What does 30% heart function mean? the dr's told my friend his grandpa has that & surgery options not an option. he had heart attack & stents placed?

Heart disease: The ef is the ejection fraction or the percent of the volume of blood in the heart that is pumped with each beat. It is a measure of the ability of the heart to contract. It is normally 55 to 65 per cent. Abnormal hearts can have much lower ejection fractions.

Your friend have : Ischemic cardiomiopathy. The left ventricle is weak due to the heart attack. 30% ejection fraction it's a measurement of the left ventricular effectiveness in pumping blood. Normal is more than 55%. If surgery not an option your friend need to change his lifestyle and follow100% the cardiologist medical regimen. Cardiac rehabilitation very important. Good luck.