The normal stroke volume, which is the amount of blood pumped out of the heart with each beat, typically ranges from 50 to 100 ml. This volume represents the difference between the end-diastolic volume (the amount of blood in the heart before a contraction) and the end-systolic volume (the amount of blood remaining after contraction).
Here's a breakdown of what that means:
- Stroke Volume Defined: Stroke volume (SV) is the volume of blood ejected from the left ventricle per beat.
- Calculation: SV is calculated as: End-diastolic volume (EDV) - End-systolic volume (ESV).
- Normal Range: As stated in the reference, a normal stroke volume is between 50 and 100 ml.
- Measurement: In intensive care settings, stroke volume is often measured using a pulmonary artery catheter, and is frequently used in determining cardiac output.
- Importance: Adequate stroke volume is essential for delivering sufficient oxygen and nutrients to the body.
| Parameter | Description | Normal Range |
|---|---|---|
| End-Diastolic Volume | Volume of blood in the ventricle at the end of diastole (filling) | Varies |
| End-Systolic Volume | Volume of blood remaining in the ventricle after systole (contraction) | Varies |
| Stroke Volume | Volume of blood ejected from the ventricle per beat (EDV - ESV) | 50 - 100 ml |
While a range of 50-100ml is considered normal, individual values can vary due to factors such as age, sex, body size, and physical condition.
