What is the pressure in the Right Ventricle (RV)?
20-30 mmHg Systolic 3-7 mmHg Diastolic
What is the pressure in the Left Ventricle (LV)?
120-125 mmHg Systolic 2-5 mmHg Diastolic
What is the function of valves in the heart?
Open and close to help blood move along its path.
What are the valves that blood flows through from the right atrium to the lungs?
What are the valves that blood flows through from the left atrium to the body?
What do papillary muscles do?
Attach to the mitral and tricuspid valves, prevent bulging backward during contraction.
What are the three main types of heart valve problems?
What is regurgitation in heart valves?
Backward flow of blood due to improper closure of a valve; can involve prolapse.
What is stenosis in heart valves?
Thickening or stiffening of valve leaflets, restricting the opening.
What does atresia mean regarding heart valves?
A valve is missing.
What is the significance of pressure gradients in heart valves?
Valves close when backward pressure gradient occurs; open with forward pressure gradient.
What are the three main types of heart valve problems?
What does Atresia mean?
A valve is missing.
What occurs during systole?
Contraction phase; electrical and mechanical events occur, ending with maximum muscle activation.
What happens during diastole?
Relaxation phase; contractile properties return to resting state.
What does the A wave represent in the cardiac cycle?
Atrial contraction.
What does the C wave indicate?
Slight backflow of blood into atria during ventricular contraction; bulging of mitral valve.
What does the V wave represent?
Slow flow of blood into the atria from the pulmonary veins.
What is isovolumic contraction?
Ventricular contraction with no blood volume change; all valves are closed.
What is isovolumic relaxation?
Ventricular relaxation with no blood volume change; all valves are closed.
What is diastasis?
Mid portion of diastole when atrial and ventricular pressures equilibrate; mitral flow nearly ceases.
What is preload?
Volume of blood received by the heart; essentially stretch.
What is afterload?
Pressure or resistance the heart must overcome to eject blood; essentially squeeze.
What is cardiac output (CO)?
Net volume of blood ejected by the left ventricle per minute; CO = HR x SV.
What is stroke volume (SV)?
Volume of blood ejected by the left ventricle each beat; SV = EDV - ESV.
What is the ejection fraction (EF) formula?
EF = (SV / EDV) • 100.
What is the systolic blood pressure value?
Approximately 120 mmHg.
What is Ejection Fraction (EF)?
Fraction of blood ejected by the ventricle relative to its end-diastolic volume.
How is Ejection Fraction (EF) calculated?
EF = (SV / EDV) • 100
What is the Systolic Blood Pressure?
~120 mm Hg
What is the Diastolic Blood Pressure?
~80 mm Hg
What is the End Diastolic Volume (EDV)?
~120 mL
What is the End Systolic Volume (ESV)?
~50 mL
What does the Cardiac Pressure-Volume (PV) Loop plot?
Changes in ventricular pressure associated with changes in volume during one cardiac cycle.
What happens at point A in the PV Loop?
Mitral valve opens and ventricle fills to End-Diastolic Volume (EDV).
What happens at point B in the PV Loop?
Mitral valve closes and isovolumic contraction initiates (End-Diastolic Pressure, EDP).
What happens at point C in the PV Loop?
Aortic Valve opens, ventricle contracts, volume decreases as blood is pumped into aorta.
What happens at point D in the PV Loop?
Aortic Valve closes, ventricular pressure drops without volume change (End-Systolic Pressure, ESP).
What is Preload?
Essentially EDV or EDP; increases with increased venous return.
What is Afterload?
Resistance to blood ejection; increases with aortic pressure.
What is the effect of increased Afterload on Stroke Volume?
Increase ESP, decrease in Stroke Volume.
What is the Frank-Starling Relationship?
Intrinsic relationship between EDV and SV; reflects heart's ability to change contraction force.
What happens to ventricular muscle during relaxation?
It accommodates the increasing volume.
What is Cardiac Hypertrophy?
Abnormal enlargement or thickening of the heart muscle.
What are the classifications of Heart Failure?
Systolic HF, Diastolic HF, Ischemic, Non-Ischemic.
What is Myocardial Infarction (MI)?
A type of Ischemic Heart Disease (IHD).
What is Hypertrophic Cardiomyopathy?
A type of heart muscle disease that leads to heart failure.
What is Decompensated Heart Failure?
A progression from compensated heart failure indicating worsening condition.
What are the major arteries mentioned?
What are the major veins mentioned?
