detected in some of the CXMD J dogs at around 2 months of age (Fig. 1C), but it is difficult to evaluate the degree of the Q/R ratio increase before 3 months of age because the QRS vector is almost exclusively directed to the right and varies significantly in the weeks after birth [33]. A previous report described GRMD dogs ranging from 6 months to > 2 years as having deep Q-waves and increased Q/R ratios in leads II, III, and aVF [23].…”

Section: Discussionmentioning

confidence: 99%

Cardiac involvement in Beagle-based canine X-linked muscular dystrophy in Japan (CXMDJ): electrocardiographic, echocardiographic, and morphologic studies

Yugeta

Urasawa

Fujii

et al. 2006

BMC Cardiovasc Disord

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Background: Cardiac mortality in Duchenne muscular dystrophy (DMD) has recently become important, because risk of respiratory failure has been reduced due to widespread use of the respirator. The cardiac involvement is characterized by distinctive electrocardiographic abnormalities or dilated cardiomyopathy, but the pathogenesis has remained obscure. In research on DMD, Golden retriever-based muscular dystrophy (GRMD) has attracted much attention as an animal model because it resembles DMD, but GRMD is very difficult to maintain because of their severe phenotypes. We therefore established a line of dogs with Beagle-based canine X-linked muscular dystrophy in Japan (CXMD J ) and examined the cardiac involvement.

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Section: Discussionmentioning

confidence: 99%

Cardiac involvement in Beagle-based canine X-linked muscular dystrophy in Japan (CXMDJ): electrocardiographic, echocardiographic, and morphologic studies

Yugeta

Urasawa

Fujii

et al. 2006

BMC Cardiovasc Disord

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“…The orthogonal modified lead system X, Y and Z was used to determine the spatial direction of the mean QRS-T vectors (figure 3). This system consists in that Lead X= lead I: right (-) to left (+); Lead Y= lead aVF: cranial (-) to caudal (+); Lead Z= lead V10: ventral (-) to dorsal (+) as described by Hellerstein and Hamlin (1960); Detweiller and Patterson (1965); Tilley (1985); Trautvetter et al (1981).…”

Section: Methodsmentioning

confidence: 99%

The polarity and shape of the T wave in lead V-10 in Chihuahuas

Almeida,

Santos

et al. 2023

RSD

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The T-wave in the canine electrocardiogram can be positive, negative, or biphasic in most leads, while his amplitude should not be greater than 25% of the R wave. However, since the 1960’s persists controversy regarding the polarity of the T wave in Chihuahuas when compared to other canine breeds. This study aimed to clarify the polarity and shape of the T-wave in the lead V-10 in a group of healthy Chihuahuas. Retrospective eletrocardiographic study with a sample of 20 private client-owned Chihuahuas. The conclusion was that the polarity of the T-wave is usually negative and the shape is asymmetric, type “slow-fast/down-up”, in all dogs studied.

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“…In contrast to human infants, in which the T wave in the right precordial leads are usually positive the first 24 h after birth, 14 the T waves in V10 produced in normal puppies are often negative. 16 In one study, 16 healthy pups were compared to 20 other pups that were normal littermates from dog families with congenital heart disease. 16 In the first group, T waves in V10 were all negative like in adult dogs.…”

Section: Article In Pressmentioning

confidence: 99%

“…16 In one study, 16 healthy pups were compared to 20 other pups that were normal littermates from dog families with congenital heart disease. 16 In the first group, T waves in V10 were all negative like in adult dogs. In 82% of the second group, T waves in V10 at birth were positive and at 12 weeks of age this pattern was retained in 10.5% of these pups.…”

Section: Article In Pressmentioning

confidence: 99%

The T wave in the V10 precordial electrocardiographic lead is negative in healthy Chihuahua dogs

Dijkstra

Szatmári

2009

Journal of Veterinary Cardiology

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Objectives: The T wave polarity in the V10 precordial electrocardiographic (ECG) lead in Chihuahuas is described as positive in the veterinary literature. The aim of this study was to investigate the polarity of the T wave in the V10 precordial ECG lead in clinically healthy Chihuahuas. Our null hypothesis was that healthy Chihuahuas have a negative T wave in V10. Animals, materials and methods: In this prospective study, 67 healthy breederowned Chihuahuas were used. A physical examination, 10-lead ECG and an echocardiogram were performed on each dog. Results: No cardio-respiratory abnormalities were revealed in any of the otherwise healthy dogs. Three out of 67 ECGs were of insufficient quality because of baseline artifacts due to movement of the animal. Two other ECGs showed a nearly iso-electric T wave in the V10 lead. The remaining 62 ECGs showed negative T waves in the V10 lead. Right ventricular hypertrophy was excluded with echocardiography in all dogs. Conclusion: In contrast to previous reports, we found that healthy Chihuahuas have negative T wave in the V10 precordial ECG lead. ª

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Evolution of the electrocardiogram in young dogs during the first 12 weeks of life

Cited by 13 publications

References 19 publications

Cardiac involvement in Beagle-based canine X-linked muscular dystrophy in Japan (CXMDJ): electrocardiographic, echocardiographic, and morphologic studies

Cardiac involvement in Beagle-based canine X-linked muscular dystrophy in Japan (CXMDJ): electrocardiographic, echocardiographic, and morphologic studies

The polarity and shape of the T wave in lead V-10 in Chihuahuas

The T wave in the V10 precordial electrocardiographic lead is negative in healthy Chihuahua dogs

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