Welcome to the NHLBI’s Health Topics Web site. The NHLBI developed this site for patients, caregivers, and the public.
Health Topics provides science-based, plain-language information related to heart, lung, and blood diseases and conditions and sleep disorders. The site contains articles on diseases, conditions, tests, procedures, and other relevant topics, which you can e-mail, print, and share.
New topics will be added regularly.
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Alpha-1 Antitrypsin Deficiency
Anemia (en Español)
Aneurysm Abdominal, Aortic, Cerebral, Peripheral
Angina Angina Pectoris, chest pain (en Español)
Antiphospholipid Antibody Syndrome Anticardiolipin Antibody Syndrome, Hughes Syndrome, Lupus Anticoagulant Syndrome
Aplastic Anemia
ARDS Acute Respiratory Distress Syndrome
Arrhythmia Wolff-Parkinson-White Syndrome
(en Español)
Cardiac Catheterization Cardiac Cath
Cardiac CT CAT Scan
Cardiac MRI Cardiac Nuclear Magnetic Resonance
Cardiac Rehabilitation Cardiac Rehab
Cardiogenic Shock
Cardiomyopathy
Cardioversion
Carotid Artery Disease
Carotid Endarterectomy Carotid Artery Surgery
Carotid Ultrasound
Catheter Ablation Cardiac Ablation
Chest CT Scan CAT Scan
Chest MRI
Chest X Ray
Childhood Interstitial Lung Disease
Clinical Trials
Congenital Heart Defects Congenital Heart Disease, Heart Defects
COPD Chronic Obstructive Pulmonary Disease, Chronic Bronchitis, Emphysema (en Español)
Coronary Angiography Angiogram
Coronary Angioplasty Balloon Angioplasty, Percutaneous Coronary Intervention (en Español)
Coronary Artery Bypass Grafting Bypass Surgery, Heart Bypass Surgery
Coronary Calcium Scan
Coronary Heart Disease Coronary Artery Disease (en Español)
Coronary Heart Disease Risk Factors
Coronary Microvascular Disease Cardiac Syndrome X, Nonobstructive Coronary Heart Disease
Cough
CPAP
Cystic Fibrosis
DASH Eating Plan
Deep Vein Thrombosis Thrombophlebitis, Venous Thromboembolism, Venous Thrombosis (en Español)
Diabetic Heart Disease
Excessive Blood Clotting Hypercoagulation, Thrombophilia
Heart Attack Myocardial Infarction (en Español)
Heart Block
Heart Disease in Women (en Español)
Heart Failure Congestive Heart Failure
Heart Murmur
Heart Palpitations
Heart Surgery
Heart Transplant
Heart Valve Disease
Hemochromatosis Iron Overload Disease
Hemolytic Anemia
Hemophilia (en Español)
High Blood Cholesterol
High Blood Pressure Hypertension (en Español)
Holes in the Heart Congenital Heart Defects, Atrial Septal Defect, Ventricular Septal Defect, ASD, VSD
Holter and Event Monitors Ambulatory EKG or ECC, Continuous EKG or ECG
How the Heart Works
How the Lungs Work
Hypersensitivity Pneumonitis
Hypotension Low Blood Pressure
Idiopathic Pulmonary Fibrosis Pulmonary Fibrosis
Immune Thrombocytopenia Immune Thrombocytopenic Purpura, Idiopathic Thrombocytopenic Purpura
Implantable Cardioverter Defibrillators
LAM Lymphangioleiomyomatosis
Long QT Syndrome
Lung Function Tests Lung Function Tests, Pulmonary Function Tests
Lung Transplant
Lung Ventilation/Perfusion Scan VQ Scan, Pulmonary VQ Scan
Lymphocytopenia Lymphopenia
Mitral Valve Prolapse Barlow’s Syndrome
Narcolepsy
Nuclear Heart Scan Nuclear Stress Test
Obesity Hypoventilation Syndrome Pickwickian Syndrome
Overweight and Obesity (en Español)
Pacemakers
Patent Ductus Arteriosus
Pericarditis
Peripheral Arterial Disease P.A.D.
Pernicious Anemia
Physical Activity and Your Heart (en Español)
Pleurisy and Other Pleural Disorders Hemothorax, Pleural Effusion, Pneumothorax
Raynaud's Raynauds Phenomenon
Respiratory Distress Syndrome
Respiratory Failure
Sarcoidosis (en Español)
Sickle Cell Anemia (en Español)
Sleep Apnea (en Español)
Sleep Deprivation and Deficiency
Sleep Studies
Smoking and Your Heart
Stents
Stress Testing
Stroke
Sudden Cardiac Arrest Cardiac Arrest, Sudden Cardiac Death