Heart disease, known as a silent killer, claims the lives of millions of Americans each year. An umbrella term for multiple conditions that affect the heart and blood vessels, heart disease includes coronary artery disease, pulmonary heart disease, and hypertension. Fortunately, most types of heart disease are preventable and can be managed or even treated through a combination of diet, exercise, medication, and monitoring. Here, a look at heart health by the numbers.

  • 105 million: Number of Americans with total cholesterol levels of 200 mg/dL or level at which cardiovascular risk begins to rise, according to the American Heart Association.

  • 90: Percentage of people who will develop high blood pressure at some point in their lives, according to the Centers for Disease Control and Prevention (CDC).

  • 39: Percentage of people with high blood pressure who are unaware of their condition, according to the American Heart Association.

  • 930,000: Number of Americans who die from cardiovascular diseases each year, which accounts to one death every 33 seconds, according to the CDC.

  • 47: Percentage of cardiac deaths that occur each year before medical intervention, according to the CDC.

  • $258 billion: The cost of heart disease, including medical care, lost productivity, and health-care services in 2006, according to the CDC.

  • 2,300: Maximum milligrams of salt that individuals should consume daily to minimize the risk of developing heart disease.

  • 5 to 6: Number of healthy mini-meals that should be consumed daily to help control blood sugar and regulate cholesterol levels.

  • 60: Minimum amount of daily physical activity, in minutes, that the American Heart Association recommends for children and adolescents.

  • $2.7 billion: Amount of money the American Heart Association has invested since 1949 to support heart health research.