Exercise training of dogs with myxomatous valve disease

ABSTRACT The present study has the objective of evaluating the effects of exercise training, using moderate intensity walking (60 to 80% of maximum heart rate), from 30 to 50 minutes, three times a week, in alternate days, during eight weeks, on heart rate variability in dogs with myxomatous valve disease (MVD). For that, 20 dogs in stages B1 (1), B2 (14) and C2 (5) of MVD (ACVIM classification) were divided into untrained control group (CG, n=9) and training group (TG, n=11), and assessed at baseline (T0), after four (T1) and eight weeks (T2). Only one B1 and five B2 dogs completed the training program. In the time domain, the rMSSD was greater in TG in T1 (155,5+42,07) and T2 (199,8+83,54) than CG (T1:91,17+35,79 and T2:88,17+57,51). In the frequency domain, the variable High Frequency (HF) increased in TG in T1 (30950+25810) and T2 (40300+33870) when compared to the CG (T1:19090+23210 and T2:18810+22200) and within the group TG in T2 in relation to T0 (29340+20950). The proposed walking protocol is concluded to have increased the rMSSD and HF variables in TG, representing an increase of the parasympathetic tonus, justifying the indication of this therapy in B1 and B2 stages of MVD

Comparison between conventional and computerized electrocardiography in cats

Foram analisados e comparados, os registros eletrocardiográficos (ECG) obtidos pelos métodos convencional (Cv), computadorizado (Cp) e pela leitura direta do registro computadorizado impresso (CpP) de 30 gatos adultos sem raça definida, clinicamente normais e distribuídos em dois grupos: grupo F (n=16 fêmeas) e grupo M (n=14 machos). Para a análise estatística, utilizou-se o teste t. Não foi observada diferença entre os grupos. Entre os métodos, foram observadas diferenças quanto à duração em milissegundos da onda P e do complexo QRS, especialmente em relação ao método computadorizado.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Partial rupture of the thigh adductor muscle in a dog: case report

ABSTRACT Muscle injuries are often reported in humans, but uncommon in dogs. The etiology is degenerative or traumatic, and traumatic is more common in athletes. The diagnosis is obtained by a combination of orthopedic physical examination and imaging diagnosis, such as ultrasonography. Therapy aims to optimize healing and avoid complications. The present study reports a case of partial rupture of thigh adductor muscle in a dog presenting acute lameness of the right pelvic limb. Swelling and pain in the medial region of the thigh was noticed. Ultrasound examination confirmed partial rupture of the thigh adductor muscle. The treatment included non-steroid anti-inflammatory, warm compresses, and rest. Ultrasound examinations were useful in this case to evaluate the progression of the lesion, which was rapid and satisfactory

Clinical and histopathological features of myocarditis in dogs with visceral leishmaniasis

Visceral leishmaniasis (VL) is a cosmopolitan parasitic zoonosis that can promote myocarditis and heart rate changes in canine and human hosts. Thus, histopathological aspects of the myocardium and clinical, hematological, biochemical, radiological and electrocardiographic data were evaluated in a group of 36 dogs naturally infected with VL (VLG) and compared to data from 15 non-infected dogs (CG=Control Group). A prevalence of asymptomatic dogs was present in the CG (100%) and polysymptomatic dogs in the VLG (66%). In addition, two dogs in the VLG demonstrated systolic murmurs in the mitral valve region: one with a II/VI intensity and the other with a III/VI intensity. The mean values of RBC, hemoglobin and hematocrit were lower in dogs in VLG and were associated with higher values of total protein, total leukocytes, neutrophils, creatine kinase overall (CK) and the CK-MB fraction (CK-MB). The absence of radiographic changes was accompanied by a predominance of respiratory sinus arrhythmia associated with episodes of migratory pacemaker and sinus arrest in dogs in VLG (75%), sinus rhythm in dogs in CG (60%) and decreased P wave amplitude in VLG electrocardiography. Mononuclear cell infiltration was detected in the myocardium of 77,8% of dogs in GVL and classified primarily as mild multifocal lymphohistioplasmacytic. Amastigotes were detected in only one dog, which did not allow the association between myocarditis and parasitism, although the myocardial lesions that were found constitute irrefutable evidence of myocarditis in the VLG dogs, accompanied by lenient electrocardiographic changes compared to CG

Eletrocardiografia computadorizada em cães da raça Beagle

Estudaram-se os parâmetros eletrocardiográficos utilizando-se os métodos convencional, computadorizado e computadorizado impresso de 30 cães da raça Beagle clinicamente normais. As medidas eletrocardiográficas dos três diferentes traçados foram analisadas na derivação DII. A comparação entre os métodos revelou diferença nos valores da onda P, onda R, complexo QRS, intervalo QT e intervalo PR e na polaridade da onda T. Este fato deve ser levado em consideração, na dependência do método a ser utilizado.Electrocardiographic parameters were studied in thirty healthy adult Beagles, using conventional and computerized methods and reading the computerized registration printed on paper. The electrocardiographic measurements of the three different tracings were analyzed in lead II. The results obtained showed that there are differences among the three methods for P wave, R wave, QRS complex, QT interval, PR interval and polarity of the T wave. Special attention should be given to these differences, depending on the chosen method.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Aorticopulmonary septal defect in a dog: case report Defeito do septo aórtico-pulmonar em um cão: relato de caso

A 10-month-old intact female mixed breed dog was referred for evaluation of exercise-induced dyspnea and a low grade II/VI systolic murmur was detected. The communication between ascending aortic and pulmonary trunk was observed by detecting a continuous flow just above the semilunar valves on echoDopplercardiography and attested by surgery. After the surgical procedure, the dog was presented in good clinical conditions without exercise-induced dyspnea, reflecting the importance of an early and accurate diagnostic for the therapeutic success. This is the first Brazilian report of this rare congenital disease and the unique well succeed surgery in the veterinary literature.<br>Na avaliação da dispneia pós-exercício em uma cadela de 10 meses de idade, não castrada e sem raça definida, foi detectado sopro sistólico leve grau II/VI. A comunicação entre a aorta ascendente e o tronco pulmonar, observada pela presença de fluxo contínuo logo abaixo das valvas semilunares, à ecoDopplercardiografia, foi confirmada pela cirurgia. Após o procedimento cirúrgico, a cadela apresentou boa condição clínica e ausência de dispneia mesmo ao exercício. Ressalta-se a importância do diagnóstico precoce e preciso para o sucesso terapêutico. Este é o primeiro relato brasileiro dessa rara doença e a única cirurgia, bem sucedida, descrita na literatura veterinária consultada