If a patient has a stroke volume of 70ml and a heart rate of 90 bpm, what would be their cardiac output?

To determine cardiac output, the formula used is:

Cardiac Output (CO) = Stroke Volume (SV) x Heart Rate (HR).

In this scenario, the stroke volume is given as 70 ml and the heart rate is 90 beats per minute (bpm). By plugging these values into the formula, the calculation would look like this:

CO = 70 ml/beat x 90 beats/minute = 6300 ml/minute.

This calculation shows that the total volume of blood pumped by the heart in one minute is 6300 ml. This output is significant for assessing the efficiency of the heart's function, as it reflects the volume of blood delivered to the body and the needs of the tissues per minute. Therefore, the correct answer to the question is that the cardiac output is 6300 ml/minute.