Hyperthyroidism:
Sequoia Medical 360

Expert Care for Overactive Thyroid in Bronxville & Westchester, NY

Hyperthyroidism occurs when the thyroid gland produces too much hormone, sending metabolism into overdrive. This can affect nearly every organ system — from your heart rhythm to your bone density. Common symptoms include anxiety, palpitations, weight loss despite normal eating, heat intolerance, tremors, and sleep disturbance. Left untreated, hyperthyroidism increases the risk of atrial fibrillation, osteoporosis, and even life-threatening thyrotoxic crises.
At Sequoia Medical 360, we provide precision diagnosis and highly individualized treatment for all forms of hyperthyroidism. With expertise spanning Graves’ disease, toxic nodules, thyroiditis, and rare genetic conditions, Dr. Tony Mathews integrates advanced diagnostics, metabolic monitoring, and concierge-level follow-up to restore balance and protect long-term health.

Common Causes of Hyperthyroidism

Graves’ Disease

The most common cause of hyperthyroidism, Graves’ is an autoimmune disorder where antibodies (TSI/TRAb) stimulate the thyroid gland to produce excess hormone.

Symptoms: Weight loss, rapid heartbeat, tremors, heat intolerance, anxiety, sweating, and sometimes bulging eyes (Graves’ ophthalmopathy).
Diagnosis: Thyroid hormone panel (TSH, free T4, T3), antibody testing, and ultrasound or uptake scans.
Management:
  • Antithyroid medications (methimazole, PTU in select cases)
  • Beta-blockers for heart rate control
  • Radioiodine ablation for definitive therapy (not ideal in those with active eye disease)
  • Surgical referral when appropriate
  • Ophthalmology collaboration for Graves’ eye disease

Toxic Nodules (Toxic Adenoma or Multinodular Goiter)

Sometimes, a single nodule or multiple nodules become autonomously active, producing thyroid hormone regardless of the body’s needs.

Symptoms: Often milder than Graves’ but may include palpitations, weight loss, and neck swelling.
Diagnosis: Suppressed TSH with elevated thyroid hormones, confirmed with radioactive iodine uptake scans showing localized or patchy overactivity.
Management:
  • Antithyroid medications or beta-blockers for symptom control
  • Radioiodine ablation or surgery for definitive treatment
  • Regular ultrasound to monitor nodule growth and characteristics

Thyroiditis (Inflammatory Causes)

Thyroiditis refers to inflammation of the thyroid gland, which can cause a temporary release of stored hormones, leading to hyperthyroidism followed by hypothyroidism.

Subacute thyroiditis: Often post-viral, painful swelling, fever, neck tenderness.
Silent thyroiditis: Painless, often autoimmune in origin.
Postpartum thyroiditis: Appears within a year of childbirth, with a transient hyperthyroid phase before evolving to hypothyroidism.
Management: Usually supportive — beta-blockers for symptoms, anti-inflammatories for pain, and careful monitoring since many patients later develop hypothyroidism.

Thyroid Storm (Thyrotoxic Crisis)

A rare but life-threatening complication of uncontrolled hyperthyroidism.

Triggers: Severe illness, surgery, trauma, or untreated hyperthyroidism.
Symptoms: High fever, severe tachycardia, delirium, dehydration, and cardiovascular collapse.
Management: Emergency hospitalization with high-dose antithyroid drugs, beta-blockers, corticosteroids, and supportive care.
At Sequoia, our proactive monitoring is designed to prevent patients from ever reaching this crisis stage.

Thyroid Hormone Resistance & Other Rare Causes

In rare cases, patients may appear hyperthyroid on labs but not in symptoms — or vice versa.

Thyroid hormone resistance: A genetic condition where tissues respond abnormally to normal or high hormone levels
Central hyperthyroidism (TSHoma): A rare pituitary tumor producing excessive TSH, leading to high thyroid hormone levels.
Iodine-induced hyperthyroidism: May occur after contrast dye or excessive supplementation.These conditions require nuanced diagnosis and specialist management — an area where Sequoia’s expertise in complex endocrinology is invaluable

Our Diagnostic Approach at Sequoia Medical 360

We use a full spectrum of tools to pinpoint the cause of hyperthyroidism:

Comprehensive thyroid panel (TSH, free T4, T3)
Antibody testing (TSI/TRAb for Graves’, TPO for autoimmune overlap)
High-resolution ultrasound to assess vascularity, nodules, or gland texture
Radioiodine uptake and scan to distinguish between Graves’, toxic nodules, and thyroiditis
Body composition analysis (InBody 770): Assessing muscle, fat, and bone impact
Cardiovascular context: ECG, heart rate monitoring, lipid and bone density testing

Personalized Treatment Strategies

Symptom relief: Beta-blockers to stabilize heart rate, tremors, and anxiety
Antithyroid medications: Methimazole/PTU with structured monitoring to avoid under- or overtreatment
Definitive therapies: Radioiodine ablation or thyroidectomy when indicated
Autoimmune integration: Selenium and targeted eye management in Graves’ ophthalmopathy
Bone and cardiac monitoring: Protecting against osteoporosis and arrhythmias with preventive strategies

The Sequoia Medical 360 Advantage

Quadruple board-certified care with dual fellowship training in Endocrinology and Preventive Cardiology
Direct Physician Counsel: Ample, scheduled exam time and streamlined communication to review results with the depth your physiology requires.
Advanced diagnostics: Antibody testing, ultrasound, nuclear medicine, and InBody analysis
Continuity of care: Seamless management across endocrinology, cardiovascular risk, bone health, and longevity medicine

Regain Balance & Protect Your Future

Hyperthyroidism is more than just “too much thyroid hormone” — it’s a condition that can affect every aspect of your life and long-term health. At Sequoia Medical 360, we provide the clarity, precision, and continuity of care needed to restore balance and protect your heart, bones, and energy.

Meet Dr. Mathews
The Sequoia Standard
Request Enrollment
SQMed360.com
Located in Bronxville, serving Westchester & all of New York State.
(914) 292-0300
Scroll to Top