What are the heart valves listed?
What is Mitral Valve Regurgitation?
What is the opening between atria called?
Atrial Septal Defect (ASD)
What is the opening between ventricles called?
Ventricular Septal Defect (VSD)
What are the phases of the cardiac cycle?
What is afterload?
Resistance the left ventricle must overcome to circulate blood.
What is preload?
Volume of blood in ventricles at end of diastole (end diastolic pressure).
What factors increase afterload?
What factors increase preload?
What is cardiac output?
Heart Rate x Stroke Volume
What happens during isovolumic contraction?
What does stroke work (SW) represent?
Work of ventricles to eject a volume of blood (to eject Stroke Volume).
How is cardiac output measured?
Using the Fick principle.
What is the Fick principle used for?
Measuring cardiac output
What does pulse pressure measure?
Throbbing pulsation in an artery during systole
How is pulse pressure calculated?
Pulse pressure = systolic blood pressure - diastolic blood pressure
What is stroke volume?
Blood volume ejected by left ventricle during each heartbeat, measured in mL
How is stroke volume calculated?
Stroke volume = end-diastolic volume - end-systolic volume
What is the ejection fraction?
Percentage of blood ejected from the left ventricle during contraction
What are the key components of the cardiac cycle?
What are the pressure-volume loops used for?
Visualizing cardiac function and alterations in preload and afterload
What does cardiac preload refer to?
The initial stretching of the cardiac muscle fibers before contraction
What does cardiac afterload refer to?
The resistance the heart must overcome to eject blood
What is the Frank-Starling relationship?
The relationship between stroke volume and end-diastolic volume
What is the role of the mitral valve?
Regulates blood flow from the left atrium to the left ventricle
What is the role of the aortic valve?
Regulates blood flow from the left ventricle to the aorta
What does the Fick principle measure?
Cardiac output
What are the components of the pressure-volume loop?
What increases during isovolumetric contraction?
Aortic pressure
What is EDV?
End-Diastolic Volume
What does increased preload affect?
Stroke volume and contractility
What is the Frank-Starling relationship?
Length-tension relationship of cardiac muscle
What happens at low EDV?
Weak contraction due to sarcomere stretching
What is the effect of positive inotropic agents?
Increase contractility and stroke volume
What is the effect of negative inotropic agents?
Decrease contractility and stroke volume
What does cardiac afterload refer to?
Resistance the heart must overcome to eject blood
What does the Law of Laplace relate to?
Wall tension in relation to pressure and radius
What is the role of venous return?
Intrinsic control of stroke volume
What is the result of increased preload on stroke work?
Increased stroke volume and contraction strength
What is the relationship between sarcomere length and contraction strength?
Optimal overlap between actin and myosin increases contraction strength
What is measured in cardiac and vascular function curves?
Stroke volume, ejection fraction, and cardiac output
What happens during diastole?
Ventricle loading with blood, stretching cardiac muscle
What is ejection fraction (EF)?
Percentage of blood ejected from the ventricle
What is the positive inotropic effect?
Increases the force of heart contractions.
What is the negative inotropic effect?
Decreases the force of heart contractions.
What does EDV stand for?
End-diastolic volume.
What does ESV stand for?
End-systolic volume.
What is the Fick principle used for?
Measuring cardiac output.
What does stroke volume represent?
The amount of blood pumped by the heart in one contraction.
What is the ejection fraction?
The percentage of blood ejected from the heart during contraction.
What occurs at point A in the cardiac cycle?
The atrium is relaxed; the ventricle is relaxed.
Why doesn’t ventricular pressure increase substantially from A to B?
Ventricular volume is increasing without significant resistance.
What event begins around A and continues until B?
Filling of the ventricle with blood.
At what points do the mitral and aortic valves open?
Mitral valve opens before point A; aortic valve opens after point B.
What event begins at point B and continues until D?
Ejection of blood from the ventricle.
Why does pressure increase without a change in volume from B to C?
Ventricular contraction occurs, increasing pressure against closed valves.
What factors affect pressure and volume changes from C to D?
Ventricular contraction strength and resistance in the aorta.
Why does the aortic valve close at point D?
Pressure in the ventricle falls below aortic pressure.
At what point(s) are both the aortic and mitral valves closed?
From point C to point D.
What is the approximate aortic pressure at its highest?
Around 120 mm Hg.
What is HFrEF?
Heart failure with reduced ejection fraction (EF <40%).
