Toothache can be the precursor of myocardial infarction, although untreated myocardial infarction may cause sudden death, but it can not be said that toothache is the precursor of sudden death, more for oral diseases caused by toothache.
In myocardial infarction, the typical precursor is angina pectoris, which lasts more than 15 minutes and cannot be relieved by rest or nitroglycerin. When sudden cardiac death precedes the onset of infarction, it can stimulate the brachial plexus nerve and cause toothache. This situation is usually after the activity, can appear obvious toothache, after a few minutes can be completely relieved, at this time should be considered myocardial ischemia caused by toothache.
In addition, if the toothache occurs after brushing, chewing, red and swollen gums, etc., it is generally considered that oral diseases, such as periodontitis, wisdom teeth pericoronitis and other diseases caused by the teeth themselves or the pain of the gums, is not a precursor to sudden death.
In short, the manifestation of toothache, should promptly go to the regular hospital, clear cause, under the guidance of the doctor for treatment.