Condition | Autonomic changes | Orthostatic symptomsΔ | |
BP* | HR¶ | ||
POTS | ↔ | ↑ | + |
Orthostatic hypotension | ↓ | ↑ | + |
Reflex syncope | ↓↓ | ↓ | + |
Chronic isolated orthostatic intolerance | ↔ | ↔ | + |
Benign tachycardia | ↔ | ↑ | – |
BP: blood pressure; HR: heart rate; POTS: postural tachycardia syndrome.
* Drop in BP defined by decrease in systolic or diastolic BP at least 20 or 10 mmHg, respectively.
¶ Elevation defined by HR elevation exceeding 30 beats/minute (40 beats/minute in patients under 20 years of age) above a resting baseline.
Δ Symptoms brought on by standing and relieved by sitting down. Common symptoms include lightheadedness, palpitations, weakness, and difficulty concentrating.Do you want to add Medilib to your home screen?