What is HFmrEF?
Heart failure with mid-range or mildly reduced ejection fraction (EF 40-49%).
What is HFpEF?
Heart failure with preserved ejection fraction (EF >50%).
What is concentric hypertrophy?
Increased myocyte size with maintained chamber size.
What is eccentric hypertrophy?
Increased myocyte size with increased chamber size.
What are the valves that blood flows through from the right atrium to the lungs?
What are the valves that blood flows through from the left atrium to the body?
What do papillary muscles do?
Attach to the mitral and tricuspid valves, prevent bulging backward during contraction.
What is regurgitation in heart valves?
Backward flow of blood due to improper closure of a valve; can involve prolapse.
What is stenosis in heart valves?
Thickening or stiffening of valve leaflets, restricting the opening.
What is the significance of pressure gradients in heart valves?
Valves close when backward pressure gradient occurs; open with forward pressure gradient.
What occurs during systole?
Contraction phase; electrical and mechanical events occur, ending with maximum muscle activation.
What does the C wave indicate?
Slight backflow of blood into atria during ventricular contraction; bulging of mitral valve.
What is isovolumic contraction?
Ventricular contraction with no blood volume change; all valves are closed.
What is isovolumic relaxation?
Ventricular relaxation with no blood volume change; all valves are closed.
What is diastasis?
Mid portion of diastole when atrial and ventricular pressures equilibrate; mitral flow nearly ceases.
What is afterload?
Pressure or resistance the heart must overcome to eject blood; essentially squeeze.
What is cardiac output (CO)?
Net volume of blood ejected by the left ventricle per minute; CO = HR x SV.
What is stroke volume (SV)?
Volume of blood ejected by the left ventricle each beat; SV = EDV - ESV.
What is Ejection Fraction (EF)?
Fraction of blood ejected by the ventricle relative to its end-diastolic volume.
What does the Cardiac Pressure-Volume (PV) Loop plot?
Changes in ventricular pressure associated with changes in volume during one cardiac cycle.
What happens at point A in the PV Loop?
Mitral valve opens and ventricle fills to End-Diastolic Volume (EDV).
What happens at point B in the PV Loop?
Mitral valve closes and isovolumic contraction initiates (End-Diastolic Pressure, EDP).
What happens at point C in the PV Loop?
Aortic Valve opens, ventricle contracts, volume decreases as blood is pumped into aorta.
What happens at point D in the PV Loop?
Aortic Valve closes, ventricular pressure drops without volume change (End-Systolic Pressure, ESP).
What is the effect of increased Afterload on Stroke Volume?
Increase ESP, decrease in Stroke Volume.
What is the Frank-Starling Relationship?
Intrinsic relationship between EDV and SV; reflects heart's ability to change contraction force.
What is Decompensated Heart Failure?
A progression from compensated heart failure indicating worsening condition.
What are the major arteries mentioned?
What are the heart valves listed?
What is Mitral Valve Regurgitation?
What are the phases of the cardiac cycle?
What factors increase afterload?
What happens during isovolumic contraction?
What does stroke work (SW) represent?
Work of ventricles to eject a volume of blood (to eject Stroke Volume).
How is pulse pressure calculated?
Pulse pressure = systolic blood pressure - diastolic blood pressure
What is the ejection fraction?
Percentage of blood ejected from the left ventricle during contraction
What are the key components of the cardiac cycle?
What are the pressure-volume loops used for?
Visualizing cardiac function and alterations in preload and afterload
What does cardiac preload refer to?
The initial stretching of the cardiac muscle fibers before contraction
What is the Frank-Starling relationship?
The relationship between stroke volume and end-diastolic volume
What is the role of the mitral valve?
Regulates blood flow from the left atrium to the left ventricle
What is the result of increased preload on stroke work?
Increased stroke volume and contraction strength
What is the relationship between sarcomere length and contraction strength?
Optimal overlap between actin and myosin increases contraction strength
What is measured in cardiac and vascular function curves?
Stroke volume, ejection fraction, and cardiac output
Why doesn’t ventricular pressure increase substantially from A to B?
Ventricular volume is increasing without significant resistance.
At what points do the mitral and aortic valves open?
Mitral valve opens before point A; aortic valve opens after point B.
Why does pressure increase without a change in volume from B to C?
Ventricular contraction occurs, increasing pressure against closed valves.
What factors affect pressure and volume changes from C to D?
Ventricular contraction strength and resistance in the aorta.
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