What happens when you have a heart attack

If you have heart failure, your heart has difficulty pumping blood around your body. This can happen for many reasons - commonly because you have (or had) a medical condition which has damaged the Corney artery.
Heart failure has two main effects.
Firstly, not enough blood is getting to your body, which may cause fatigue, being extremely tired. Secondly, blood backs up waiting to enter your heart. This build up of blood causes fluid to leak out of your blood vessels and into the surrounding tissues. This leads to fluid build up (happens when there is too much blood circulating through the body the pressure rises (high blood pressure) it leaks out into the surrounding tissues and causes oedmea).
When your body try's to adapt to the changes it can cause more problems.