High-pressure area to describe the weather systems generated by highs and lows were introduced in the mid-1800s, mostly by the British. The scientific theories which explain the general phenomena originated about two centuries earlier. The term cyclone was coined by Henry Piddington of the British East India Company to describe the devastating storm of December 1789 in Coringa, India. A cyclone forms around a low-pressure area. Anticyclone, the term for the kind of weather around a high-pressure area, was coined in 1877 by Francis Galton to indicate an area whose winds revolved in the opposite direction of a cyclone. In British English,
Pressure overload Pressure overload Pressure overload refers to the pathological state of cardiac muscle in which it has to contract while experiencing an excessive afterload. Pressure overload may affect any of the four chambers of the heart, though the term is most commonly applied to one of the two ventricles. Chronic pressure overload leads to concentric hypertrophy of the cardiac muscle, which can in turn lead to heart failure, myocardial ischaemia or, in extreme cases, outflow obstruction. Any obstruction to the outflow of one of the chambers of the heart can lead to pressure overload. A forceful apex beat indicates left ventricular