Number of Black Senators. March 2, 2010, charm, 1 Comment. How many black senators are there in the U.S.? 1. The present 111 th U.S. Congress has a lone Senator in the person of Rep. Roland Burris of Illinois. This is based on a statistical profile released by the Congressional Research Service in February 2010. To date, there have only been 6 black senators in the U.S. Senate. The first was in Senator Hiram Rhodes Revels of Mississippi who was voted in 1870.
What is a low blood pressure reading? A low blood pressure reading is having a level that is 90/60mmHg, or lower. Only one of the numbers has to be lower than it should be to count as low blood pressure. In other words: if the top number is 90 or less (regardless of the botton number) this may be low blood pressure.
Someone with a systolic pressure of 120 and a diastolic pressure of 80 has a blood pressure of 120/80, or 120 over 80.. Normal blood pressure is lower than 120/80. Low blood pressure does not have a specific number where it is too low. Most doctors consider blood pressure to be too low when it causes symptoms or drops suddenly. In general, low blood pressure symptoms happen when blood pressure is less than 90/60.