Study note
MedicineCardiology

Initial investigations for newly diagnosed atrial fibrillation

THE CONTEXT
Assessment of newly diagnosed atrial fibrillation includes clinical evaluation and investigations for cardiac structural disease and thyrotoxicosis.

Initial assessment

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Obtain a full history and physical examination, a 12-lead ECG, an echocardiogram and thyroid function tests.

Purpose of targeted investigations

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Thyroid function tests are used to exclude thyrotoxicosis.
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Echocardiography identifies structural heart disease, particularly mitral valve disease.
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