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.
The 1st Number: Systolic pressure is the blood pressure when the heart muscle contracts. The 2nd Number: Diastolic pressure is the blood pressure when the heart is relaxed. The BP numbers shown in the chart represent Typical systolic-diastolic pairs. There are many non-typical systolic/diastolic pairs, which I have analyzed statistically at Systolic-Diastolic Pairs.