Unilateral atrial ectopic rhythm in a golden retriever

Background: Atrial ectopic rhythm is a type of supraventricular arrhythmia, originating in two distinct points in the atrialregion. In the electrocardiographic (ECG) tracing, it is represented by independent depolarizations of sinus P waves andectopic P waves. The occurrence of this disorder is rare, and the diagnosis criteria are the presence of the described waveswithin the basal rhythm. In humans, there have been reports related to severe heart failure with an unfavorable prognosis.The present report aimed to describe the clinical case of a dog with unilateral atrial ectopic rhythm without any underlying cardiac disorder.Case: A 8-year-old male golden retriever was brought to a veterinary clinic for a preoperative evaluation for lipoma removalin the right forelimb. On clinical examination, the owner stated that the patient was active, with no signs of easy fatigueor cough. The canine displayed normophagy, normodipsia, normoquezia, and normouria. On physical examination, hedemonstrated a lymphatic temperament with tachypnea. The temperature and capillary filling time were within the normalrange, with a normokinetic pulse. Cardiac auscultation revealed a mild grade I/VI murmur in mitral focus and an 80-bpmheart rate. Respiratory auscultation revealed the presence of harshy lung sounds. The cough reflex was positive; the Piparotetest, negative. The blood test showed no noticeable changes in blood count and serum biochemistry. Systemic systolicblood pressure was 120 mmHg. On radiographic examination, no evidence of heart or lung abnormalities were identified.After the clinical evaluation, an ECG examination was performed; a unilateral atrial ectopic rhythm was observed withdifferent frequencies between atrial and ventricular rhythm and with P (164°) and P waves (80°). On echocardiographic...(AU)

Unilateral atrial ectopic rhythm in a golden retriever

Background: Atrial ectopic rhythm is a type of supraventricular arrhythmia, originating in two distinct points in the atrialregion. In the electrocardiographic (ECG) tracing, it is represented by independent depolarizations of sinus P waves andectopic P waves. The occurrence of this disorder is rare, and the diagnosis criteria are the presence of the described waveswithin the basal rhythm. In humans, there have been reports related to severe heart failure with an unfavorable prognosis.The present report aimed to describe the clinical case of a dog with unilateral atrial ectopic rhythm without any underlying cardiac disorder.Case: A 8-year-old male golden retriever was brought to a veterinary clinic for a preoperative evaluation for lipoma removalin the right forelimb. On clinical examination, the owner stated that the patient was active, with no signs of easy fatigueor cough. The canine displayed normophagy, normodipsia, normoquezia, and normouria. On physical examination, hedemonstrated a lymphatic temperament with tachypnea. The temperature and capillary filling time were within the normalrange, with a normokinetic pulse. Cardiac auscultation revealed a mild grade I/VI murmur in mitral focus and an 80-bpmheart rate. Respiratory auscultation revealed the presence of harshy lung sounds. The cough reflex was positive; the Piparotetest, negative. The blood test showed no noticeable changes in blood count and serum biochemistry. Systemic systolicblood pressure was 120 mmHg. On radiographic examination, no evidence of heart or lung abnormalities were identified.After the clinical evaluation, an ECG examination was performed; a unilateral atrial ectopic rhythm was observed withdifferent frequencies between atrial and ventricular rhythm and with P (164°) and P waves (80°). On echocardiographic...

Dissociação atrial em cães da raça Labrador relato de caso / Atrial dissociation in Labrador dogs - case repor

Este artigo descreve dois casos de dissociação atrial em cães da raça Labrador. A dissociação atrial é uma arritmia cardíaca muito rara tanto em seres humanos quanto em cães sendo caracterizada pela presença de dois ritmos simultâneos e independentes, capazes de despolarizar diferentes partes dos átrios, sem causar interferência entre eles, com apenas um deles se propagando para os ventrículos. A dissociação atrial não produz sinais clínicos e seu diagnóstico é feito através do eletrocardiograma. Parasístole atrial, ondas P bloqueadas, ondas U, artefatos como tremores musculares, contração diafragmática, batimentos cardíacos de outros indivíduos, artefatos respiratórios e problemas técnicos com o aparelho devem fazer parte do diagnóstico diferencial.(AU)

This paper describes the case of two Labrador dogs diagnosed with atrial dissociation. Atrial dissociation is a very rare cardiac arrhythmia in both human beings and dogs and it is characterized by two independent and simultaneous rhythm that are able to depolarize different portions of the atrium, with no cross-interference between them, and only one rhythm propagating to the ventricles. Atrial dissociation is an asymptomatic disease and the diagnosis in made through the electrocardiogram. Atrial parasístole, blocked P waves, U waves, artifact due to muscle shaking, diaphragm contraction, heart beats of other individuals, respiratory artifacts and technical issues with the device should be part of the differential diagnosis.(AU)

Dissociação atrial em cães da raça Labrador – relato de caso / Atrial dissociation in Labrador dogs - case repor

Este artigo descreve dois casos de dissociação atrial em cães da raça Labrador. A dissociação atrial é uma arritmia cardíaca muito rara tanto em seres humanos quanto em cães sendo caracterizada pela presença de dois ritmos simultâneos e independentes, capazes de despolarizar diferentes partes dos átrios, sem causar interferência entre eles, com apenas um deles se propagando para os ventrículos. A dissociação atrial não produz sinais clínicos e seu diagnóstico é feito através do eletrocardiograma. Parasístole atrial, ondas P bloqueadas, ondas U, artefatos como tremores musculares, contração diafragmática, batimentos cardíacos de outros indivíduos, artefatos respiratórios e problemas técnicos com o aparelho devem fazer parte do diagnóstico diferencial.

This paper describes the case of two Labrador dogs diagnosed with atrial dissociation. Atrial dissociation is a very rare cardiac arrhythmia in both human beings and dogs and it is characterized by two independent and simultaneous rhythm that are able to depolarize different portions of the atrium, with no cross-interference between them, and only one rhythm propagating to the ventricles. Atrial dissociation is an asymptomatic disease and the diagnosis in made through the electrocardiogram. Atrial parasístole, blocked P waves, U waves, artifact due to muscle shaking, diaphragm contraction, heart beats of other individuals, respiratory artifacts and technical issues with the device should be part of the differential diagnosis.