Left Ventricle Ejection Fraction (LVEF)
When to scan:
Where to put the probe:
• Use Parasternal Long Axis (PLAX) as primary view
• Visualize PLAX as having 3 columns
• Break view generation into 3 steps:
1. Window shopping:
• Indicator to right shoulder
• Move probe in arc to find best window
2. Fan for the middle (valves)
• Tilt/fan probe until valves are maximally opened
3. Rotate for the sides (LV)
• Keep angle from Step 2
• Rotate to maximally elongate the left ventricle
- Use Parasternal Long Axis (PLAX) as primary view
- Visualize PLAX as having 3 columns
- Break view generation into 3 steps:
1. Window shopping:
• Indicator to right shoulder
• Move probe in arc to find best window
2. Fan for the middle (valves)
• Tilt/fan probe until valves are maximally opened
3. Rotate for the sides (LV)
• Keep angle from Step 2
• Rotate to maximally elongate the left ventricle
Findings
Normal LVEF:
• Anterior leaflet of mitral valve comes within 8mm of septum
• Left ventricle cavity diameter changes by at least 1/3
Diminished LVEF:
• Anterior leaflet of mitral valve >1cm from septum
• Left ventricle cavity diameter changes less than 1/3
Hyperdynamic LVEF:
• Anterior leaflet of mitral valve hits septum
• Left ventricle cavity diameter changes by ½ or greater