Some nebulae create their own light, which sometimes has a fluorescent appearance, while others only reflect the light from nearby stars. Nebulae are often seen around dying stars, and it's thought they may be a natural process that occurs when a star is nearing the end of its life. Nebulae resemble thin clouds that have less atoms per cubic inch than a cloud of smoke.
Cardiomyopathy is a group of diseases that affect the heart muscle. Early on there may be few or no symptoms. Some people may have shortness of breath, feel tired, or have swelling of the legs due to heart failure. An irregular heart beat may occur as well as fainting.
What are Heart Muscle Diseases? The heart predominantly comprises billions of heart muscle cells or âcardiomyocitesâ. Heart muscle diseases are those disorders that directly affect heart muscle cells and cause inadequate pumping of the heart, known as heart failure. The early signs of heart failure are shortness of breath during mild exertion and, as the illness worsens, breathlessness even while simply sitting or lying down.