MIT-BIH Arrhythmia DB, supraventricular premature beats (SVPB). 360 Hz; ectopic atrial beats interleaved with normal sinus QRS.
Standard analysis sees: time-irreversible (sharp rises, slow decay); multifractal. The atlas finds no named structure, but the source is distinctively extreme on E8 Lattice:std_profile (+4.2z) — beyond what the standard bank predicts for it.
E8 Lattice:std_profile | +4.2z | bank-miss 1.4σ |
H² × ℝ (Thurston):hyperbolic_variance | +2.2z | bank-miss 1.5σ |








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| Nearest neighbor | Distance | |
|---|---|---|
| ECG Normal | 1.98 | |
| ECG Ventricular | 2.50 | |
| ECG Fusion | 2.85 |
2-adic › 2-adic:distance_entropy | rank 3/298 | 2.2679 |
E8 Lattice › E8 Lattice:std_profile | rank 3/298 | 8.3756 |
H² × ℝ (Thurston) › H² × ℝ (Thurston):hyperbolic_variance | rank 3/298 | 3.3422 |