CVICU Exam Questions and
Answers 100% Pass
SvO2 - CORRECT ANSWER-0.60-0.80 (60-80%)
From the yellow PA port for your MV
*Mixture is not arterial and venous*
*Different from ABG respiratory would get: that is SaO2 which should be >95*
SvO2= O2 delivered- o2 consumed
Supply Vs Demand
Mixture is a mixture of superior and inferior vena cava
The amount of oxygen still bound to hemoglobin after making it thought out body
to deliver oxygen. Cells only diffuse or use 20-40% of oxygen bound to
hemoglobin. Less O2 comes back more that the body REQUIRED from the
hemoglobin.
Affecting SvO2 - CORRECT ANSWER-*Increased SvO2*
Increased supply- increased lung function( FiO2), transfusion, increased CO
,Decreased consumption-hypothermia, late sepsis, fever reduction, anesthesia,
anlagesia, sedation, paralysis.
*Decreased SvO2*
Decreased supply-decreased CO, O2 sat, Hgb,
Increased consumption- fever, seizure, pain, WOB, excercise, agitation, suctioning,
metabolic rate
Stroke Volume (SV) - CORRECT ANSWER-50-100 ml/beat
SV=CO/HR
Low SV: Preload, Afterload, Contractility. hemorrhage, myocardial ischemia or
infarction, vasoconstriction, and mitral insufficiency.
High SV: vasodilation, hypervolemia
Stroke Volume Index (SVI) - CORRECT ANSWER-33-47 ml/m2/beat *from
slide deck*
Normal SVI: 35-60 ml/beat/m2 *from jonathan*
SVI= SV/BSA
Accounts for a person's body surface area.
Helps assess pump performance and contractility.
, Stroke Volume Variation (SVV) - CORRECT ANSWER-variation in SV given as a
percentage, >15% is alarming and could indicate hypovolemia, etc.
Cardiac Output (CO) - CORRECT ANSWER-4-8 L/min
CO= SV x HR
Performance of the heart as a pump
The amount of blood ejected from the heart in one minute
Hemodynamics - CORRECT ANSWER-Pressure= Flow x Resistance
Flow (CO): Volume, Contraction
Resistance (SVR): Lumen Size
Preload - CORRECT ANSWER-*VOLUME*
The stretch produced within the ventricle at the end of diastole
Right side: CVP (2-8 mm Hg)
Left side: PAWP (8-12 mm Hg)
Affecting Preload - CORRECT ANSWER-Decreased: hemorrhage, dehydration
,third spacing, venous dilation, loss of "atrial kick" *give volume or albumin*
Increased: valve disease, ventricular failure, volume overload, cardiac tamponade,
*diuretics, vasodilators*
Afterload - CORRECT ANSWER-*Resistance*
Answers 100% Pass
SvO2 - CORRECT ANSWER-0.60-0.80 (60-80%)
From the yellow PA port for your MV
*Mixture is not arterial and venous*
*Different from ABG respiratory would get: that is SaO2 which should be >95*
SvO2= O2 delivered- o2 consumed
Supply Vs Demand
Mixture is a mixture of superior and inferior vena cava
The amount of oxygen still bound to hemoglobin after making it thought out body
to deliver oxygen. Cells only diffuse or use 20-40% of oxygen bound to
hemoglobin. Less O2 comes back more that the body REQUIRED from the
hemoglobin.
Affecting SvO2 - CORRECT ANSWER-*Increased SvO2*
Increased supply- increased lung function( FiO2), transfusion, increased CO
,Decreased consumption-hypothermia, late sepsis, fever reduction, anesthesia,
anlagesia, sedation, paralysis.
*Decreased SvO2*
Decreased supply-decreased CO, O2 sat, Hgb,
Increased consumption- fever, seizure, pain, WOB, excercise, agitation, suctioning,
metabolic rate
Stroke Volume (SV) - CORRECT ANSWER-50-100 ml/beat
SV=CO/HR
Low SV: Preload, Afterload, Contractility. hemorrhage, myocardial ischemia or
infarction, vasoconstriction, and mitral insufficiency.
High SV: vasodilation, hypervolemia
Stroke Volume Index (SVI) - CORRECT ANSWER-33-47 ml/m2/beat *from
slide deck*
Normal SVI: 35-60 ml/beat/m2 *from jonathan*
SVI= SV/BSA
Accounts for a person's body surface area.
Helps assess pump performance and contractility.
, Stroke Volume Variation (SVV) - CORRECT ANSWER-variation in SV given as a
percentage, >15% is alarming and could indicate hypovolemia, etc.
Cardiac Output (CO) - CORRECT ANSWER-4-8 L/min
CO= SV x HR
Performance of the heart as a pump
The amount of blood ejected from the heart in one minute
Hemodynamics - CORRECT ANSWER-Pressure= Flow x Resistance
Flow (CO): Volume, Contraction
Resistance (SVR): Lumen Size
Preload - CORRECT ANSWER-*VOLUME*
The stretch produced within the ventricle at the end of diastole
Right side: CVP (2-8 mm Hg)
Left side: PAWP (8-12 mm Hg)
Affecting Preload - CORRECT ANSWER-Decreased: hemorrhage, dehydration
,third spacing, venous dilation, loss of "atrial kick" *give volume or albumin*
Increased: valve disease, ventricular failure, volume overload, cardiac tamponade,
*diuretics, vasodilators*
Afterload - CORRECT ANSWER-*Resistance*
