Symptoms of heart palpitations may include a passing sensation of a pounding, rapid, fluttering, or skipped heartbeat. These sensations are usually felt in the chest but may also be felt in the neck and/or the throat. Generally, there are 2 broad types of palpitations.
Flashes of light that appear as jagged lines or heat waves in both eyes, often lasting 10-20 minutes, are different. They are usually caused by migraine, a spasm of blood vessels in the brain.
But flashes and floaters may have more serious causes and consequences if the floaters are from blood, inflammatory or infectious processes within the eye, torn retinal tissue, or associated with a retinal detachment. Flashes may also occur with migraine headaches.