Table 5.
Rest and stress algorithm set
| Calculated values | Method | Measure unit |
|---|---|---|
| Body Surface Area (BSA, at rest) | Sq.Root {(Kg.)*(Cm.)/(3600)} | M2 |
| (rest, and peak stress) | ||
| Stroke Volume (SV) | EDV - ESV | mL |
| Cardiac Output (CO) | stroke volume * heart rate | L/min |
| Mean Arterial Pressure (MAP) | (SBP-DBP)/3 + DBP | mmHg |
| Pulse Pressure (PP) | SBP-DBP | mmHg |
| End Systolic Pressure (ESP) | SBP * 0.9 | mmHg |
| LV Elastance (Ees) index | ESP/ESV * BSA -1 | mmHg/mL/m2 |
| Effective arterial elastance index (Eai) | ESP/SV * BSA -1 | mmHg/mL/m2 |
| Ventricular-Arterial Coupling (VAC) | Ees/Ea = (ESP/ESV)/(ESP/SV) = SV/ESV | ratio |
| Systemic Vascular Resistance (SVR) | 80 * (MAP- 5) ⁄ Cardiac output | (dyne*sec)/cm5 |
| systemic arterial Compliance (C) | Stroke Volume/Pulse Pressure | mL/mmHg |
| Mitral E/e' | ratio | |
| Diastolic Mean Filling Rate | (SVi/Cardiological Diastolic Time) × 1,000 | mL/m2 × sec-1 |
| Diastolic time/systolic time ratio | M-Mode or Sensor | ratio |
| And, for right heart function: | ||
| Pulmonary Artery Systolic Pressure (PASP) | 4×(Tricuspid regurgitant velocity)2 + Right Atrium Pressure | mmHg |
| Pulmonary Artery Diastolic Pressure (PADP) | 4×(Pulmonary artery end-diastolic velocity)2 + Right Atrium Pressure | mmHg |
| Mean PA Pressure(MPAP) | 1/3(SPAP) + 2/3(PADP). | mmHg |
| Mean PA Pressure (MPAP) | 4×Peak pulmonary regurgitant velocity2 | mmHg |
| Pulmonary Artery Pulse Pressure (PAPP) | 4×(Tricuspid regurgitant velocity)2 - 4×(Pulmonary artery end-diastolic velocity)2 | mmHg |
| Pulmonary Vascular Resistance (PVR) | PVR = 80 × (MPAP - PCWP)/CO | (dyne*sec)/cm5 |
| Pulmonary Vascular Resistance (PVR) | 10 × Tricuspid regurgitant velocity/PTVI |
Woods units X 80 = (dyne*sec)/cm5 |
| Pulmonary Vascular Capacitance (PVC) | Stroke Volume/Pulmonary Artery Pulse Pressure | mL/mmHg |
SBP = Systolic blood pressure; DBP = Diastolic blood pressure; TR = Tricuspid regurgitation; EDV = End-diastolic volume; ESV = End-systolic volume; RV = Right ventricular; PCWP = Pulmonary capillary wedge pressure; PTVI = Pulmonary time velocity integral; MPAP = Mean pulmonary artery pressure; SPAP = Systolic pulmonary artery pressure; PADP = Pulmonary artery diastolic pressure; MAP = Mean arterial pressure; SV = Stroke volume