MYOCARDIOGRAPH
\mˈa͡ɪəkˌɑːdɪˌə͡ʊɡɹaf], \mˈaɪəkˌɑːdɪˌəʊɡɹaf], \m_ˈaɪ_ə_k_ˌɑː_d_ɪ__ˌəʊ_ɡ_ɹ_a_f]\
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An instrument for recording graphically the work done by the heart-muscle.
By Alexander Duane