By Andrew Zimmerman Jones. Definition: Dark matter is a hypothesized form of matter particle that does not reflect or emit electromagnetic radiation. The existence of dark matter is inferred from gravitational effects on visible matter, such as stars and galaxies.
An enlarged heart is medically known as cardiomegaly. Cardiomegaly can be caused by a number of different conditions, including diseases of the heart muscle or heart valves, high blood pressure, arrhythmias, and pulmonary hypertension.t is important to remember that an enlarged heart is not a disease itself but a physical sign that can accompany many diseases and conditions. Not all of the associated conditions listed below, however, will always result in cardiomegaly. Treatment and prognosis are dependent upon the underlying cause.
High Blood Pressure. One of the most common reasons of enlarged heart is uncontrolled high blood pressure. High blood pressure makes the heart more stressed causing it to push itself harder to supply the blood to the entire body, which can often lead to the thickening and stiffening of the heart muscles.