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.
Asystole is an ACLS cardiac arrest rhythm where no electrical activity is present on an ECG. This condition is known as a flat line. An important step in ACLS Protocol is determining true presence of an Asystole condition, as light Ventricular Fibrillation can also appear to have very little electrical activity.systole is an ACLS cardiac arrest rhythm where no electrical activity is present on an ECG. This condition is known as a flat line. An important step in ACLS Protocol is determining true presence of an Asystole condition, as light Ventricular Fibrillation can also appear to have very little electrical activity.