Ejection Fraction Reduced Heart Failure

• ejection fraction reduced heart failure is associated with:

  • post acute myocardial infarction - loss of myocardial contractile mass
  • myocardial remodelling post acute myocardial infarction
  • filling is not a problems, so end diastolic ventricular volume is preserved
  • contraction is limited, so theres a relatively compromised stroke volume
  • so stroke volume (ejection) is a relatively low % EDVV (filling) - ejection fraction is reduced
  • due to poor force production (despite reasonable filling) cardiac output is low
• ejection fraction reduced heart failure:

  • ejection fraction is reduced
  • cardiac output is inadequate
  • this means there is a problem with emptying - systolic failure
  • e.g. a low SV of 40 instead of a normal 70, and a normal EDVV of 120
  • 40/120 = 33%, which is lower than what EF should be (70%)