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Asthma

What is asthma?

Asthma is a chronic (long-term) lung disease. It affects your airways, the tubes that carry air in and out of your lungs. When you have asthma, your airways can become inflamed and narrowed. This can cause wheezing, coughing, and tightness in your chest. When these symptoms get worse than usual, it is called an asthma attack or flare-up.

What causes asthma?

The exact cause of asthma is unknown. Genetics and your environment likely play a role in who gets asthma.

An asthma attack can happen when you are exposed to an asthma trigger. An asthma trigger is something that can set off or worsen your asthma symptoms. Different triggers can cause different types of asthma:

  • Allergic asthma is caused by allergens. Allergens are substances that cause an allergic reaction. They can include
    • Dust mites
    • Mold
    • Pets
    • Pollen from grass, trees, and weeds
    • Waste from pests such as cockroaches and mice
  • Nonallergic asthma is caused by triggers that are not allergens, such as
    • Breathing in cold air
    • Certain medicines
    • Household chemicals
    • Infections such as colds and the flu
    • Outdoor air pollution
    • Tobacco smoke
  • Occupational asthma is caused by breathing in chemicals or industrial dusts at work
  • Exercise-induced asthma happens during physical exercise, especially when the air is dry

Asthma triggers may be different for each person and can change over time.

Who is at risk for asthma?

Asthma affects people of all ages, but it often starts during childhood. Certain factors can raise your risk of having asthma:

  • Being exposed to secondhand smoke when your mother is pregnant with you or when you are a small child
  • Being exposed to certain substances at work, such as chemical irritants or industrial dusts
  • Genetics and family history. You are more likely to have asthma if one of your parents has it, especially if it's your mother.
  • Race or ethnicity. Black and African Americans and Puerto Ricans are at higher risk of asthma than people of other races or ethnicities.
  • Having other diseases or conditions such as obesity and allergies
  • Often having viral respiratory infections as a young child
  • Sex. In children, asthma is more common in boys. In teens and adults, it is more common in women.
What are the symptoms of asthma?

The symptoms of asthma include:

  • Chest tightness
  • Coughing, especially at night or early morning
  • Shortness of breath
  • Wheezing, which causes a whistling sound when you breathe out

These symptoms can range from mild to severe. You may have them every day or only once in a while.

When you are having an asthma attack, your symptoms get much worse. The attacks may come on gradually or suddenly. Sometimes they can be life-threatening. They are more common in people who have severe asthma. If you are having asthma attacks, you may need a change in your treatment.

How is asthma diagnosed?

Your health care provider may use many tools to diagnose asthma:

  • Physical exam
  • Medical history
  • Lung function tests, including spirometry, to test how well your lungs work
  • Tests to measure how your airways react to specific exposures. During this test, you inhale different concentrations of allergens or medicines that may tighten the muscles in your airways. Spirometry is done before and after the test.
  • Peak expiratory flow (PEF) tests to measure how fast you can blow air out using maximum effort
  • Fractional exhaled nitric oxide (FeNO) tests to measure levels of nitric oxide in your breath when you breathe out. High levels of nitric oxide may mean that your lungs are inflamed.
  • Allergy skin or blood tests, if you have a history of allergies. These tests check which allergens cause a reaction from your immune system.
What are the treatments for asthma?

If you have asthma, you will work with your health care provider to create a treatment plan. The plan will include ways to manage your asthma symptoms and prevent asthma attacks. It will include:

  • Strategies to avoid triggers. For example, if tobacco smoke is a trigger for you, you should not smoke or allow other people to smoke in your home or car.
  • Short-term relief medicines, also called quick-relief medicines. They help prevent symptoms or relieve symptoms during an asthma attack. They include an inhaler to carry with you all the time. It may also include other types of medicines which work quickly to help open your airways.
  • Control medicines. You take them every day to help prevent symptoms. They work by reducing airway inflammation and preventing narrowing of the airways.

If you have a severe attack and the short-term relief medicines do not work, you will need emergency care.

Your provider may adjust your treatment until asthma symptoms are controlled.

