doctor hagegard stressed what is called life's essential eight when it comes to heart health for not just men, but women as well. >> seeing that heart disease is the number one killer among all people in the u.s, often developing later in females, good diet, good exercise, quitting nicotine or cigaret. >> use good blood pressure, good cholesterol, blood sugar levels and weight. sleep is the final of those essential eight for your heart having good sleep. and so that's something that in the past couple of years, we've recognized more and more is that having a good 7 to 8 hours of uninterrupted sleep is really important for heart health. heart health. >> rather, doctor marin says that some of the facts about heart attacks are concerning about half of the people who die suddenly from a heart attack or a cardiac arrest never had a symptom before. so it's one of the reasons that he recommends a test for some to see if you have calcified plaques in the arteries to your heart and in my opinion, over the age of 40, get a coronary calcium scan to find out if you've got this disease brewing in