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Figure 1 Surgical field and electrophysiology catheter. (A) View of right external jugular cutdown and 1.7-F electrophysiology catheter in an anesthetized mouse. (B) Close-up of venous cutdown with proximal and distal sutures. The venotomy is made between these sutures, and the catheter is advanced to the atrioventricular junction and then sutured in place.
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