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→Clinical Signs
== Clinical Signs ==
== Clinical Signs ==
The natural history of the disease is described in two phases.
The '''asymptomatic (occult) phase''' is when no clinical signs are apparent, but there may be structural, functional or electrical abnormalities. These include increased left ventricular and left atrial internal diameter, reduced myocardial contractility and ventricular premature contractions. The duration of this occult phase is variable and can last from months to years.
The '''overt clinical phase''' is when clinical signs, such as congestive heart failure (CHF), syncope and exercise intolerance, develop. Arrhythmias are common in this stage.
== Diagnosis ==
== Diagnosis ==