Chest pain

What is the difference between angiography, ct-angio and angioplasty? A relative had a chest pain and I heard about these things online.
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Angioplasty is an endovascular procedure to widen narrowed or obstructed arteries or veins, typically to treat arterial atherosclerosis. angiography is a medical imaging technique used to visualize the inside, or lumen of blood vessels. CT angio gives better picture .Here angiography and ct angio are used for diagnostic purpose ,angioplasty is a therapeutic intervention.
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