Cardiology

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Congenital heart disease (CHD) is a morphologic defect of the heart or great vessels which is present at birth. "Congenital" does not imply the defect was inherited, although many CHD are heritable. CHD may also be caused by de novo spontaneous mutations, which have the potential to be transmitted to progeny. Diagnosis of CHD is important for the health of the patient and also to eliminate affected individuals from the breeding pool.

The primary indication for obtaining an electrocardiogram (ECG) is to evaluate an arrhythmia. Patients with a history of syncope, episodic weakness, or collapse should be evaluated with an ECG. An ECG is an insensitive test for assessment of specific cardiac chamber enlargement, and interpretation of structural heart disease is best done using radiography and echocardiography.

Cats presenting with pleural effusion are nearly always in respiratory distress, ranging from an increased respiratory rate and effort to open mouth breathing. In the latter situations, therapeutic intervention must be initiated quickly to prevent respiratory arrest. The therapeutic intervention also provides your first diagnostic test.

Thrombophilia (hypercoagulability or prothrombotic state) is a complex disorder with a diverse and multifactorial pathogenesis that results in a wide spectrum of clinical manifestations. It is well-recognized as a frequent and serious cause of morbidity and mortality in people. It appears less prevalent in dogs and cats for several reasons.

A new study performed at Auburn University's College of Veterinary Medicine is radically changing our understanding of how heartworms affect the cat. In this study three groups of cats were studied for 8 and 16 months with antibody and antigen tests, radiographs of the heart and lungs, and necropsy examinations of the heart and lungs.

Respiratory abnormalities are relatively common in cats, who may suffer from a wide range of disease processes. An initial triage step in the management of a dyspnic cat is to determine whether the dyspnea is cardiogenic or due to extracardiac (primary pulmonary) disease. This task is in no way a simple one, as cats often have non-specific history and physical examination abnormalities.

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Echocardiography has emerged as the most valuable non-invasive tool for evaluation of cardiac structure, function, blood flow patterns, and has greatly diminished the need for diagnostic cardiac catheterizations and angiocardiography in many cases. Echocardiography is one tool for evaluation of the cardiac patient, but should be used in conjunction with other diagnostic tests including thoracic radiography and electrocardiography for a global assessment of the patient.

Although there are highly sophisticated and advanced diagnostic modalities in cardiology, the basic technique of a good cardiovascular examination is still an essential fundamental element of the cardiovascular workup. Other basic diagnostic modalities that are readily available in most practices include thoracic radiographs, electrocardiography, and blood pressure measurement.