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Physiology

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Cardiovascular System

Question
6 out of 12
 

The basal cardiac output in adults is:



A l0 liter
B 5.5liter

C 7.5 liter
D 6.5 liter

Ans. B 5.5liter
  1. CARDIAC OUTPUT is defined as the volume of blood pumped into the arterial system per minute (unit time).
  2. The stroke volume (about 80 ml) multiplied by the heart rate per minute is equal to the cardiac output.
  3. The normal cardiac output value in healthy adults varies between 2.5 to 6.0 liters per minute (average 5.5 liter).
  4. Output per minute per square meter of body surface area is known as CARDIAC INDEX (average 3.2 liter).
  5. Some factors affecting cardiac output are given below:

Increase Cardiac Output

Decrease Cardiac Output

No change

• Anxiety and excitement

• Eating

• Exercise

• High environmental temperature

• Pregnancy

• Epinephrine

• Histamine

• Sitting and standing from lying position

• Rapid arrhythmias

• Heart disease

• Sleep

• Moderate changes in environmental temperature

Cardiovascular System Flashcard List

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