Management of Chest Pain in Hyperthyroidism or Graves' Disease

Initial Assessment and Risk Stratification

Severe, prolonged chest pain of acute onset requires immediate hospital care regardless of cause, with differential diagnoses including myocardial infarction, unstable angina, aortic dissection, or pulmonary embolism 3, 4
Obtain a 12-lead ECG immediately, as more than 50% of patients with chronic stable angina have normal resting ECGs, but acute changes mandate urgent intervention 5
Check cardiac troponins and repeat at 6-12 hours if initial values are normal, to rule out acute coronary syndrome 6
If acute coronary syndrome is suspected, administer aspirin 250-500 mg (chewable or water-soluble) immediately, as recommended by the European Heart Journal 3, 4
Pain accompanied by cold sweat, nausea, vomiting, or syncope indicates serious pathology, according to the European Heart Journal 4
Hyperthyroidism specifically increases risk through decreased systemic vascular resistance, increased cardiac output, persistent tachycardia, and potential pulmonary artery hypertension, as noted by the American College of Cardiology 1, 2
In patients over 50 years, cardiovascular complications are the chief cause of death after hyperthyroidism treatment, highlighting the importance of prompt management 1, 2

Pulmonary artery hypertension may cause right ventricular strain and chest discomfort, as reported by the American College of Cardiology 2
Hyperthyroidism creates a "functional angina" by increasing myocardial oxygen demand beyond supply capacity, which can unmask underlying coronary artery disease or cause symptoms even with normal coronary arteries, according to the Journal of the American College of Cardiology 7, 5

Start beta-blockers immediately for all symptomatic patients, as this is the cornerstone of acute management, with the goal of lowering heart rate to nearly normal, which improves tachycardia-mediated ventricular dysfunction, as recommended by the American College of Cardiology 8, 1, 2
Propranolol or atenolol should be initiated promptly to control heart rate, reduce tremors, and mitigate cardiovascular complications, with the American College of Cardiology noting its importance in managing hyperthyroidism-related cardiac issues 8, 1, 2
Initiate antithyroid medications (methimazole or propylthiouracil) to control hyperthyroidism, as recommended by the Journal of Clinical Oncology 8, 1
Consider endocrine consultation for Grade 2 or higher symptoms (moderate symptoms affecting activities of daily living), as suggested by the Journal of Clinical Oncology 8

Measure TSH (first-line test with >98% sensitivity), free T4, and total or free T3, to confirm overt hyperthyroidism, with the American College of Cardiology recommending urgent testing if cardiac symptoms or arrhythmias are present 2
If cardiac symptoms or arrhythmias present, testing should be performed urgently, as emphasized by the American College of Cardiology 2
Evaluate for pulmonary artery hypertension with echocardiography, as recommended by the American College of Cardiology 2

Hold or hospitalize for Grade 3-4 symptoms (severe, medically significant, or life-threatening consequences), with immediate endocrine consultation required for all Grade 3-4 cases, as recommended by the Journal of Clinical Oncology 8
Consider ICU admission for thyroid storm, severe cardiomyopathy, or hemodynamic instability, with the Journal of Clinical Oncology highlighting the importance of prompt intervention 8
Physical examination findings of ophthalmopathy or thyroid bruit are diagnostic of Graves' disease and should prompt early endocrine referral, as recommended by the Journal of Clinical Oncology 8