Chris Pratt: 'I have great respect for the animals that I kill'. The Jurassic World star on why he hunts, growing up âdirt poorâ and making the shift from comic shlub to blockbuster hero. Alex Godfrey. Saturday 6 June 2015 07.00 EDT Last modified on Tuesday 20 September 2016 10.12 EDT.
First Degree Heart Block Overview. What is a first degree heart block? A person with first degree heart block has a delay in the electrical impulse that travels through the heart. An electrical impulse stimulates the muscle fibers in the heart to contract. The impulse spreads through the heart in a very organized manner, so that the atria contract first, followed by the ventricles.
First-degree heart block means that impulses are moving through the AV node too slowly. 1  Second-degree heart block means that impulses are traveling through the heart's atria but are delayed in the AV node. Because of this delay, the ventricles do not beat at the right moment.