don't difference rr beats across holes (irregular rhythm, cardio stager) - #81
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Reviewer's GuideUpdates irregular-rhythm and cardio-stager HRV calculations to avoid differencing beats across dropped runs, rejected beats, and timestamp holes by deriving explicit continuity seams; adds regression tests for both paths. Resulting staging and irregular-rhythm outputs may change, requiring an edge kAlgoVersion bump when repinning. Sequence diagram for seam-aware irregular rhythm screeningsequenceDiagram
participant Input as Compacted RR input
participant Screen as irregularBeatScreen
participant Times as nnTimesMs
participant Metrics as HRV metrics
Input->>Screen: receive rrMs and keep mask
Screen->>Times: check elapsed beat time
alt contiguous successor
Times-->>Screen: successive = true
Screen->>Metrics: difference adjacent RR beats
else dropped run or time hole
Times-->>Screen: successive = false
Screen->>Metrics: skip seam difference
end
Screen-->>Input: irregular rhythm result
Sequence diagram for seam-aware cardio staging metricssequenceDiagram
participant Stager as Cardio stager
participant Cleaner as _cleanBeatsInWindow
participant RMSSD as _windowRmssd
participant Rk as _websterRescore
Stager->>Cleaner: clean beats in window
Cleaner-->>Stager: beats and seam markers
Stager->>RMSSD: calculate window differences
RMSSD->>RMSSD: skip seam pairs
Stager->>Rk: calculate R(k) differences
Rk->>Rk: skip seam pairs
RMSSD-->>Stager: seam-aware RMSSD
Rk-->>Stager: seam-aware R(k)
Flow diagram for seam-aware HRV differencingflowchart LR
A[RR beats and timestamps] --> B{True successor?}
B -->|Yes| C[Include successive difference]
B -->|Dropped run, rejected beat, or time hole| D[Mark seam]
D --> E[Skip difference]
C --> F[HRV metrics]
E --> F
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📝 WalkthroughWalkthroughClinical rhythm screening and sleep cardio window calculations now exclude interval differences across timestamp gaps and rejected beats. Clinical window validity and sleep cardio metrics use counts of contiguous pairs. Regression tests cover fragmented windows and sequence breaks. ChangesRR Continuity Filtering
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🔵 Low · up to The change is mergeable with awareness that one sustained-window test uses unrealistic beat timing. Rebalancing that fixture would strengthen confidence in the result without addressing a demonstrated runtime failure. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 1
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Inline comments:
Review comments at @test/onehz/irregular_rhythm_test.dart:
- Line 80: Update the sustained-window fixture around the `step` calculation so
timestamps are accumulated from the RR intervals in `b`, rather than compressed
into the five-minute layout. Rebalance the fixture or use a larger explicit
window while preserving a positive untimed aggregate assertion and exercising
the intended two-of-twelve result with RR-consistent timing.
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📒 Files selected for processing (4)
lib/src/onehz/clinical/irregular_rhythm.dartlib/src/onehz/sleep/cardio_stager.darttest/onehz/irregular_rhythm_test.darttest/onehz/real_night_cardio_stager_test.dart
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irregularBeatScreen only broke pairs at its own 300-2000 filter. callers pass correctRr nn which is already compacted, so beats either side of a dropped run or a dropout got differenced and inflated sd1 / pnn70. now uses the same nnTimesMs seam test hrv_time does.
cardio stager window gather had the same thing: a step-rejected beat or an rr hole left its neighbours adjacent in beats, so window rmssd and r(k) took one big diff per seam (a 400ms jump got through a 200ms gate). gather now marks seams and both skip them.
staging and irregular rhythm outputs change, edge needs a kAlgoVersion bump on repin.
Summary by Sourcery
Exclude discontinuous beat pairs from irregular-rhythm and cardio-staging calculations so artifact gaps and dropouts cannot inflate variability metrics or produce false flags.
Bug Fixes:
Enhancements:
Tests:
Summary by CodeRabbit