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            NHLBI’s health topics provide information to help you learn more about heart, lung, blood, and sleep conditions, diagnostic tests, and treatments.
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    Clinical Trials
      

      Clinical Trials
  
  

  The NHLBI leads or sponsors studies for patients who have heart, lung, blood, or sleep-related diseases or disorders. Find studies for diseases and conditions and see if you or a loved one is eligible.
    Condition
      

      Conduction Disorders
  
  

  A conduction disorder, or heart block, is a problem with the electrical system that controls the heart’s rate and rhythm. This can cause the heartbeat to be too fast, too slow, or irregular.
    Condition
      

      Congenital Heart Defects
  
  

  Congenital heart defects, or diseases, are problems with the heart's structure that are present at birth.
    Condition
      

      COPD
  
  

  COPD, or chronic obstructive pulmonary disease, is a long-term condition that damages the lungs and blocks airflow into and out of the lunge. This makes it hard to breathe.
    Test
      

      Coronary Artery Bypass Grafting
  
  

  Coronary artery bypass grafting, sometimes called coronary artery bypass surgery or just bypass surgery, is a procedure to improve blood flow to the heart.
    Condition
      

      Coronary Heart Disease
  
  

  Coronary heart disease is a common type of heart disease where the arteries of the heart cannot deliver enough oxygen-rich blood to the heart.
    Test
      

      CPAP
  
  

  CPAP (continuous positive airway pressure) is a device that uses mild air pressure to keep the airways open while you sleep. It is often used to treat breathing problems during sleep.
    Condition
      

      Cystic Fibrosis
  
  

  Cystic fibrosis is an inherited condition that affects the body’s cells, tissues, and the glands that make mucus and sweat.
  
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                  Resources


Clinical Trials
      
            The NHLBI leads and supports many clinical trials to help find new ways to prevent, detect, and treat heart, lung, blood, and sleep disorders.
      
    
            Find NHLBI clinical trials that are currently enrolling participants.


Fact Sheets and Handouts
      
            The NHLBI develops materials for patients and health professionals on many heart, lung, blood, and sleep conditions. Information from the NHLBI is based on the latest scientific findings.
      
    
            Explore the NHLBI’s publications and resources. Back To Top Link
  

        

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