Already the Babylonians connected this Zodiac sign and the constellation with the mythological animal, sort of a mermaid goat. They called it the Goat-Fish. The reason for this is hidden in history.
Without an adequate blood supply, the heart muscle is deprived of oxygen and nutrients and waste products manufactured by the cells accumulates in the muscle tissue. Depending on the severity, it may cause myocardial ischemia, which is damage but not death of the muscle due to an inadequate blood supply. Alternatively it may cause death of the muscle tissue which is known as a myocardial infarction (MI).
Percentage saturation of hemoglobin is the percentage of oxygen bound to hemoglobin in blood. The most important factor is the partial pressure of oxygen (PO 2). Oxygen saturation is 98.5%, i.e., this percentage of oxygen is bound to hemoglobin in blood. Partial pressure of oxygen depends on two factors: When oxygen is moving from muscle to capillaries: PO 2 = 40 mm Hg due to poor oxygen content of blood. When oxygen is moving from capillaries to muscle: PO 2 = 100 mm Hg due to rich oxygen content of blood.