Patients with this mechanism usually experience an increase of ≥10 mm Hg in the systolic BP upon standing and sympathetic symptoms, such as palpitations, anxiety, and tremors
[unboundmedicine.com]
Women are most frequently affected, and may present with palpitations, chest discomfort, shortness of breath, weakness, exercise intolerance, lightheadedness, presyncope,
[ncbi.nlm.nih.gov]
He also had a decrease in concentration and focus, palpitations, lightheadedness, dizziness, presyncope, and anxiousness at times, and suffered from abdominal discomfort,
[karger.com]