NOD KEITH-FLACK NOD KEITH-FLACK / noeud de Keith et Flack / Keith and Flack node. NA: nodus sinuatrialis. [Sir Arthur Keith, anatomist enaCez, Londra, 1866-1955; Martin William Flack, fiz.ioiog eiig&s, Londra, 1882-1931.} Sin.: nod sinoatrial (v. i-nima). V. si pacemaker.