preferred embodiment of the invention here described is intended for dentists doctors nursing sisters and people of similar medical training nevertheless the means could be used by others in the capacity of assistants or even alone as the occasion demands at least insofar as the less skilled techniques are concerned e g mouth to mouth resuscitation fig5 illustrates the mask no 2 which is selected when angina pectoris and or myocardial infarction are diagnosed this chart has an aperture 46 to expose the glyceryl trinitrate tablets 13 and an aperture 47 to expose the second container of glyceryl trinitrate tablets 25 an aperture 48 to expose the sosegen 29 apertures 49 and 50 to expose the athropin and water 32 and 33 respectively and an aperture 51 to expose the butterfly needle 35 apertures 52 and 53 further expose the bottles 38 and 37 respectively for intravenous drip ii place an 0 6mg tablet of glycerol trinitrate under the patient 39 s tongue i stop all dental treatment and differentiate between an angina attack and myocardial infarction 1 angina rarely lasts longer than 10 minutes after effort is ceased or recommended drug is used 2 myocardial infarction produces a grey pallor nausea dyspnoea sweating and even cardiac arrest ii.