Out-of-hospital cardiac arrest: NHLBI studies tackle deadly public health problem

Sleep is a period of rest that alternates with wakefulness, and it affects many of your body’s systems. Not getting enough sleep raises your risk of many serious health problems.

Venous thromboembolism is a condition in which you have blood clots in your veins. The blood clots can block blood flow to your lungs (called a pulmonary embolism). A deep vein thrombosis (DVT) occurs when a blood clot form in a deep vein, usually in the leg.

A stroke happens when blood flow to the brain is blocked. This prevents the brain from getting oxygen and nutrients from the blood. 

Sleep studies, also called polysomnography, are tests that measure how well you sleep and how your body responds to sleep problems.

Blood transfusions and bone marrow transplants are two ways doctors can treat blood problems. Learn more about these procedures.

Idiopathic pulmonary fibrosis (IPF) is a serious long-term disease that happens when the tissue surrounding the air sacs, or alveoli, in the lungs becomes thick and stiff for unknown reasons.