Differential Diagnosis and Management of Dizziness with Hypertension and Bradycardia

Initial Assessment and Risk Stratification

The severity of hypertensive emergency is determined by the presence of acute hypertension-mediated organ damage, not absolute blood pressure values, according to the European Heart Journal and Hypertension guidelines 1, 2, 3
Emergency symptoms include neurologic, cardiac, and other manifestations such as headache, visual disturbances, focal neurological deficits, altered mental status, seizures, lethargy, chest pain, dyspnea, signs of acute heart failure or pulmonary edema, and dizziness from impaired cerebral autoregulation 1, 2, 3
Dizziness alone with elevated BP but no acute organ damage is NOT a hypertensive emergency and should be managed with oral therapy over 24-48 hours, as recommended by the Hypertension guideline 1

Beta-blockers are the most common culprit and can cause bradycardia, hypotension, dizziness, fatigue, and masking of hypoglycemia symptoms, according to the Circulation journal 4
Calcium channel blockers can also cause bradycardia, hypotension, AV block, and dizziness, as reported in the Circulation journal 4, 5

Classical orthostatic hypotension is characterized by a BP drop within 30 seconds to 3 minutes of standing, with symptoms including dizziness, pre-syncope, fatigue, and visual disturbances, according to the European Heart Journal 6
Delayed orthostatic hypotension is a progressive BP fall over 3-30 minutes, with a prolonged prodrome of dizziness, weakness, and palpitations, as described in the European Heart Journal 6

Laboratory analysis should include hemoglobin, platelets, creatinine, sodium, potassium, LDH, haptoglobin, and urinalysis with microscopy, as recommended by the Hypertension and European Heart Journal guidelines 1, 2, 3
Diagnostic examinations should include ECG, fundoscopy, and additional studies as indicated, such as troponin, CT brain, and echocardiography, according to the European Heart Journal guideline 2, 3

If hypertensive emergency with organ damage is present, immediate BP reduction is required, with a target of reducing MAP by 20-25% over the first hour, as recommended by the Hypertension guideline 1
If BRASH syndrome is suspected, aggressive multi-modal therapy is required, including stopping all AV nodal blocking agents, vasopressor support, urgent dialysis, and admission to ICU, although the specific citation for this is ignored
If medication-induced bradycardia without emergency is present, gradual dose reduction of beta-blockers over 1-2 weeks is recommended, with patient education on transient dizziness, according to the European Journal of Heart Failure guideline 7
If orthostatic hypotension is predominant, management focuses on non-pharmacologic and cautious medication adjustment, including lying-to-standing test, review and reduction of offending medications, patient education, and consideration of fludrocortisone or midodrine, as recommended by the European Heart Journal and European Journal of Heart Failure guidelines 6, 7