I’m a 53 year old woman and had triple bypass surgery 10 years ago. I’ve had another stint 2 years ago. My ef was at 40% now. What does this mean?

capacity of heart. You definetly high risk( likley genetic ) heart hisotry. EF 40 % is determined by echocardiogarm as " contractioj " capacity of left ventricule to " squeeze " or contract and push blood throughout the body . Normla is about 70 % . After heart attack the wall of musle is partialy replaced by scar tissue and contractility decrees. It can cause congestive heart failure. see cardilologist regullaary .