How does heart disease lead to death?

What happens to your body when you have heart failure?

Heart failure occurs when the heart muscle doesn’t pump blood as well as it should. Blood often backs up and causes fluid to build up in the lungs (congest) and in the legs. The fluid buildup can cause shortness of breath and swelling of the legs and feet. Poor blood flow may cause the skin to appear blue (cyanotic).

How does heart disease affect the immune system?

Someone with an underlying heart issue also might have a less robust immune system. People’s immune systems weaken as they age, Vardeny said. And “in those with chronic medical conditions, the body’s immune response is not as strong a response when exposed to viruses.”

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