The canine T wave: a retrospective analysis on qualitative and quantitative T wave variables obtained in 129 healthy dogs and proposed reference intervals

Romito, Giovanni; Castagna, Prisca; Pelle, N. G.; Testa, F.; Sabetti, Maria Chiara; Cipone, Mario

doi:10.1016/j.jvc.2022.06.003

Cited by 6 publications

(8 citation statements)

References 42 publications

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“…The agreement between the two devices for each quantitative variable is reported in Table 2 and Figure 3. With both devices, most of these variables were within the generic reference intervals, 25,26,[41][42][43] with the only exception being the QRS complex MEA, as a trend towards a left shift was observed with both devices. Indeed, with the st-ECG machine, the mean QRS complex MEA was 47.5 • (0 • −100 • ) and 31 of 75 (41.3%) dogs showed a left shift (median value of the QRS complex MEA among these subjects 32 • [0 • −39 • ]).…”

Section: Measurements Of Durations Amplitudes and Meamentioning

confidence: 77%

“…Both the ST segment and the T wave represent two ECG parameters traditionally neglected in the veterinary literature, whose clinical relevance has been highlighted in small animals in recent years [47][48][49][50] and whose reference intervals have recently been documented in dogs. 41,42 The interpretation of these parameters is essential for a complete ECG analysis, as ventricular repolarisation is as important as depolarisation. Regrettably, previous studies evaluating digital ECG devices did not analyse their accuracy in the assessment of these ECG components.…”

Section: Discussionmentioning

confidence: 99%

“…Another noteworthy result regards the degree of agreement in detection of ST segment deviation and assessment of T wave polarity. Both the ST segment and the T wave represent two ECG parameters traditionally neglected in the veterinary literature, whose clinical relevance has been highlighted in small animals in recent years 47–50 and whose reference intervals have recently been documented in dogs 41,42 . The interpretation of these parameters is essential for a complete ECG analysis, as ventricular repolarisation is as important as depolarisation.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequently, analysis of the main ECG variables was performed as previously described. 26,41,42 Specifically, these included the duration, amplitude and MEA in the frontal plane of the P-wave; the PQ interval duration; the duration and MEA of the QRS complex; the Q wave, R wave and S wave amplitudes; the presence/absence of ST segment deviation and its amplitude; the polarity and amplitude of the T wave; and the duration of the QT interval. Three representative consecutive beats were used to measure various ECG variables, and the results were averaged for each variable.…”

Section: Ecg Analysismentioning

confidence: 99%

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Evaluating the accuracy of a six‐lead smartphone‐based electrocardiographic device compared with standard electrocardiography in brachymorphic dogs

Romito

Castagna²,

Sabetti

et al. 2023

Veterinary Record

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BackgroundNo previous study has evaluated the accuracy of a six‐lead smartphone‐based electrocardiographic (s‐ECG) device in dogs.MethodsThis was a prospective multicentre study. Patients referred for cardiologic consultation were selected. In each patient, a 30‐second electrocardiogram was simultaneously acquired with a novel six‐lead s‐ECG and a standard six‐lead ECG machine (st‐ECG). A board‐certified cardiologist evaluated each recording. Nineteen ECG variables, including heart rate and rhythm, as well as quantitative and qualitative features of waves, segments and intervals, were analysed. Agreement between s‐ECG and st‐ECG was evaluated using Cohen's kappa coefficient and the Bland–Altman test.ResultsSeventy‐five dogs were enrolled, and 140 ECG tracings were analysed. There was perfect agreement between the two methodologies for heart rate and rhythm classification, both in dogs with sinus rhythm and those with pathological rhythms. Although some disagreement was found when comparing measurements of quantitative variables obtained with the s‐ECG and the st‐ECG, none of the differences was of clinical relevance.LimitationsThe sample size was limited, and the interobserver variability was not analysed.ConclusionThe six‐lead s‐ECG studied herein is comparable to the st‐ECG for heart rate and rhythm assessment, and seems clinically acceptable for the interpretation of waves, segments and intervals in dogs.

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Section: Measurements Of Durations Amplitudes and Meamentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Ecg Analysismentioning

confidence: 99%

See 2 more Smart Citations

Evaluating the accuracy of a six‐lead smartphone‐based electrocardiographic device compared with standard electrocardiography in brachymorphic dogs

Romito

Castagna²,

Sabetti

et al. 2023

Veterinary Record

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“…The T waves analyzed in this study follow the qualitative and quantitative features of the normal canine population T waves ( 80 ). The T wave is one the most variable waves in the electrocardiogram and may change under several pathological conditions ( 81 ) or in association with altered autonomic tone, with variable and opposing effects reported ( 82 – 84 ).…”

Section: Discussionmentioning

confidence: 91%

Comparison of the effects of propofol and alfaxalone on the electrocardiogram of dogs, with particular reference to QT interval

Casoria,

Greet,

Auckburally

et al. 2024

Front. Vet. Sci.

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Cardiac electrical activity is often altered by administration of anesthetic drugs. While the effects of propofol in this regard have previously been described in dogs, to date, there are no reports of the effect of alfaxalone. This study investigated the impact of both propofol and alfaxalone on the ECG of 60 dogs, after premedication with acepromazine and methadone. Heart rate increased significantly in both groups. The PR and QRS intervals were significantly increased following propofol while with alfaxalone the QRS duration was significantly increased and ST segment depression was observed. The QT and JT interval were significantly shorter following induction with alfaxalone, but, when corrected (c) for heart rate, QTc and JTc in both groups were significantly greater following induction. When comparing the magnitude of change between groups, the change in RR interval was greater in the alfaxalone group. The change in both QT and JT intervals were significantly greater following alfaxalone, but when QTc and JTc intervals were compared, there were no significant differences between the two drugs. The similarly increased QTc produced by both drugs may suggest comparable proarrhythmic effects.

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Myocardial injury in dogs: a retrospective analysis on etiological, echocardiographic, electrocardiographic, therapeutic, and outcome findings in 102 cases

Romito,

Palatini,

Sabetti

et al. 2024

Journal of Veterinary Cardiology

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The canine T wave: a retrospective analysis on qualitative and quantitative T wave variables obtained in 129 healthy dogs and proposed reference intervals

Cited by 6 publications

References 42 publications

Evaluating the accuracy of a six‐lead smartphone‐based electrocardiographic device compared with standard electrocardiography in brachymorphic dogs

Evaluating the accuracy of a six‐lead smartphone‐based electrocardiographic device compared with standard electrocardiography in brachymorphic dogs

Comparison of the effects of propofol and alfaxalone on the electrocardiogram of dogs, with particular reference to QT interval

Myocardial injury in dogs: a retrospective analysis on etiological, echocardiographic, electrocardiographic, therapeutic, and outcome findings in 102 cases

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