Sometimes asthma is severe and cannot be controlled with other treatments. If you are an adult with uncontrolled asthma, in some cases your provider might suggest bronchial thermoplasty. This is a procedure that uses heat to shrink the smooth muscle in the lungs. Shrinking the muscle reduces your airway's ability to tighten and allows you to breathe more easily. The procedure has some risks, so it's important to discuss them with your provider.

Cough

Coughing is a reflex that keeps your throat and airways clear. Although it can be annoying, coughing helps your body heal or protect itself. Coughs can be either acute or chronic. Acute coughs begin suddenly and usually last no more than 2 to 3 weeks. Acute coughs are the kind you most often get with a cold, flu, or acute bronchitis. Chronic coughs last longer than 2 to 3 weeks. Causes of chronic cough include:

  • Chronic bronchitis
  • Asthma
  • Allergies
  • COPD (chronic obstructive pulmonary disease)
  • GERD (gastroesophageal reflux disease)
  • Smoking
  • Throat disorders, such as croup in young children
  • Some medicines

Water can help ease your cough - whether you drink it or add it to the air with a steamy shower or vaporizer. If you have a cold or the flu, antihistamines may work better than non-prescription cough medicines. Children under four should not have cough medicine. For children over four, use caution and read labels carefully.

Heart Failure

What is heart failure?

Heart failure means that your heart can't pump enough oxygen-rich blood to meet your body's needs. Heart failure doesn't mean that your heart has stopped or is about to stop beating. But without enough blood flow, your organs may not work well, which can cause serious problems.

Heart failure can affect one or both sides of your heart:

  • With right-sided heart failure, your heart is too weak to pump enough blood to your lungs to get oxygen.
  • With left-sided heart failure, your heart can't pump enough oxygen-rich blood out to your body. This happens when the left side of your heart becomes either:
    • Too weak to pump enough blood.
    • Too thick or stiff to relax and fill with enough blood.

Left-sided heart failure is more common than right-sided heart failure.

What causes heart failure?

Heart failure can start suddenly after a medical condition or injury damages your heart muscle. But in most cases, heart failure develops slowly from long-term medical conditions.

Conditions that can cause heart failure include:

  • Arrhythmia (a problem with the rate or rhythm of your heartbeat)
  • Cardiomyopathy
  • Congenital heart defects or other types of heart diseases that you are born with
  • Coronary artery disease
  • Endocarditis
  • Heart attack
  • Heart valve diseases
  • High blood pressure
  • A blood clot in your lung
  • Diabetes
  • Certain severe lung diseases, such as COPD (chronic obstructive pulmonary disease)
  • Obesity

Over time, left-sided heart failure can lead to right-sided heart failure.

Who is more likely to develop heart failure?

Heart failure can happen at any age. It happens to both men and women, but men often develop it at a younger age than women. Your chance of developing heart failure increases if:

  • You're 65 years old or older. Aging can weaken and stiffen your heart muscle.
  • Your family health history includes relatives who have or have had heart failure.
  • You have changes in your genes that affect your heart tissue.
  • You have habits that can harm your heart, including:
    • Smoking.
    • Eating foods high in fat, cholesterol, and sodium (salt).
    • Having an inactive lifestyle.
    • Alcohol use disorder (AUD).
    • Illegal drug use.
  • You have other medical conditions that can affect your heart, including:
    • Any heart or blood vessel conditions, including high blood pressure.
    • Serious lung diseases.
    • Infection, such as HIV/AIDS or COVID-19.
    • Obesity.
    • Diabetes.
    • Sleep apnea.
    • Chronic kidney disease.
    • Anemia.
    • Iron overload disease.
    • Cancer treatments that can harm your heart, such as radiation and chemotherapy.
  • You are African American. African Americans are more likely to develop heart failure and have more serious cases at younger ages than people of other races. Factors such as stigma, discrimination, income, education, and geographic region can also affect their risk of heart failure.
What are the symptoms of heart failure?

The symptoms of heart failure depend on which side of your heart is affected and how serious your condition has become. Most symptoms are caused by reduced blood flow to your organs and fluid buildup in your body.

Fluid buildup happens because the flow of blood through your heart is too slow. As a result, blood backs up in the vessels that return the blood to your heart. Fluid may leak from the blood vessels and collect in the tissues of your body, causing swelling (edema) and other problems.

