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Myocardial biopsy process of the Liwen procedure. Under the guidance of echocardiography, the biopsy needle was inserted into the puncture sheath from the apex to the central septum and took biopsies. (a) LMB illustration. (b) Echocardiographic image during LMB. (c) The process of LMB. (d) The biopsy needle with specimen.
