What will happen if the heart will not work properly?
The blood would not be able to get pumped round the body and the longer it goes on for the harder it takes to breath and after a while your heart will stop working and you cant breath because the heart has stopped working
What a pacemaker does is it helps a persons heart beat properly. I so happen to have a pacemaker. When someones heart is not beating when it is supposed to, the pacemaker sends a painless shock to the heart, and when that shock reaches the heart, the shock sort of wakes up the heart and it starts pumping.
A malfunction of the cardiovascular system is a heart attack because this will make the heart not work properly and also make the organs weaker and can even cause death. this is caused by not eating properly e.g burger/fatty foods and also lack of exercise if you think that you are having a heart attack then you must call 999 emeidently.