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.
Types of Heart Block. First-degree heart block â The electrical impulses are slowed as they pass through the conduction system, but they all successfully reach the ventricles. First-degree heart block rarely causes symptoms or problems. Well-trained athletes may have first-degree heart block. Some medications can also cause this condition.