1 doctor agreed: Can be a problem: The pr interval refers to a measurement in an ekg of how long it takes the pacemaker in the top part of the heart (the atria) to reach the bottom parts (the ventricles). The normal pacemaker is the sinus node, and it should take a certain amount of time to travel from point a to b.
Define pariah dog: a feral or stray dog that typically lives near human settlements; especially : a usually medium-sized, primitive dog (as ofâ¦ a feral or stray dog that typically lives near human settlements; especially : a usually medium-sized, primitive dog (as of Africa, India, orâ¦ See the full definition since 1828
Patches of light that sometimes appear beside the sun are called sundogs. The scientific name is parhelion (plural: parhelia) from the Greek parÄlion, meaning beside the sun..Speculation is that they are called that because they follow the sun like a dog follows its master. Sundogs (or sun dogs) are also referred to as mock suns or phantom suns.he sundog's tail is formed by light passing through the crystal at angles other than the optimal deviation angle. Just because they are formed from ice crystals does not mean that sundogs can only be observed in cold climates.