NASA has released an image taken by the Hubble space telescope of a cluster of stars known as NGC-121, in one of our neighboring galaxies. ESA/Hubble/NASA. Saturn's largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this true-color scene from NASA's Cassini spacecraft.
An enlarged left ventricle of the heart can be the result of heart muscle disease caused by medication, drugs, alcohol, idiopathic (cause unknown).
What causes heart block? Heart block can be caused by: Scarring (fibrosis) of the heart's electrical system caused by aging. This is the most common cause of heart block. Heart attacks. Infection of the heart valves (endocarditis). Complication of Lyme disease. Sarcoidosis or hemochromatosis.