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  • Author or Editor: Jesús Talavera x
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Abstract

OBJECTIVE To determine effects of a combination of acepromazine maleate and butorphanol tartrate on conventional echocardiographic variables and on strain values obtained by use of 2-D speckle tracking echocardiography (STE) in healthy dogs.

ANIMALS 18 healthy medium- and large-size adult dogs.

PROCEDURES Transthoracic echocardiographic examination (2-D, M-mode, color flow, spectral Doppler, and tissue Doppler ultrasonography) and high-definition oscillometric blood pressure measurement were performed before and after dogs were sedated by IM administration of a combination of acepromazine (0.02 mg/kg) and butorphanol (0.2 mg/kg). Adequacy of sedation for echocardiographic examination was evaluated. Circumferential and longitudinal global and segmental strains of the left ventricle (LV) were obtained with 2-D STE by use of right parasternal short-axis and left parasternal apical views. Values before and after sedation were compared.

RESULTS The sedation combination provided adequate immobilization to facilitate echocardiographic examination. Heart rate and mean and diastolic blood pressures decreased significantly after dogs were sedated. A few conventional echocardiographic variables differed significantly from baseline values after sedation, including decreased end-diastolic LV volume index, peak velocity of late diastolic transmitral flow, and late diastolic septal mitral and tricuspid annulus velocities, increased ejection time, and increased mitral ratio of peak early to late diastolic filling velocity; global strain values were not affected, but 1 segmental (apical lateral) strain value decreased significantly.

CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that acepromazine and butorphanol at the doses used in this study provided sedation adequate to facilitate echocardiography, with only mild influences on conventional and 2-D STE variables.

Full access
in American Journal of Veterinary Research

Abstract

Objective—To evaluate the usefulness of Doppler ultrasonography as a method to assess changes in digital vascular dynamics in horses with systemic inflammatory response syndrome (SIRS) or laminitis.

Design—Cross-sectional study.

Animals—42 adult Andalusian horses.

Procedures—Group 1 included 9 healthy horses, group 2 included 19 horses with SIRS without (n = 9) or with (10) a palpable increase in digital pulse intensity, and group 3 included 14 horses with laminitis without (8) or with (6) radiographic evidence of rotation or distal displacement (sinking) of the third phalanx. Qualitative spectrum characteristics and quantitative Doppler measurements of the lateral palmar digital artery were obtained for horses in each group.

Results—4 spectra, characterized by a positive systolic peak followed by several positive diastolic peaks, were observed in group 1 horses, group 2 horses, and group 3 horses that lacked radiographic changes. In the group 3 horses that had radiographic changes, laminar blood flow was detected. Diameter of the lateral palmar digital artery was significantly larger in the group 3 horses than in the group 2 horses; blood flow was significantly higher in the group 2 horses that had an increase in digital pulse intensity than in the group 2 horses without an increase in digital pulse intensity; velocity-time integral and acceleration time were significantly lower in group 3 horses, compared with group 2 horses.

Conclusions and Clinical Relevance—Results suggested that Doppler ultrasonography may be a useful complementary tool to detect digital blood flow changes of horses with SIRS, especially if they have a palpable increase in digital pulse intensity, or laminitis.

Full access
in Journal of the American Veterinary Medical Association

Abstract

Case Description—An 11-year-old neutered female domestic longhair cat was evaluated because of a 1-week history of progressive dyspnea, signs of depression, and loss of appetite. A histiocytic sarcoma had been excised from the mammary gland 6 weeks earlier.

Clinical Findings—Physical examination findings were consistent with pleural effusion, and thoracic and abdominal radiography and ultrasonography revealed pleural effusion, a thoracic mass involving the aorta and pulmonary artery, and a caudal abdominal mass that most likely represented enlarged iliac lymph nodes. Cytologic examination of the pleural fluid and fine-needle aspirates from the iliac and right popliteal lymph nodes revealed abundant cells with neoplastic characteristics of indeterminate origin. The clinical diagnosis was generalized malignant neoplasia.

Treatment and Outcome—Pleural drainage was necessary every 5 to 6 days. Exploratory thoracotomy and biopsy of the mass were recommended for better characterization of the thoracic disease. Simultaneously, palliative treatment by advancement of the omentum into the thorax was performed. A final diagnosis of disseminated histiocytic sarcoma was made, and treatment with doxorubicin was begun after surgery. During the 13 months after surgery, the cat was free from signs of respiratory tract disease and had normal activity levels with good exercise tolerance. Fifteen months after surgery, the cat's clinical condition worsened and the cat died.

Clinical Relevance—Findings suggested that thoracic omentalization may be considered for palliative treatment of cats with refractory neoplastic pleural effusion when frequent thoracocentesis is necessary and other treatments are not suitable.

Full access
in Journal of the American Veterinary Medical Association