There are various methods for assessing the global contractility of the left ventricle.

The following calculations are used:

• Ejection fraction.
• Fractional shortening.
• Stroke volume.
• Minute volume.
• Heart index.

 

Ejection Fraction

The Ejection Fraction (EF%) is the percentage ratio of the systolic volume of the left ventricle to the diastolic volume.

 

 

LVEDV - Left ventricular end-diastolic volume. LVESV - Left ventricular end-systolic volume.

 

The volume of the left ventricle can be measured using the Single plane or Biplane method.

If using the Single plane method end-systolic and end-diastolic volume is better to measure in Apical four-chamber position.

If using the Biplane method end-systolic and end-diastolic volume is measured in two orthogonal positions (Apical four-chamber and Apical two-chamber view).

 

EF% calculation. Single Plane Method. Measurement of the end-diastolic Volume. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

EF% calculation. Single Plane Method. Measurement of the end-systolic Volume. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

 

 

 

Stroce volume

Stroke volume is the volume of blood pumped by the heart during one contraction.

 

 

 

Fractional shortening

The Fractional shortening (FS%) is the percentage ratio of the systolic Diameter of the left ventricle to the diastolic Diameter.

 

 

LVEDD - Left ventricular end-diastolic diameter. LVESD - Left ventricular end-systolic diameter.

 

FS% calculation. Measurement of the end-systolic Diameter. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

FS% calculation. Measurement of the end-diastolic Diameter. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

 

 

 

Minute volume

Minute volume is the volume of blood pumped by the heart in one minute.

 

 

SV-Stroke volume. HR-Heart rate.

 

Heart index

The Heart index is the ratio of the minute volume of the heart to the surface area of the body.

 

 

CO-Minute volume. BSA - Body surface area.

 

Body surface area:

Body surface area can be calculated by Du Bois formula:

 

$   M - Body weight (kg). H - Body Height (cm).     How to Simulate the Left Ventricle Ejection fraction (EF%) calculation using the Single plane and Biplane method?   How to Simulate the Left Ventricle Fractional Shortening (FS%) calculation?   How to Simulate the Minute Volume (Cardiac Output) calculation?   How to Simulate the Cardiac index calculation? $