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.
During race weekends, a radio commentary service entitled Radio Thruxton operates on the Medium Wave band on 1602 kHz. This has commentators at the key points of the track, namely, the aforementioned Chicane and Complex as well as a pit reporter, who conducts interviews with the race winners.