Calculating Stroke Volume and Cardiac Output Using Echo with Clarius PA Scanner

Introduction

• Presenter: Shelly
• Topic: How to calculate stroke volume and cardiac output using echocardiography with the Clarius PA Scanner
• Preset Used: Cardiac preset

Steps to Calculate Stroke Volume and Cardiac Output

Step 1: Measure Left Ventricular Outflow Tract (LVOT) Diameter

• Window: Parasternal window
• Action: Freeze the image with the valve open
• Measurement: Measure LVOT diameter close to the aortic valve opening
• Capture: Take a picture of the measurement

Step 2: Obtain Apical 5 Chamber View

• Window: Apical window
• View Needed: Apical 5 chamber view (includes the aortic valve and LVOT)
• Action: Bring up pulse Doppler and place sample volume in LVOT
• Doppler Spectrum: Start the Doppler and scroll to get a clean Doppler spectrum

Step 3: Perform Calculations

• Heart Rate Measurement: Measure peak to peak to get the heart rate
• Stroke Volume Measurement: Trace the LVOT flow to get stroke volume (141 cc's in this example)
• Cardiac Output: Access the report page to display cardiac output

Summary

• The process involves using the Clarius PA Scanner to capture specific cardiac views and measurements.
• Steps include measuring LVOT diameter, obtaining a clean Doppler spectrum, and tracing the LVOT flow to calculate stroke volume and cardiac output.
• Results are displayed in the report page for quick estimations.