Symptoms of heart failure may include:

  • Feeling short of breath (like you can't get enough air) when you do things like climbing stairs. This may be one of the first symptoms you notice.
  • Fatigue or weakness even after rest.
  • Coughing.
  • Swelling and weight gain from fluid in your ankles, lower legs, or abdomen (belly).
  • Difficulty sleeping when lying flat.
  • Nausea and loss of appetite.
  • Swelling in the veins of your neck.
  • Needing to urinate (pee) often.

At first you may have no symptoms or mild symptoms. As the disease gets worse, your symptoms will usually bother you more.

What other problems does heart failure cause?

Fluid buildup and reduced blood flow to your organs can lead to serious problems, including:

  • Breathing problems from fluid in and around your lungs (also called congestive heart failure)
  • Kidney or liver damage including cirrhosis
  • Malnutrition if fluid buildup makes eating uncomfortable or if your stomach doesn't get enough blood flow to digest food properly
  • Other heart conditions, such as irregular heartbeat and sudden cardiac arrest
  • Pulmonary hypertension
How is heart failure diagnosed?

To find out if you have heart failure, your doctor will:

  • Ask about your medical history, including your symptoms
  • Ask about your family health history, including relatives who have had heart failure
  • Do a physical exam
  • Will likely order heart tests and blood tests, including a brain natriuretic peptide (BNP) test

In some cases, your doctor may refer you to a cardiologist (a doctor who specializes in heart diseases) for tests, diagnosis, and care.

What are the treatments for heart failure?

Your treatment will depend on the type of heart failure you have and how serious it is. There's no cure for heart failure. But treatment can help you live longer with fewer symptoms.

Even with treatment, heart failure usually gets worse over time, so you'll likely need treatment for the rest of your life.

Most treatment plans include:

  • Taking medicine
  • Eating less sodium and drinking less liquid to control fluid buildup
  • Making other changes, such as quitting smoking, managing stress, and getting as much physical activity as your health care provider recommends
  • Treating any conditions that may make heart failure worse

You may need heart surgery if:

  • You have a congenital heart defect or damage to your heart that can be fixed.
  • The left side of your heart is getting weaker and putting a device in your chest could help. Devices include:
    • An implantable cardioverter defibrillator.
    • A biventricular pacemaker (cardiac resynchronization therapy).
    • A mechanical heart pump (a ventricular assist device (VAD) or a total artificial heart).
  • Your heart doctor recommends a heart transplant because your heart failure is life-threatening and nothing else is helping.

As part of your treatment, you'll need to pay close attention to your symptoms, because heart failure can worsen suddenly. Your provider may suggest a cardiac rehabilitation program to help you learn how to manage your condition.

Can heart failure be prevented?

You may be able to prevent or delay heart failure if you:

  • Work with your provider to manage any health conditions that increase your risk of developing heart failure
  • Make healthy changes in your eating, exercise, and other daily habits to help prevent heart disease

NIH: National Heart, Lung, and Blood Institute

Lung Diseases

When you breathe, your lungs take in oxygen from the air and deliver it to the bloodstream. The cells in your body need oxygen to work and grow. During a normal day, you breathe nearly 25,000 times. People with lung disease have difficulty breathing. Millions of people in the U.S. have lung disease. If all types of lung disease are lumped together, it is the number three killer in the United States.

The term lung disease refers to many disorders affecting the lungs, such as asthma, COPD, infections like influenza, pneumonia and tuberculosis, lung cancer, and many other breathing problems. Some lung diseases can lead to respiratory failure.

Dept. of Health and Human Services Office on Women's Health

Lung Transplantation

A lung transplant removes a person's diseased lung and replaces it with a healthy one. The healthy lung comes from a donor who has died. Some people get one lung during a transplant. Other people get two.

Lung transplants are used for people who are likely to die from lung disease within 1 to 2 years. Their conditions are so severe that other treatments, such as medicines or breathing devices, no longer work. Lung transplants most often are used to treat people who have severe:

  • COPD
  • Cystic fibrosis
  • Idiopathic pulmonary fibrosis
  • Alpha-1 antitrypsin deficiency
  • Pulmonary hypertension

Complications of lung transplantation include rejection of the transplanted lung and infection.

NIH: National Heart, Lung, and Blood Institute

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