Miguel is a 25-year-old jogger with a target heart rate of 125 bpm. His resting pulse is 70 bpm. His blood volume is approximately 6.8 litres. At rest, his cardiac output is 6.3 litres/minute and his EDV is 150 ml. What is his stroke volume at rest?

Question

Jeremiah Alexander · Accepted Answer

#0.09 ("Liters")/("beat")" at rest"#

We will find the following equation to be useful:

#color(white)(aaaaaaaaaaaaaaa)color(blue)(CO = HR * SV)#

Where:

#"CO=cardiac output: volume of blood the hearts pumps out"# #color(white)(aaaaaa)"every minute (mL/min)"#

#"HR=heart rate:the number of beats per minute (beats/min)"#

#"SV= stroke volume:volume of blood pumped out by the"# #color(white)(aaaaaa)"heart in 1 beat (Liters/beat)"#

#---------------------#

Plug in, isolate the unknown, and solve.

Considering

#"CO" = 6.3 "Liters"/("min")color(white)(---)"HR" = 70 "beats"/("min")#

#color(orange)("Answer": "SV"= 0.09 ("Liters")/("beat")" at rest")#

Kai Andersen · Answer

undefined Miguel's stroke volume at rest is 42.5 ml.