Recurrent supraventricular arrhythmias in a dog with atrial myocarditis and gastritis

Tyszko, C.; Bright, Janice M.; Swist, Sandra

doi:10.1111/j.1748-5827.2007.00337.x

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…None of the dogs in the described group demonstrated conduction blocks. Supraventricular and ventricular tachycardia, and changes imitating dilated cardiomyopathy described in our study and the presence of myocarditis are rarely interrelated [5,10-12]. …”

Section: Resultsmentioning

confidence: 94%

Myocarditis in dogs: etiology, clinical and histopathological features (11 cases: 2007–2013)

et al. 2014

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BackgroundMyocarditis is a disease caused by numerous etiological factors and characterized by a non-specific course. The only method allowing for precise characterization of inflammatory changes is the histopathological examination of heart muscle specimens. The study was conducted on heart muscle preparations from 11 dogs with ante-mortem diagnosis of cardiac disease. Animals presented with a poor response to an applied treatment or had suspected sudden cardiac death. The heart specimens were taken post-mortem, preserved and stained with haematoxylin and eosin. Subsequently, the presence and intensity of changes, i.e. inflammatory infiltration, the amount of connective tissue and features of cardiomyocyte degeneration were estimated. The specimens from dogs suspected of having a myocarditis of bacteriological etiology underwent additional bacteriological and immunohistochemical examination.ResultsThe examination revealed an inflammatory infiltration of variable intensity combined with the degenerative changes in all dogs. There were vegetative and abnormal cystic forms of Borrelia burgdorferi sensu lato in 6 dogs. A Staphylococcus aureus infection was confirmed in one dog and an acute coronary syndrome with neutrophil infiltration was revealed in another one.ConclusionsAlthough the clinical pattern in patients with myocarditis is diverse, the definitive morphological diagnosis is made based on the histopathological examination. This examination can lead to a better understanding of the pathogenesis of the disease. To the best of our knowledge, this is the first description of myocarditis combined with the presence of spore forms of Borrelia burgdorferi sensu lato in the heart specimens of dogs.Electronic supplementary materialThe online version of this article (doi:10.1186/s13620-014-0028-8) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 94%

Myocarditis in dogs: etiology, clinical and histopathological features (11 cases: 2007–2013)

et al. 2014

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“…The gold standard in myocarditis investigation is endomyocardial biopsy (Magnani et al, 2006). There are publications dedicated to myocarditis diagnostic (Agudelo et al, 2011;Guedes et al, 2009;Noszczyk-Nowak et al, 2014;Santilli et al, 2017;Tyszko et al, 2007;Woolley et al, 2007) and much less about the endovascular biopsy. In human medicine, the most common causes of myocarditis are viral agents and more rarely non-virus genera (Borr.…”

Section: Discussionmentioning

confidence: 99%

Immun?-Mediated Myocarditis Associated with Leptospirosis in 6 Years Old Labrador Retriever

Dmitrii¹,

Anna

2018

American Journal of Animal and Veterinary Sciences

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About 6 years old, male Labrador retriever was presented for 10 days long weakness and fatigue. After diagnostic examinations, a preliminary diagnosis of Leptospirosis was suggested. Cardiologist consultation was advised. At admission, the dog was depressed, the visible mucosa was pale and capillary refilling time was slowed. Weak systolic murmur and rhythm disturbances were auscultated. Thoracic radiography revealed the accented bronchial pattern and non-significant peribronchial opacity. Cardiac silhouette stayed within normal limits. Two-dimensional echocardiography showed mild hypertrophy of left ventricular walls, with wall segments hypokinesia. The chambers were not dilated, there was no evidence of valves damage. Systolic function was preserved. Electrocardiography showed several sinus complexes and paroxysms of ventricular tachycardia up to 30-40 beats. Myocarditis was suspected and Bartonellosis (Bart. vinsonii&henselae), Borreliosis (Bor. burgdorferi), Troponin I tests were recommended. Amiodarone, ramipril, doxycycline, ampicillin and prednisone were prescribed and an endomyocardial biopsy was performed. Histopathological examination revealed severe myocardial degeneration and inflammatory cells infiltration. Based on positive tissue PCR Leptospirosis test and histopathology findings, excluding other possible infection, resulting in myocardium inflammation, the diagnosis of immune-mediated secondary myocarditis was made.

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“…Myocarditis can be focal or diffuse and may only involve specific parts of the heart 9 . Isolated atrial myocarditis is appreciated in clinical and veterinary literature, but only rarely reported in postmortem literature 10–16 . Isolated lymphocytic myocarditis has been reported to cause death.…”

mentioning

confidence: 99%

“…9 Isolated atrial myocarditis is appreciated in clinical and veterinary literature, but only rarely reported in postmortem literature. [10][11][12][13][14][15][16] Isolated lymphocytic myocarditis has been reported to cause death. The diagnosis cannot be made using postmortem computed tomography (PMCT) and can be potentially missed during the postmortem examination.…”

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confidence: 99%

Isolated Atrial Neutrophilic Myocarditis

Duffy¹,

O’Connor

Milne

et al. 2021

Am J Forensic Med Pathol

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Myocarditis can focally or diffusely involve the myocardium and is associated with arrhythmia, cardiac failure, and sudden death. The majority of cases of myocarditis are lymphocytic in etiology, and neutrophilic myocarditis is relatively uncommon. Although reported in lymphocytic myocarditis, isolated/focal neutrophilic myocarditis of the atrium causing death is not reported in the postmortem literature, and its postmortem computed tomography correlation is not documented. We report a fatal case of isolated neutrophilic atrial myocarditis affecting only the left atrium in a 33-year-old woman presenting as a sudden unexpected death. Microscopy of the left atrium, a not commonly sampled area of the heart, showed florid neutrophilic myocarditis with the remaining right atrium, conduction system, and both ventricles uninvolved. Similar to previously reported fatal isolated atrial lymphocytic myocarditis, postmortem computed tomography was unable to detect any atrial abnormalities. This case highlights a potential “blind spot” for both routine postmortem imaging and examination.

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Recurrent supraventricular arrhythmias in a dog with atrial myocarditis and gastritis

Cited by 8 publications

References 34 publications

Myocarditis in dogs: etiology, clinical and histopathological features (11 cases: 2007–2013)

Myocarditis in dogs: etiology, clinical and histopathological features (11 cases: 2007–2013)

Immun?-Mediated Myocarditis Associated with Leptospirosis in 6 Years Old Labrador Retriever

Isolated Atrial Neutrophilic Myocarditis

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