Lab 12 Quiz - Arterial BP and Heart Sounds

What is the most common method of measuring system arterial blood pressure?

• Use of stethoscope and sphygmomanometer

When the BP cuff is first inflated, what has occurred to the brachial artery?

• Brachial artery collapsed; no sound

As pressure in the cuff is released, what occurs? What is this called?

• Pressure released allows slight blood flow through the artery makes a small sound: First Sound of Korotkoff

turbulant flow

As pressure in the cuff continues to release, what occurs?

• Pressure released more and more on artery; producing louder sounds at each systole

As pressure in the cuff is completely released what occurs? What is this called?

• No pressure on artery producing silence; Second Sound of Korotkoff

laminar flow

What is the first sound of korotkoff associated with relating to the heart?

• Systole (ventricular contraction)

What is the second sound of korotkoff associated with relating to the heart?

• Diastole (ventricular relaxation

How do you calculate pulse pressure?

• Systolic pressure — Diastolic pressure

What two components make up mean arterial pressure (MAP)?

1. Pulse pressure

2. Diastolic pressure

How do you calculate MAP?

• (Pulse pressure/3) + diastolic pressure

What is the first heart sound?

• Ventricular systole; closing of AV valves (lub)

low pressure in atria

What is the second heart sound?

• Ventricular diastole; closing of semilunar valves (dub)

low pressure in ventricles

What is the third heart sound?

MINOR heart sound

• Turbulence associated with filling of ventricles

What is the fourth heart sound?

MINOR heart sound

• Turbulence associated with atrial systole 

before ventricles contract and before closing AV valves

What is occurring to the pressure of atria and ventricles when AV valves open?

• Atria; greater pressure

• Ventricles; lower pressure

What is occurring to the pressure of atria and ventricles when AV valves close?

• Atria; lower pressure

• Ventricles; greater pressure

What is occurring to the pressure of ventricles and arteries when semilunar valves open?

• Ventricles; greater pressure

• Arteries; lower pressure

What is occurring to the pressure of ventricles and arteries when semilunar valves close?

• Ventricles; lower pressure

• Arteries; greater pressure

What happens to BP within 30 seconds of standing?

• Decreases 10-20 mmHg

What happens to BP after lying on your back for 5 minutes and then standing up?

• Increases 5-10 mmHg

What happens to BP after putting your hand in ice water?

• Increases 10-20 mmHg

What is systolic pressure?

• Highest arterial pressure in ventricular systole

What is diastolic pressure?

• Lowest arterial pressure in ventricular diastole

What do heart sounds measure?

• Arterial pressure