This condition can weaken bones, create kidney stones, and affect how well the heart and brain work. Treatment depends on the cause.
Disease
Thrombocytopenia (low platelet count)
Problems with how blood clots can lead to excessive bleeding or blood clotting. Learn about the risks and treatments for a low blood platelet count.
Disease
Mild cognitive impairment (MCI)
Learn more about this stage between the typical memory loss related to aging and the more serious decline of dementia.
Disease
Lymphoma
Find out more about the symptoms, diagnosis and treatment of this cancer of the lymphatic system.
Disease
Leukemia
Learn about this cancer that forms in the blood and bone marrow.
Disease
Abdominal aortic aneurysm
An aneurysm in the lower part of the aorta can grow slowly and silently. Know the symptoms of this dangerous condition and the treatment.
Disease
Broken heart syndrome
Learn more about this temporary heart muscle condition that can mimic a heart attack. It may be triggered by stressful events, such as a loved one's death.
Disease
Bradycardia
Find out more about the symptoms, diagnosis and treatment of a slower than typical heartbeat.
Disease
Mitral valve stenosis
When the valve between the left heart chambers is narrowed, the heart doesn't get enough blood. Know the symptoms, causes and treatment of this type of heart valve disease.
Disease
Brugada syndrome
Learn about the symptoms, causes and treatments for this heart rhythm condition that is sometimes inherited.
Disease
Bundle branch block
A delay or blockage in the heart's signaling pathways can interrupt the heartbeat and make it harder for the heart to pump blood.
Disease
Myocardial ischemia
Myocardial ischemia reduces blood flow to the heart and may cause chest pain — but not always. Learn all the signs and symptoms and how to treat it.