What is a heart attack?

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We call cardiologists heart doctors. Usually, that is a misnomer. Technically the ┬áheart is a muscle that synchronously contracts to send blood oxygenated by the lungs to the rest of the body then receive deoxygenated blood to repeat the process. An electrical system orchestrates the contractions and four valves ensure blood flows in only one direction. If the muscle, … [Read more...]