Share. By Alison Doyle. According to the Bureau of Labor Statistics, the median wage for workers in the United States at the end of September 2014 was $790 per week or $41,080 per year for a 40 hour work week. Wages were 2.5% higher than at the same date for the previous year.
Normal. The two major sounds heard in the normal heart sound like âlub dubâ. The â lubâ is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,â dubâ or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
You of course know that the valves snapping shut make the two basic heart sounds often called lub-dub.. As you listen to a patient's chest, you want to hear a crisp lub followed by an equally crisp dub, with a brief moment of silence in between each lub-dub. The first heart sound, or lub, is S1.