Heart attacks usually are a result of depression, because people who have suffer from depression always think negatively, therefore people who don't have such negative energies will not suffer from depression and as a result won't be at risk of developing heart attacks and hypertension that cause severe strokes. The blood does not circulate well through the body, and might not reach the brain as well as it should. People who experience negative incidents in their lives fill this negativity with wrong habits, such as smoking and eating too much or too little. They might also suffer from high blood pressure as they will constantly be nervous and worried.
To live healthfully, think and act healthfully. Be happy, if ill cancer patients can still be optimistic and have positive attitudes towards life then you also can! If a problem haunts you, fix it and don't let it take control over your life and ruin it.
‘The greatest discovery of my generation is that human beings can alter their lives by altering their attitudes of mind.’ William James