Question

A patient went to see a cardiologist complaining about being tachycardic. Upon examination, his heart rate was found to be 90 beats per minute; his end-diastolic volume was found to be 140 mL per minute whereas his end- systolic volume was 60 mL per minute. What was his calculated cardiac output per minute? ?​

Answer 1

Answer:

Tachycardia is the medical term for a heart rate over 100 beats per minute. There are many heart rhythm disorders (arrhythmias) that can cause tachycardia.

Answer 2

Answer:

The total cardiac output in the patient was 7200 mL or 7.2 L per minute.

Explanation:

Stroke volume (SV) is the total volume of blood pumped by the left ventricle per heartbeat. Stroke volume can be calculated by calculating the difference between end-diastolic volume (EDV) and end-systolic volume (ESV).

SV = EDV- ESV

$SV = 140-60 = 80 mL$

So the stroke volume is 80 mL.

Total cardiac output (TCO) is determined by aiming at the total blood pumped by both the ventricles per minute. TCO can be calculated by multiplying heart rate (HR) with stroke volume (SV).

TCO = HR X SV

$TCO = 90 \times 80 = 7200$

The total cardiac output in the patient was 7200 mL or 7.2 L per minute.