The evaluation of beriberi begins with a history and physical examination.

Physical findings in those with beriberi may include:

• Numbness
• Muscle weakness
• Muscle wasting
• Signs of congestive heart failure

Testing is required to make the diagnosis of beriberi.

Tests that may be used to evaluate beriberi include:

• Serum thiamine level
• Thyroid profile
• Complete blood count

Beriberi may cause congestive heart failure.

Tests used to evaluate those with signs of heart failure include:

• Chest x-ray:
• May be normal or show heart enlargement
• Normal chest x-rays
• Enlarged heart
• Heart failure
• EKG
• MUGA scan
• Thallium heart scan
• Thallium stress test
• Echocardiography
• Cardiac catheterization