Long-Term Management and Surveillance

Managing Familial Hyperaldosteronism Type I (FH-I) is a long-term journey that focuses on two goals: keeping blood pressure in a safe range and minimizing the side effects of medication ^[1][2]. Because this condition is so rare, your care team—which should include a specialized endocrinologist—will tailor a surveillance plan specifically for you or your child based on the latest expert consensus ^[1].

The “Sick Day” Safety Net

If you or your child are taking maintenance glucocorticoids (like dexamethasone or prednisone), your body may become less able to produce its own “stress hormones” when ill or injured ^[3]. This makes having a “Sick Day” plan essential:

• Stress Dosing: During times of fever, severe infection, or before surgery, you need a written, individualized plan from your doctor that explicitly instructs how to temporarily increase the dose of medication to help the body handle the stress ^[4][5]. Never taper or stop glucocorticoids without medical advice.
• Emergency Injections: If a patient is vomiting and cannot keep their oral medication down, they may need an injection of hydrocortisone and immediate medical attention to prevent a life-threatening adrenal crisis ^[4][6]. You should receive proper training and a kit, rather than assuming you should self-treat without professional guidance.
• Medical Alerts: It is highly recommended that patients wear a medical alert bracelet or carry a card stating they are on long-term steroid therapy, which can provide critical information to emergency responders ^[5].

Protecting the Heart, Eyes, and Brain

Because high blood pressure can impact the body’s smallest and largest blood vessels, regular “baseline” checks are used to monitor for early changes:

• The Heart: An echocardiogram (an ultrasound of the heart) is used to check for left ventricular hypertrophy (heart thickening) ^[2]. While there is no universal schedule, these are often done at diagnosis and then periodically as determined by your specialist ^[2].
• The Eyes: Regular eye exams help ensure the high blood pressure is not causing retinopathy (damage to the back of the eye) ^[2][7].
• The Brain: FH-I is linked to a higher risk of intracranial aneurysms (weak spots in brain arteries) and early stroke ^[8][9]. Most experts suggest a shared, individualized discussion about “baseline” brain imaging—such as an MRA or CTA—especially if there is a family history of early strokes or aneurysms ^[10][8]. There is no universally accepted schedule. Note that CTA involves radiation and iodinated contrast, whereas MRA may involve sedation or contrast in children.

Monitoring Growth and Bone Health

For children and teenagers, the primary concern with long-term steroid use is its effect on physical development.

• Growth Tracking: Your doctor will precisely track your child’s height velocity (how fast they are growing) and weight at every visit ^[11]. If growth slows down unexpectedly, it may be a sign that the steroid dose is too high ^[12].
• Bone Density: Steroids can affect bone strength over time ^[13]. In some cases, a DXA scan (a specialized X-ray) may be used to monitor bone density, particularly if a child has a history of fractures ^[14]. Protective measures, such as Vitamin D and calcium intake, should be assessed and guided by your clinician rather than self-prescribed ^[15].

Your Role in Monitoring

Between doctor visits, your “home data” is the most valuable tool for your care team.

• Home Blood Pressure Log: Keeping a consistent record of blood pressure at different times of the day helps your doctor adjust medications precisely ^[16][10]. Use a validated upper-arm cuff of the correct size. Take readings while seated and rested, and your doctor may sometimes order ambulatory blood pressure monitoring for a 24-hour view.
• Routine Lab Assessment: Routine assessments of electrolytes (potassium, sodium), creatinine/eGFR, and urine protein directly affect treatment safety and should be ordered by your clinician.
• Watch for “Red Flags”: Be aware of sudden, severe headaches or neurological changes, as previously discussed in the risks section, and report them to your medical team immediately ^[9][2].

By staying consistent with monitoring and medication, most families find they can successfully manage FH-I and prevent long-term complications ^[10][16].