Orthostatic Hypotension in Parkinson's Disease

Definition and Diagnosis

Classical orthostatic hypotension is defined as a sustained decrease in systolic BP ≥20 mmHg or diastolic BP ≥10 mmHg within 3 minutes of standing, as defined by the European Society of Cardiology 1, 2
In patients with supine hypertension, a systolic BP drop ≥30 mmHg should be considered significant, according to the European Society of Cardiology 1, 2

Symptoms of orthostatic hypotension include dizziness, light-headedness, weakness, fatigue, visual disturbances, and in severe cases, syncope, as reported in the European Heart Journal 2

Patient education about positional changes and symptom recognition is recommended by the American Heart Association 3, 4
Physical counter-pressure maneuvers (leg crossing, lower body muscle tensing) can increase blood pressure, as suggested by the American Heart Association 3
Compression garments (at least thigh-high, preferably including abdomen) are recommended by the American Heart Association 3
Adequate hydration and salt intake are advised by the European Society of Cardiology 4
Sleeping with the head of the bed elevated (10°) is recommended by the European Society of Cardiology 4
Acute water ingestion (≥240 mL) can provide temporary relief, with peak effect occurring 30 minutes after ingestion, as reported in Circulation 3

Midodrine (alpha-1 adrenergic agonist) can be beneficial for neurogenic orthostatic hypotension, as suggested by the American College of Cardiology 3
Fludrocortisone increases plasma volume and can improve symptoms, according to the American College of Cardiology 3
Droxidopa may improve symptoms of neurogenic orthostatic hypotension in Parkinson's disease, as reported in Circulation 3
Pyridostigmine may be beneficial in patients refractory to other treatments, as suggested by the American College of Cardiology 3

Symptoms depend more on the absolute BP level than the magnitude of the fall, as reported in the European Heart Journal 1
Supine hypertension may limit the use of certain medications like midodrine, droxidopa, and fludrocortisone, according to the American College of Cardiology 3
In elderly patients, orthostatic hypotension may present atypically and is associated with increased mortality and cardiovascular disease prevalence, as reported in the Journal of the American College of Cardiology 1, 5
Polypharmacy is a common issue in Parkinson's disease patients and should be carefully managed to minimize orthostatic hypotension, as suggested by the American College of Cardiology 6