If the heart rate is 80 beats per minute, how long is one beat? ...

[javeds]

If the heart rate is 80 beats per minute, how long is one beat?
 
  a. 0.75 second
  b. 0.9 second
  c. 1 second
  d. 1.3 second

Question 2

Calculate the stroke volume (SV) and the stroke volume index (SI) using the following infor-mation: cardiac output = 4.5 L/min, heart rate = 110 beats/min, and body surface area = 1.3 m2.
 
  a. SV = 41 mL; SI = 31.5 mL/m2
  b. SV = 45 mL; SI = 34.3 mL/m2
  c. SV = 46 mL; SI = 36 mL/m2
  d. SV = 49.5 mL; SI = 38 mL/m2

[Mollythedog]

Answer to Question 1

ANS: D
Cardiac cycle time = heart rate (HR)/60

Answer to Question 2

ANS: A
Stroke volume (SV) = cardiac output (C.O.)/heart rate (HR) and stroke index (SI) = stroke vol-ume (SV)/body surface area (BSA)