Evaluation of Arm Weakness in Hypertensive Patients

Diagnostic Approach

Measuring blood pressure in both arms is crucial to detect discrepancies that might suggest aortic pathology or renovascular disease, as recommended by the American Heart Association 1, 2
Assessing for orthostatic changes is important if the patient is stable enough, according to the American Heart Association 2

A complete blood count is necessary, as stated by the American College of Cardiology 4
Fasting lipid panel is recommended, as suggested by the American College of Cardiology 5
Urinalysis is also necessary, according to the American College of Cardiology 4
ECG is crucial to evaluate for atrial fibrillation or acute coronary syndrome, as recommended by the American College of Cardiology 5

Screening for acute end-organ damage is essential in hypertensive emergency, including fundoscopy for retinopathy, cardiovascular examination, and neurological deficits, as stated by the American College of Cardiology 4
If BP ≥180/110 mmHg with acute neurological symptoms, this constitutes hypertensive emergency requiring immediate evaluation, according to the American College of Cardiology 4
Renovascular disease should be considered in younger patients with difficult-to-control hypertension, as suggested by the American College of Cardiology 6
Primary aldosteronism can present with muscle weakness from hypokalemia, according to the American College of Cardiology 6
Obstructive sleep apnea is associated with resistant hypertension, as stated by the American College of Cardiology 6
Medication/substance-induced hypertension should be considered, including NSAIDs, decongestants, cocaine, and amphetamines, as recommended by the American College of Cardiology 6

Reducing BP by no more than 25% in the first hour, then gradually to 160/100 mmHg over 2-6 hours, is recommended in hypertensive emergency with end-organ damage, as stated by the American College of Cardiology 4
Using IV medications (nicardipine, labetalol) in a monitored setting is crucial, according to the American College of Cardiology 4

Not assuming "well-controlled" hypertension excludes stroke, as hypertensive patients develop specific brain injury patterns, including white matter disease and microinfarcts, as stated by the American College of Cardiology 3
Not relying solely on CT, and proceeding to MRI if CT negative but clinical suspicion high, is recommended, according to the American College of Cardiology 3