Some recent media noise was made about napping and the risk of stroke. Is it possible that an innocent nap here and there can increase your risk of stroke?
Not really. Logically, it only makes sense to associate napping and stroke if the napping is being done as a result of poor sleeping at night. This is what might increase the stroke risk, and not necessarily the napping itself.

Why is this? As it turns out, sleep is key to good heart-health and lack of it may independently increase a person's stroke risk. The total increase in risk for those who dose off during the day as a result of poor sleeping at night is still small (about twice that of normal), so please, don't lose any more sleep over this! A few common reasons why people lose sleep include snoring or chocking at night, periods of poor breathing during sleep, and depression, among other causes.

Recommended reading:
Drugs, alcohol and stroke
Who is at risk of stroke?
What is a TIA anyway?
Six ways to remain stroke free