What is the Threat of Radon? Radon is the second leading cause of lung cancer after smoking. In the United States, the EPA estimates that about 21,000 lung cancer deaths each year are radon related and in Canada that number stands at approximately 3,000.
The definition of intermittent is something that starts and stops or happens irregularly. An example of intermittent is occasional thunder during a rainstorm. stopping and starting at intervals; pausing from time to time; periodic. Origin of intermittent.
Intermittent claudication is an early symptom of peripheral artery disease (PAD) caused by atherosclerosis (narrowing and hardening of the arteries). It's characterized by pain, cramping, and tiredness felt in the legs during exercise although it can sometimes occur in the arms, too.