| Subject | English | Italian |
| med. | Flack node | nodo seno (nodus sinuatrialis) |
| med. | Flack node | nodo di Keith e Flack (nodus sinuatrialis) |
| med. | Flack node | nodo SA (nodus sinuatrialis) |
| med. | Flack node | nodo di Flack (nodus sinuatrialis) |
| med. | Flack node | nodo senoatriale (nodus sinuatrialis) |
| med. | Keith-Flack node | nodo seno (nodus sinuatrialis) |
| med. | Keith-Flack node | nodo di Flack (nodus sinuatrialis) |
| med. | Keith-Flack node | nodo SA (nodus sinuatrialis) |
| med. | Keith-Flack node | nodo di Keith e Flack (nodus sinuatrialis) |
| med. | Keith-Flack node | nodo senoatriale (nodus sinuatrialis) |
| med. | node of Keith and Flack | nodo senoatriale |
| med. | node of Keith and Flack | nodo sinoauricolare (di Keith e Flack) |
| med. | node of Keith and Flack | segnapasso |
| med. | node of Keith and Flack | nodo sinusale |
| med. | node of Keith and Flack | nodo di Keith-Flack |