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
We know contagious yawning is linked to empathy, so it may mean dogs can empathise well with humans, but we need to do more tests to be sure, he said. While it is possible the dogs were simply copying the yawning movement, Senju said it was unlikely because dogs usually need to be trained to copy human actions.