Heart health isn't all about heart disease! Focus on the health of your heart early and throughout your life to avoid heart disease. Be heart healthy by eating right and exercising. Sometimes, even if you are focusing on your heart, heart disease can occur because it is caused by a combination of diet and hereditary factors. Heart disease describes multiple issues, which are commonly diagnosed when damage is caused to your heart or blood vessels. Heart diseases are cardiovascular issues, arrhythmias and heart defects.