The idea of finding and raising the Titanic was thought of very soon after the sinking of the vessel. However, the first successful attempt at locating the Titanic Wreck was in 1985 by a French and American expedition led by Jean-Louis Michel and Dr. Robert Ballard.
The higher the pressure, the harder the heart has to pump. Normal adult blood pressure is defined as a blood pressure of 120 mm Hg1 when the heart beats (systolic) and a blood pressure of 80 mm Hg when the heart relaxes (diastolic).
As defined by the American Heart Association, the top number, or systolic blood pressure is normally less than 120 (mm Hg, millimeters of mercury), and the bottom number, the diastolic blood pressure is normally less than 80 (mm Hg). In other words, 118/78 is considered normal, but 120/80 is not. Prehypertension is defined as a systolic pressure of 120-139 or a diastolic pressure of 80-89. A systolic of 140 or greater, or a diastolic blood pressure of 90 or greater is defined as hypertension, or high blood pressure. A hypertensive crisis is a diastolic pressure of greater than 110 or a systolic pressure of greater than 180; this requires emergency attention.