Diagnosis
The evaluation of atrial fibrillation involves diagnosis, determination of the etiology of the arrhythmia, and classification of the arrhythmia. The minimal evaluation of atrial fibrillation is a history and physical examination, ECG, transthoracic echocardiogram, and case specific bloodwork. Depending upon given resources, afflicted individuals may benefit from an in-depth evaluation which may include correlation of the heart rate response to exercise, exercise stress testing, chest X-ray, trans-esophageal echocardiography, and other studies.
If a patient presents with a sudden onset of severe symptoms other forms of tachyarrhythmia must be ruled-out, as some may be immediately life threatening, such as ventricular tachycardia. While most patients will be placed on continuous cardiorespiratory monitoring, an electrocardiogram is essential for diagnosis.
Provoking causes should be sought out. A common cause of any tachycardia is dehydration, as well as other forms of hypovolemia. Acute coronary syndrome should be ruled out. Intercurrent illness such as pneumonia may be present.
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