Is there an easy way to measure Stroke Volume?

Question by Scuba: Is there an easy way to measure Stroke Volume?
I am wondering about Cardiac Output. Can I use Diastolic pressure minus systolic pressure to come up with the stroke volume.
So then all I need to do is multiply Heart Rate by Stroke Volume. Does this work, or am I completely wrong with this.

Best answer:

Answer by The Man
Wiki says that in healthy young subjects, each additional 2 ml of stroke volume results in a 1 mmHg rise in pressure.

Stroke Volume = 2 ml × Pulse Pressure
Cardiac Output = 2 ml × Pulse Pressure × Heart Rate

Pulse Pressure is the difference between the maximal and minimal pressure.

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