Related Clues:

• It originates from the left ventricle
• MacramŽ unit
• Tree feature
• Shoelace tangle
• Tie it and you're hitched
• Important vessel
• Small sandpiper
• Feature of pine paneling
• It's just above the heart
• Shoelace snarl
• ''Fantastic Voyage'' route
• Gordius' puzzler
• Rope feature
• Muscular problem
• Major vessel