Factors That Deterine Arterial Blood Pressure

Question 1

What is an arterial pulse?

Answer 1

This is where the blood pumped into aorta, stretches the wall and creates a pressure wave. This is transmitted through the walls of the arterial system.

Question 2

What is a normal heart rate?

Answer 2

60-100 beats per minute

Question 3

What is bradycardia?

Answer 3

Overly slow heart rate. < 60 bpm

Question 4

What is tachycardia?

Answer 4

Overly rapid heart rate ( >100bpm)

Question 5

If you have a strong pulse, what’s your stroke volume?

Answer 5

Stroke volume would be high.

Question 6

Describe arterial blood pressure?

Answer 6

This is the systolic pressure / diastolic pressure.
Systolic pressure is the rising pressure in the process of ventricular systole.
Diastolic pressure is the pressure during relaxation and reads the elastic recoil of the arteries.

Question 7

what’s arterial blood pressure measured in?

Answer 7

mmHg (mercury)

Question 8

What factors determine arterial BP?

Answer 8

• the amount of blood being pumped out (cardiac output)
  -resistance to the flow (total peripheral resistance - resistance of arterioles)
  BP = CO x TPR

Question 9

What are the factors affecting cardiac output?

Answer 9

• if heart contracts with less strength and reduces stroke volume and CO
• if the blood volume is low and heart fills less this reduces stroke volume and CO

Question 10

How does peripheral resistance cause arterial pressure higher?

Answer 10

The contraction of smooth muscle cause the arterioles to constrict. This increases the resistance again the flow of blood and increases the pressure.