What are Clinical Trials & How to Participate
Clinical trials are medical studies that involve people like you. They help find new ways to prevent, detect, or treat diseases that are safe and effective.
Where can I find information from the NHLBI about specific heart, lung, blood, and sleep disorders or related topics?
Information about specific heart, lung, blood, and sleep disorders can be found on our Health Topics pages. The A to Z index can help you find plain language information about diseases, conditions, tests, procedures, and other relevant topics, which you can also print and share.
How can I be sure of the quality of information provided by NHLBI?
NHLBI adheres to National Institutes of Health (NIH) standards for information quality. Learn about Plain Language Writing at the NIH.
How can I download or order NHLBI publications and materials?
Publications may be downloaded in PDF format or ordered from the NHLBI’s Center for Health Information through our Publications and Resources Online Catalog. You can also:
- Order by phone: Call the NHLBI CHI at 1-877-NHLBI4U (1-877-645-2448) between 8:30 a.m. and 5 p.m. ET, Monday through Friday (closed Federal holidays).
- Order by mail: NHLBI Center for Health Information, P.O. Box 30105, Bethesda, MD 20824-0105
- Order by email: Center for Health Information, firstname.lastname@example.org
Can the NHLBI give me advice about a specific medical condition, provide me with a second medical opinion, or recommend medical specialists or hospitals in my area?
The NHLBI does not give medical advice, render second opinions, provide referrals to doctors, or counsel individuals on specific medical problems. Advice on treatment or care of an individual patient should be obtained through consultation with a physician or other health professional who has examined the patient and is familiar with the patient's medical history.