It's not a surprise to find yourself short of breath after a workout. But are you out of air when you're at rest, or even lying down? If so, it might be a sign of a larger problem. You need to get it checked out by your doctor right away.
Shortness of breath is a symptom of a lot of medical conditions. Watch out for other issues that may go along with your airflow problem.
The quivering upsets the normal rhythm between the atria and the lower parts of the heart, the ventricles. And the ventricles may beat fast and without a regular rhythm.
This is dangerous because if the heartbeat isn't strong and steady, blood can collect, or pool, in the atria. And pooled blood is more likely to form clots. Clots can travel to the brain, block blood flow, and cause a stroke.