10 Key Lab Tests to Understand Your Risk of Sudden Heart Failure Cholesterol is called a silent killer. There's no way to detect it other than through blood tests. There are no direct symptoms of high cholesterol. A lipid panel is a key blood test to monitor cholesterol. However, half of the people with normal lipid results suffer a sudden cardiovascular event. You may have undiagnosed heart disease. Are you at risk for sudden heart failure? How do you find out? You order your lab tests here directly to evaluate the different types cholesterol and your heart health. Save 20% on the key tests for people with high cholesterol. Use Promo Code: CVDHC20 at check out. This promotion can not be combined with other promotions.