Bruce H. Knox
Independent Scholar, Auckland, New Zealand
Publications
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Case Study
Activity-Dependent Upright Gait Failure With Home-Documented Delayed Hypotension A Patient-Authored Clinical Observation of Delayed Activity-Provoked Orthostatic Intolerance
Author(s): Bruce H. Knox*
Objective: To describe delayed, activity-dependent upright gait dyscontrol with preserved recumbent cycling in association with symptom-linked systemic hypotension. Methods: A 74-year-old patient-author compiled contemporaneous symptom records and home arm-cuff blood-pressure and heart-rate measurements during ordinary upright activity in August 2026. Cerebral blood flow was not measured. Results: Walking initially remained normal but became unsafe after approximately 10-20 minutes, with head fog, visual blurring, disequilibrium, lateral instability, 1 fall, and 4 near-falls; recumbent cycling remained substantially better tolerated. On August 19, blood pressure/heart rate changed from 121/72 mm Hg and 78 after 3 minutes standing without symptoms to 107/53 and 85 after approximately 30 minutes of activity with head.. Read More»