Dr. John M Clark MD

Recommended Articles

• Allergic Bronchitis

  What is allergic bronchitis?Bronchitis is an inflammation of the inner lining of the bronchial tubes usually due to a viral infection of the upper respiratory tract. Bronchitis itself can be acute when the signs and symptoms last no longer than 10 days, and chronic when the signs and symptoms tend...

• Atelectasis vs Pneumothorax: What’s the Difference?

  What Is Atelectasis?Atelectasis is a complete or partial collapse of the lung or lobe of a lung. This medical condition develops when the tiny sacs, known as alveoli, present within the lung become deflated.This is a breathing complication which often occurs after surgery. Apart from surgery, it is...

• When Could Orthopnea Mean Something More Serious?

  IntroductionOrthopnea is the medical term used when referring to the occurrence of dyspnea (shortness of breath) when you are lying flat. This symptom is often a sign of heart failure. However, orthopnea can also be due to other health conditions. Dyspnea (shortness of breath) is not the same with...

• What Is Nicotine?

  IntroductionNicotine is an alkaloid stimulant that comes from the nightshade family of plants, particularly from the leaves of tobacco. The type of nicotine found in tobacco plants is called Nicotiana tabacum. Nicotine can also be synthetically produced. Thousands of chemicals are contained in...

• 47-year-old with Cystic Fibrosis Refuses to Let It Stop Her

  Sue Britton, a 47-year-old woman has cystic fibrosis. In her 20s, she became tired of being known and labeled as the ‘sick girl’, so she left her home to embark on a 7-month journey around the world. The fact that she had cystic fibrosis and needed medication on a daily basis did not stop her....

• Pneumonia: The Signs and Symptoms

  You may be a patient concerned about the symptoms of pneumonia or you may have a friend or relative with symptoms suggestive of pneumonia. There are no universal symptoms that apply to every individual. The symptoms will vary from person to person and depend on the specific situation of each and...