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RT Hemodynamics

Normal values for cardiac pressures and oxygenation status

QuestionNormal Values
Right Arterial Press aka Central Venous Pressure(CVP)(RVEDP) 0-8 mmHg
Right Ventricular Pressure 15-25 mmHg Systolic 0-8 mmHg Diastolic
Pulmonary Artery Pressure 15-25 mmHg Systolic 8-15 mmHg Diastolic
Left Arterial Pressure aka Pulmonary Capillary Wedge Pressure 4-12 mmHg *Value is same as LVEDP
Left Ventricular Pressure 110-130 mmHg Systolic 4-12 mmHg Diastolic (LVEDP)
Mean PA Pressure 10-20 mmHg *Mean Press=[Sys + 2(Diast)]/3
Systemic Vascular Resistance (SVR) 900-1500 dynes x sec x cm^-5 *SVR=[MAP-CVP]/CO x 80
Pulmonary Vascular Resistance (PVR) 25-250 dynes x sec x cm^-5 *PVR=[Mean PAP-PCWP]/CO x 80
Arterial Blood Pressure 100-140 mmHg Systolic 60-90 mmHg Diastolic
Mean Arterial Blood Pressure 70-100 mmHg *Mean Press=[Sys + 2(Diast)]/3
Cardiac Output 4-8 lpm *SV x HR = CO
Cardiac Index (CI) 2.5-4 l/min/m² *CI= CO/BSA
Heart Rate 60-100 bpm
Stroke Volume 60-130 ml
Ejection Fraction 50-70% <30% indicate imminent heart failure
Mixed Venous Oxygen Saturation (SvO2) 60-80%
Oxygen Content-Aterial (CaO2) Normal: 20 vol%
Oxygen Content-Venous (CvO2) Normal: 15 vol%
Oxygen Extraction C(a-v)O2 Normal: 5 vol%
How is the oxygen content determined? By adding O2 attached to Hgb (1.34xHgbx%sat) to the amount dissolved in plasma (PO2x0.003)
Oxygen Delivery/Transport (Do2) Normal: 750-1000 ml/min
Oxygen Consumption (VO2) Normal: 250 ml/min
Capillary Content of Oxygen (CcO2) Calculated value based on Hbg and alveolar air
Shunt Normal: <10%; 20-30% considered significant; >30% life threatening
Fick Equation VO2/[C(a-v)O2 x10]=CO also VO2=COx [C(a-v)O2x10]
Created by: JimStry