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In relation to pacemakers and induction cooktop, the National Center for Biotechnology Information, U.S. National Library of Medicine has the following paper:
Do induction cooktops interfere with cardiac pacemakers? - PubMed
Choice has also looked into this in the past and found. (and in relation to the above paper)…
Associate Professor Neil Strathmore, Cardiologist has a special interest in pacemakers and particularly in issues relating to electrical or magnetic interference. He told us there are no published accounts of an induction cooktop interfering with a pacemaker or similar device. A 2006 study looked at a “worst-case” of a left-sided “unipolar” pacemaker set at the most sensitive setting and concluded that interference theoretically might occur if the person was closer than 60cm to the cooktop. However, nearly all pacemakers in Australia are “bipolar” and not set to such a sensitive setting. Therefore it’s extremely unlikely that any interference would occur in routine use and to any extent that would cause an adverse effect.