Annual deaths from tornadoes, earthquakes and floods together total fewer than 200. The most deadly heat wave in recent years occurred in Chicago over a week in July 1995, when temperatures hovered around 100 degrees.
Cardiac Cycle: 1st Systole Phase. During the systole phase, the right ventricle receives impulses from the Purkinje fibers and contracts. The atrioventricular valves close and the semilunar valves open. The de-oxygenated blood is pumped into the pulmonary artery.
Sometimes your systolic and diastolic numbers may put you in 2 different categories. For example, your systolic number could be 145 (Stage 1 high blood pressure). Your diastolic number, however, could be 100 (Stage 2 high blood pressure).