Your heart is made up of four chambers â two upper chambers (atria) and two lower chambers (ventricles). The rhythm of your heart is normally controlled by the sinoatrial node (SA node) â or sinus node â an area of specialized cells located in the right atrium. This natural pacemaker produces the electrical impulses that trigger the normal heartbeat. From the sinus node, electrical impulses travel across the atria to the ventricles, causing them to contract and pump blood out to your lungs and body. Premature ventricular contractions are abnormal contractions that begin in the ventricles. These extra contractions usually beat sooner than the next expected regular heartbeat. And they often interrupt the normal order of pumping, which is atria first, then ventricles.
The events that took place at the Abigail compound in the Mid-Season Finale tore the families apart. Now, as Fear The Walking Dead embarks on the second half of Season 2, our heroes must forge their own paths to survive. Click here for your first hint at whatâs to come when the series returns August 21.
Fear the Walking Dead is an American horror drama television series created by Robert Kirkman and Dave Erickson that premiered on AMC on August 23, 2015. It is a companion series and prequel to The Walking Dead, which is based on the comic book series of the same name by Robert Kirkman, Tony Moore, and Charlie Adlard.