Image: The cardiac conduction system. The SA node is the natural pacemaker of the heart. You may have heard of permanent pacemakers (PPMs) and temporary pacing wires (TPWs) which are used when the SA node has ceased to function properly.
Grace [grace] as a girls' name is pronounced grayce. It is of Latin origin, and the meaning of Grace is favor, blessing. From grtia. A virtue name introduced by the Puritans, referring to God's grace. It has the same meaning as Anna and Hannah and may be used as a variation of these. In Ireland it is used as an anglicization of Grainne.
Meanings: Grace Doe Ewe Wise Protection Variation of Raymond Female Sheep Star in the Sky Moon Goddess of the Moon Light Heaven Shine Beautiful Army Greek origin, feminine form of Theodosius (meaning: God's Gift). Theodosia was ranked 950 in 2016 US female names list and elevated by 0.31% from its previous ranking of 953 in 2006.