Low Oxygen and Symptoms of Atrial Fibrillation. Atrial fibrillation can decrease the amount of blood your heart pumps with each beat by as much as 20 to 30 percent. As a result, other symptoms will occur when your body isn't getting enough oxygen and nutrients. These include:
The function of the speaker it to talk about the topic for which s/he was engaged, or to the common interest of the group. If you mean an electronic device, a speaker is to â¦ amplify sound. 2 people found this useful.
1 Global Speaker Force reports that most professional speakers charge $2,500 to $7,500 for a 90-minute presentation and breakout sessions, which are smaller, more focused discussions held at a conference. 2  Celebrities and accomplished authors often charge $50,000 or more to speak at an event.