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.
Heart block refers to an abnormality in the way electricity passes through the normal electrical pathways of the heart. The abnormality blocks the electrical impulse from continuing through the normal pathways and usually results in a slower heart rate.he blocking of the impulse can come and go, resulting in dropped heartbeats.. A second-degree type II block may progress to complete or third-degree heart block. Second-degree heart block can be categorized into two types: 1  Mobitz type I block (also called Wenckebach) usually occurs in the AV node.