by Allison Meier on. Sharpest ever view of the Andromeda (courtesy NASA/ESA Hubble Space Telescope). The NASA/ESA Hubble Space Telescope has released the largest ever image of the Andromeda galaxy, opening up 100 million stars and star clusters to public exploration. Itâs also the sharpest view of Andromeda, the closest galaxy thatâs a spiral like our own Milky Way, ever taken.
Dizziness or light-headedness when standing up occurs as a result of abnormal blood pressure regulation. Normally, when people stand, gravity causes blood to pool in the veins of the legs and trunk. This pooling lowers the blood pressure and the amount of blood the heart pumps to the brain. Low blood flow to the brain causes the dizziness and other symptoms.
Doctors look for symptoms like Katie's plus there's one other obvious clue. Increased heart rate when you stand up from a resting position. You see, your heart pumps blood to the brain when it beats. If there's a sudden and dramatic increase in pulse rate, not enough blood gets to the brain and you get dizzy. So the increase in pulse and dizziness upon standing are key for diagnosis.