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Infective endocarditis causing aortopulmonary fistula and intracardiac thrombosis in a dog
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Transient deep and giant negative T waves in dogs with myocardial injury
Full text linkIntroduction: Although transient deep and giant negative T waves (NTWs) may develop during myocardial injury (MI) in humans, no data exist on this repolarization abnormality in canine MI. Therefore, this study aimed to describe the occurrence of transient deep/giant NTWs in dogs with MI. Animals, Materials and Methods: Medical records were retrospectively searched to identify dogs with MI and transient deep/giant NTWs. Signalment, history, and selected diagnostic test results were reviewed. Data analysis was descriptive. Results: Six cases were diagnosed with MI associated with deep (n = 1) and giant (n = 5) transient NTWs. Myocardial injury was classified as acute in all cases and was due to snake envenomation (n = 3), sepsis (n = 2), and systemic inflammatory response syndrome (n = 1). At the time of deep/giant NTWs identification, all dogs had elevated cardiac troponin I and ≥1 echocardiographic abnormality of the left ventricular structure and/or function. Moreover, all dogs with giant NTWs had prolonged QT intervals. After the MI resolution, T-wave polarity and QT-interval duration became normalized in all dogs. Moreover, left ventricular morphological and functional parameters were completely normalized in four dogs. In contrast, ventricular echogenicity remained heterogeneous in two dogs, despite otherwise normalized ventricular parameters. Five dogs were still alive at the conclusion of the study. Conclusions: Transient deep/giant NTWs may develop in dogs with acute MI and T-wave polarity changes seem to occur synchronously with the evolution of myocardial damage. Moreover, transient deep/giant NTWs seem associated with a favorable prognosis in canine MI
Atrofia congenita del pancreas nel cane: osservazione di un episodio in consanguinei di setter inglese.
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Suspected sequential left atrial ruptures in a dog with myxomatous mitral valve disease
No full textAn 11-year-old mixed breed dog was presented with exercise intoler-ance , syncope. At admission, transthoracic echocardiography revealed myxoma-tous mitral valve disease (MMVD) associated with severe left atrial (LA) enlargement and moderate anechoic pericardial effusion with a hyperechoic den-sity suggestive of a thrombus. Rupture of the LA free wall secondary to MMVD was suspected , medical therapy with furosemide and pimobendan was in-itiated. After one month, recheck echocardiography showed mild anechoic pericar-dial effusion and an acquired atrial septal defect with a left-to-right intracardiac shunting flow. In light of the dog's history, the latter finding was suspected to be secondary to a further rupture of the LA wall due to MMVD, this time affecting the interatrial septum. The images described here allow us to suspect that sequen-tial LA wall ruptures developed over time in the same subject affected by MMVD, a clinical presentation not previously described in veterinary medicine.(c) 2022 Elsevier B.V. All rights reserved
Aorticopulmonary Septal Defect in a German Shepherd Dog
No full textA 2-year-old, female German shepherd dog was referred with a 2-month history of dyspnea, ascites, and anorexia. On physical examination, an arrhythmia, tachypnea, and a continuous grade V/VI heart murmur were evidenced. Atrial fibrillation anti tall R waves were noted on electrocardiography. Survey thoracic radiography revealed generalized cardiomegaly and enlarged pulmonary vessels. Echocardiography demonstrated severe dilatation of the left atrium and ventricle with reduced fractional shortening. Doppler echocardiography showed continuous and turbulent flow in the ascending aorta between the aorta and the pulmonary artery. Necropsy demonstrated an aorticopulmonary septal defect
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