ðə suːpˈiəɹɪɚ bˈoːɹdɚɹ ʌvðə tˈɜːmɪnəl sˈʌlkəs dˈɛzɪɡnˌeɪts ðə tɹænsvˈɜːs plˈeɪn ɪnwˌɪtʃ ðɪ ˌɛsˈeɪ nˈoʊd ɹᵻsˈaɪdz.
The superior border of the terminal sulcus designates the transverse plane in which the SA node resides.