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Principal cardiac interval results of the buttocks electrocardiogram compared with Lead II for the normative and heart failure cohorts.
| Study Cohort | HRa (SD), in bpm | HRVb (SD), in ms | QRSc, (SD), in ms | QTcd (SD), in ms |
| Normative | −0.0 (0.3) | −1.0 (3.4) | −0.5 (6.6) | 14.5 (11.1) |
| Heart failure | 0.0 (0.3) | −6.6 (13.2) | 2.9 (11.5) | 11.2 (19.1) |
| Cumulative | 0.0 (0.3) | −3.4 (9.4) | 0.9 (9.1) | 13.2 (15.0) |
aHR: heart rate.
bHRV: heart rate variability.
cQRS: QRS duration.
dQTc: correct QT interval.
