11 Questions
What is the equation for cardiac output (Q)?
Q = SV * HR
What is the equation for mean arterial pressure (MAP)?
MAP = 1/3 SBP + 2/3 DBP
What is the equation for resistance?
Resistance = pressure/flow
What is the formula for ejection fraction?
SV/EDV * 100
What does the VD/VT ratio measure?
Gas exchange efficiency
What is the equation for alveolar ventilation (VA)?
(VT - VD) * frequency
What is the formula for arterial-venous oxygen difference (a-vO2diff)?
arterial - venous
What is the equation for critical power?
VO2 * 5 * time
What is the formula for mechanical efficiency?
external work accomplished/energy expended * 100
What is the equation for gross efficiency?
WR * 0.00234/VO2 * 5
What is the formula for net efficiency?
WR * 0.00234/(VO2_2 - VO2_1) * 5
Study Notes
Cardiopulmonary Equations
- Cardiac output (Q) is calculated by: Q = Heart Rate (HR) × Stroke Volume (SV)
- Mean arterial pressure (MAP) is calculated by: MAP = (2 × Diastolic Pressure + Systolic Pressure) / 3
- Resistance (R) is calculated by: R = Mean arterial pressure (MAP) / Cardiac output (Q)
- Ejection fraction (EF) is calculated by: EF = (End-diastolic volume - End-systolic volume) / End-diastolic volume
Respiratory Equations
- VD/VT ratio measures the dead space ventilation, which is the ratio of dead space volume (VD) to tidal volume (VT)
- Alveolar ventilation (VA) is calculated by: VA = (Respiratory Rate × (Tidal Volume - Dead Space Volume))
Oxygen Uptake and Efficiency
- Arterial-venous oxygen difference (a-vO2diff) is calculated by: a-vO2diff = Arterial oxygen content - Venous oxygen content
- Critical power (CP) is the highest power output that can be sustained over a long period of time
- Mechanical efficiency (ME) is calculated by: ME = (Work output / Energy expenditure) × 100
- Gross efficiency (GE) is calculated by: GE = (Work output / Energy expenditure including anaerobic and aerobic) × 100
- Net efficiency (NE) is calculated by: NE = (Work output / Energy expenditure from aerobic sources only) × 100
Test your knowledge of cardiovascular physiology and hemodynamics with this quiz. Explore equations for cardiac output, stroke volume, resistance, pressure, flow, and more. Master concepts such as mean arterial pressure, blood viscosity, and compliance in the cardiovascular system.
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