It opens up the "window" and lets in more information than in monitor mode. Diagnostic mode can filter out alot of information you may need for correct interpretation. This way is not going to show where the MI is, but can be useful for determination of an Inferior STEMI
According to what was learned in school was if the lead was placed more distally, you would get a better picture. But it also depends on the patient. If there is a neurological or physical defecit, you would place the leads closer to the abdomen. But it also depends on the Medic. The tracing...
I developed an allergy to latex after only 2 years. It started out as urticaria and now when I come into contact for a few minutes, it's all out anaphylaxis. I don't think there are any relations with food allergies though. Any foods are ok.