1 Angina Pectoris: It is described as a pain located at the back of the breast bone which may be sharp or dull. This sensation may radiate or crawl to the hand, arm, left shoulder, or jaw.  Vasculitis: When the small to medium sized arteries are inflamed, head tingling and numbness may result.
Most species of shark eat things like fish, crustaceans, mollusks, plankton, krill, marine mammals and other sharks. Sharks also have a very acute sense of smell that allows them to detect blood in the water from miles away.
That is how warships detect submarines, fishermen identify choice fishing spots, an obstetrician evaluates the fetus of a pregnant woman, and a cardiologist examines the heart of a patient. What is an Echocardiogram: An echocardiogram is a test in which ultrasound is used to examine the heart.