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Calcium-channel blockers, also known as calcium antagonists, seem to work by preventing or slowing the flow of calcium into muscle cells. Calcium activates contraction of muscle, so if it is blocked, cardiac and arterial muscle will not contract as much. This is an obvious benefit for the patient, as a strong contraction in the coronary [...]

Here’s another case where a drug has been scientifically demonstrated to decrease the likelihood of a subsequent heart attack following an initial event. Nine out of ten studies have shown that beta-blocking drugs, which interfere with nervous stimulation of cells in the heart called beta-adrenergic receptors, increase heart attack patients’ chances of survival. The beta-blockers [...]