Asthma Complexities (cont.)
Dennis Lee, MD
Dr. Lee was born in Shanghai, China, and received his college and medical training in the United States. He is fluent in English and three Chinese dialects. He graduated with chemistry departmental honors from Harvey Mudd College. He was appointed president of AOA society at UCLA School of Medicine. He underwent internal medicine residency and gastroenterology fellowship training at Cedars Sinai Medical Center.
George Schiffman, MD, FCCP
Dr. Schiffman received his B.S. degree with High Honors in biology from Hobart College in 1976. He then moved to Chicago where he studied biochemistry at the University of Illinois, Chicago Circle. He attended Rush Medical College where he received his M.D. degree in 1982 and was elected to the Alpha Omega Alpha Medical Honor Society. He completed his Internal Medicine internship and residency at the University of California, Irvine.
William C. Shiel Jr., MD, FACP, FACR
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
In this Article
- Asthma complexities facts
- Unusual symptoms of asthma
- Can a cough without wheezing be due to asthma?
- Nocturnal asthma
- Masqueraders of asthma
- Cardiac asthma
- Other bronchial conditions
- Vocal cord dysfunction (VCD)
- Other hypersensitivity reactions
- Exercise and sports
- Exercise induced asthma (EIA)
- What causes exercise induced asthma?
- What sports are best suited for exercise induced asthma? What sports are not?
- Ways to prevent and treat exercise induced asthma
- Conditions that may worsen asthma
- Gastroesophageal reflex disease
- The allergic rhinitis-asthma connection
- Sinusitis and asthma
- Air pollution
- Food allergy
- Find a local Asthma & Allergy Specialist in your town
Can a cough without wheezing be due to asthma?
Chronic coughing is frequently defined by doctors as a cough that lasts longer than three weeks. Chronic cough can have several causes such as postnasal drip, pneumonia, bronchitis, cigarette smoking, acid reflux, heart disease, lung cancer, and medications such as ACE inhibitors used for treating high blood pressure. Asthma also can cause chronic cough.
A chronic cough may be the only symptom of asthma. The cough may first appear after a cold or an upper respiratory tract infection. The cough may also start as a "tickle" in the throat. In some patients with asthma, laughing or exercise can bring on coughing. Other patients tend to cough at night while others cough at any time of day without provocation. It is very important that anyone with an undiagnosed chronic cough receive a chest radiograph to exclude more serious disease.
Coughing due to asthma may not respond to cough suppressants, antibiotics, or cough drops but only to medications for asthma. Therefore, accurately diagnosing asthma (by using pulmonary function tests) is important. Thus, a doctor, preferably a lung specialist or an allergist, should evaluate any cough that does not resolve on its own within three to six weeks.
More than 90% of patients with asthma experience nighttime wheezing and coughing. Symptoms of asthma are most common between midnight and 8 a.m. and are important causes of insomnia and sleep deprivation among patients with asthma. In fact, sleep disturbances in patients with asthma usually mean that there is inadequate control of the asthma and should prompt a visit to the doctor to re-evaluate the treatment being used for the asthma.
Function of the lungs in a patient with asthma can decline by up to 50% during an episode of nocturnal asthma. The reasons are not clear, but possible explanations include:
- exposure to allergens at night such as dust mites or animal dander;
- a decrease in cortisone and adrenaline levels that normally occurs at night, resulting in increased reactivity of the airways;
- reflux of stomach acid into the esophagus;
- cooling of the airways that cause spasm of the major airways;
- sinusitis and postnasal drip; and
- sleep apnea.
It is possible to test for nocturnal asthma by taking measurements of airflow out of the lungs during expiration in the evening and again upon awakening in the morning. This is done with a small portable meter that measures the flow of air. (An asthma specialist can demonstrate the correct technique for making these measurements.) A greater than 20% decrease in the peak flow measurement from the evening to the morning suggests nocturnal asthma.
Next: Masqueraders of asthma
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