Aveir VR – Cognitive Load / Speech Micro‑Acceleration & Rate‑Response

Short answer: Yes—this is plausible and testable. Aveir VR uses an internal 3‑axis accelerometer to drive the sensor‑indicated rate (SIR). Phonation (speaking, humming), breath control, and subtle head/upper‑thorax movements during thinking/talking can generate micro‑accelerations that cross the device’s Activity Threshold. When that happens, SIR rises and %RR pacing can increase—even without meaningful whole‑body activity—leading to palpitations, chest awareness, lightheadedness, or “mental fatigue.” Cognitive load itself doesn’t produce acceleration, but it often accompanies posture shifts and irregular breathing that the accelerometer can interpret as activity.

How to confirm (single‑visit provocation protocol)

• Tasks (5–8 min each): quiet rest → silent reading → reading aloud → free conversation → sustained vowels (soft/loud; low/high pitch) → mental arithmetic (serial‑7s/Stroop).
• Programming crossover: RR OFF → RR ON (baseline) → RR titrated (raise Activity Threshold; lower Response Factor/Slope; lengthen Reaction Time; adjust Recovery).
• Measurements: device telemetry (sensor counts/threshold crossings, SIR, %RR pacing), intracardiac EGM markers, external sternum/neck accelerometry, respiratory belt, symptom button with timestamps.
• Positive test: symptoms temporally align with rises in SIR/%RR pacing during speech; they abate when RR is OFF or after increasing Activity Threshold.

Programming strategies (stepwise—stop when symptoms abate)

Adjustment	Intended effect	Practical notes
Increase Activity Threshold	Require larger acceleration to trigger RR	First‑line for speech‑coupled triggers
Lower Response Factor / Slope	Blunt the magnitude of rate rise	Reduces “spiky” HR responses to brief vibration
Lengthen Reaction Time	Slow onset of SIR increase	Filters short bursts from phonation/cough
Tune Recovery Time	Smoother deceleration post‑speech	Prevents oscillation after conversation stops
Trial RR OFF at rest	Diagnostic & symptomatic relief	Re‑enable with optimized titration for exercise needs

When it’s probably not RR

If symptoms occur without SIR or %RR increases, investigate oversensing/noise reversion from laryngeal/diaphragmatic myopotentials or respiratory motion. Consider modestly reducing ventricular sensitivity, extending post‑ventricular blanking, enabling rate‑smoothing, and checking for fusion/pseudofusion by EGM morphology and echo timing.

Documentation endpoints

• ΔHR, ΔSIR, %RR pacing during each task
• Symptom VAS and a symptom↔SIR concordance index
• Reproducibility across visits and relief with parameter changes

Clinical caveats: Reassess capture thresholds, impedance, and battery status to exclude end‑of‑service or high‑output programming as contributors. Individualize RR needs for exercise versus rest. This information is for educational purposes and does not replace clinician programming decisions.