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.
A-V block or heart block - First-degree A-V block does not cause any symptoms. Second-degree A-V block causes an irregular pulse or slow pulse. Third-degree A-V block can cause a very slow heartbeat, dizziness and fainting. VT - Non-sustained VT may not cause any symptoms or cause a mild fluttering in the chest. Sustained VT usually causes lightheadedness or loss of consciousness and can be lethal. Ventricular fibrillation - This causes absent pulse, unconsciousness and death.