Cardiac Values

Question 1

What is Rate Pressure Products and what does is measure?

Answer 1

AKA Double Pressure Product

RPP = HR x SBP

The pressure (workload) on the heart; predictor of myocardial oxygen demand

Question 2

What is Cardiac Output

Answer 2

CO = SV x HR (Units in L/minute)

Amount of blood pumped out from the heart per minute

Question 3

How Does HR and Cardiac Output correlate with increasing with work rate?

Answer 3

HR increases linearly, will eventually hit steady state

CO increases linearly with work rate

Question 4

When does HR and CO reach a plateau?

Answer 4

100% VO2 Max

Question 5

Blood pressure changes with increasing work rate?

Answer 5

MAP increases linearly

SBP increases

DBP remains fairly constant

Question 6

What amount of change to DBP during exercise should raise a concern?

Answer 6

Above or below 10 mmHg from their baseline.

Question 7

How do Sympathetic and Parasympathetic stimulation influence HR?

Answer 7

Parasympathetics: Slows down HR
Sympathetics: Increases HR

Question 8

What components influence stroke volume

Answer 8

Contraction Strength: Increases with increase contraction strength

End Diastolic Volume;Preload: Increases via Frank-Starling Mechanism

Increased TPR; Afterload, decresease SV

Question 9

What is the formula for MAP?

Answer 9

MAP = CO x TPR

OR