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Formulas.
| Carotid compliance (CC) | (2Δd/ds)/Δp |
| Carotid distensibility coefficient (DC) | (Δd/ds)/2Δp/πds2 |
| Ventricular elastance (Elv) | ESP/ESV-V0 |
| Arterial elastance (Ea) | ESP/SV |
| Arterial–ventricular coupling (AVC) | Ea/Elv |
Δd: change in arterial diameter; ds: systolic diameter; Δp: difference between the average systolic and the average diastolic blood pressures; ESP: end systolic pressure; ESV: end systolic volume; V0: theoretical volume when no pressure is generated; SV: stroke volume.
