Cardiac Failure is reduced CO despite normal venous return. I think numbers help to explain it.
NORMAL Physiology ππ
LV holds 100 mls blood end diastole fully loaded
EF 70% so stroke volume = 70 mls ejected
HR 70 so CO = HR x SV = 4900 mls/min
NORMAL Physiology ππ
LV holds 100 mls blood end diastole fully loaded
EF 70% so stroke volume = 70 mls ejected
HR 70 so CO = HR x SV = 4900 mls/min
Systolic HF (HF reduced EF) π€π€
LV holds 100 mls blood end diastole fully loaded
EF 35% so stroke volume = 35 mls ejected
HR 70 so CO = HR x SV = 2450 mls/min
LV holds 100 mls blood end diastole fully loaded
EF 35% so stroke volume = 35 mls ejected
HR 70 so CO = HR x SV = 2450 mls/min
Diastolic HF (HF preserved EF) π€π€
LV holds 50 mls blood end diastole fully loaded
EF 70% so stroke volume = 35 mls ejected
HR 70 so CO = HR x SV = 2450 mls/min
LV holds 50 mls blood end diastole fully loaded
EF 70% so stroke volume = 35 mls ejected
HR 70 so CO = HR x SV = 2450 mls/min
Diastolic HF analogy is trying to inflate stiff party balloon. You can only half fill it. Systolic HF is like a well used flabby balloon with no elasticity. One can have a hybrid of systolic and diastolic HF .
Hope that helps. My cardiology days are long ago so please be gentle.
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