HYPERTROPHIC CARDIOMYOPATHY
There are elevated filling pressures if any of the following are true:
- Average E/e’ > 14
- Pulmonary venous AR duration minus mitral A-duration > 30 msec
- TR Peak Velocity > 2.8 m/s
- LA Volume Index > 34 mL/m²
If average E/e’ is unobtainable or not used routinely in your lab, use “septal E/e’ >15” or “lateral E/e’ >13” to determine elevated filling pressures.
RESTRICTIVE CARDIOMYOPATHY
There are elevated filling pressures if any of the following are true:
- Mitral inflow deceleration time < 140 msec
- Mitral E/A ratio > 2.5
- IVRT < 50 msec
- Average E/e’ >14
If mitral e’ > 8 cm/s then consider constrictive pericarditis. Also consider constrictive pericarditis if lateral e’ is less than septal e’.
ADDITIONAL NOTES:
Hepatic vein end-diastolic reversal velocity (measured on expiration) divided by forward flow velocity is definite constrictive pericarditis if > 0.8. Restrictive cardiomyopathy will have septal e’ < 6 cm/s.
If average E/e’ is unobtainable or not used routinely in your lab, use “septal E/e’ >15” or “lateral E/e’ >13” to determine elevated filling pressures.
