This report compares two fundamentally different clinical trajectories. Henrik is 2+ years post-allogeneic HSCT with chronic GVHD and severe autonomic dysfunction (HRV consistently below the ESC 15ms threshold). Mitchell is ~15 months post-stroke (bilateral carotid/vertebral artery dissection) with mildly impaired but recovering autonomic function. Direct HRV magnitude comparison is less meaningful than trajectory shape and relative changes within each patient's own range.
Normalization approaches (z-score, percent-of-baseline) allow meaningful cross-patient comparison despite the 5x difference in absolute HRV values. All heart rate values are derived from sleep periods (not readiness scores). Oura readiness 'resting_heart_rate' is a 0-100 score and is never used as bpm.