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Shockwave lithotripsy balloon placement. A: Distal balloon marker tip (arrow) at the clavicular head. The darker, shaded area where the balloon is inflated denotes the approximate area being treated with shockwave lithotripsy. The balloon is then deflated and drawn toward the superior vena cava for the second (B) and third (C) sites of shockwave intravascular lithotripsy delivery.
