It is your mom's birthday today. you and your dad are out doing some last minute shopping for the party you are throwing her tonight. the two of you decide to pick her up a bottle of perfume from the mall. the sales clerk is "swamped". she has no and several people waiting in line to purchase items. you can tell she is getting very frustrated as she is rushing around trying to all the customers. you notice that she is sweating and looks very flush. a couple of minutes later she turns extremely pale and falls to the floor unconscious. a customer rushes behind the counter to her. she says “she must be having a heart attack - does anyone know cpr". what steps should you take? (hint: you need to know what she needs, don’t just take the person yelling cpr as fact! )

A35-year-old woman comes to the ed complaining of chest pressure. she has had such episodes intermittently over the last 5 years, usually when sleeping, but over the last year she has had more frequent severe symptoms that are occasionally associated with severe migraine headaches. the pain is midsternal and is described as pressure that extends as a band around her chest. the ed physician is initially dubious that the pain is cardiac in origin, because the woman has no coronary disease risk factors. an ecg, however, shows 2mm st-segment elevation and inverted t waves in leads v1 through v5 and 1mm st-segment depression in leads ii, iii, and avf. before the cardiologist arrives in the ed, the patient's ecg has returned to normal. this repeat normal ecg is obtained after the administration of aspirin, nitroglycerin, morphine, and oxygen. which of the following is most likely for these findings? - diffuse intimal thickening with focal areas of atherosclerotic narrowing - intermittent thrombus formation and lysis in the left anterior descending artery - intermittent thrombus formation and lysis in the right coronary artery - plaque rupture and thrombus formation in the left anterior descending artery - transiently increased coronary vascular tone in the right coronary artery