Answer:
Stroke Volume Index (SVI) is derived by dividing the stroke volume (SV) by the body surface area (BSA). Mathematically, it can be expressed as: SVI = SV / BSA.
To calculate the SVI, you have the following values:
Stroke Volume (SV) = 55 mL
Body Surface Area (BSA) = 2.5 m²
Plug these values into the formula:
SVI = SV / BSA
SVI = 55 mL / 2.5 m²
SVI = 22 mL/m²
So, the Stroke Volume Index (SVI) is 22 mL/m².
Clinically, the SVI reflects the stroke volume adjusted for an individual's body surface area. It provides a more standardized measure of stroke volume, allowing for comparisons between individuals with different body sizes. It can be used to assess cardiac function and is an important parameter in cardiology and critical care medicine.
a. Preload: SVI can reflect the preload of the heart, which is the volume of blood in the ventricles at the end of diastole (before contraction).
b. Cardiac Function: It provides information about the heart's ability to pump blood effectively based on body size, which is important for assessing cardiac function.
c. Clinical Assessment: SVI is used in clinical assessments to evaluate cardiac output and overall cardiovascular health.
The cardiac index (CI) is calculated by dividing the cardiac output (CO) by the body surface area (BSA). Mathematically, it can be expressed as: CI = CO / BSA.
To calculate the CI, you have the following values:
Cardiac Output (CO) = 7 L/min
Body Surface Area (BSA) = 2.5 m²
Plug these values into the formula:
CI = CO / BSA
CI = 7 L/min / 2.5 m²
CI = 2.8 L/min/m²
So, the Cardiac Index (CI) is 2.8 L/min/m².
Step-by-step explanation: