A 17-year-old male athlete collapses suddenly during a physical endurance activity. Bystanders report no preceding trauma, no known medical history or symptoms. The patient is currently pulseless and apneic. After resuscitation, the ECG shows high-voltage QRS complexes and deep septal Q waves. Which of the following is the most likely underlying clinical impression?

Determine which primary acid-base disruption is most likely for each circumstance below:

(2 of 13)En Route  You are dispatched at 17:40 for a 12-year-old male injured on a farm involving a motorized utility vehicle (UTV-like equipment). Caller reports the patient is “stuck underneath it and unable to get out.” Response time: 12 minutesEnvironment: Early evening, temperature 34°F (1°C), light wind (10–15 mph) → wind chill near freezingLighting: Dusk transitioning to dark; rural roads poorly litRoad conditions: Dry pavement, minimal trafficAccess: Paved county road leading to a gravel driveway, opening into a muddy trail/fieldResources:ALS ambulance (2 paramedics)BLS fire engine en route for manpower and extrication supportTransport options via ground:Community hospital: 12 minutesLevel I trauma center: 25 minutesWhat strategy is best when walking through the muddy trail/field?

(2 of 13)En RouteEMS is dispatched at 0815 to a home for a 3-year-old child with altered mental status. Call was made by the patient’s parent, who reports that the child had a high fever overnight and vomited several times. Outside temp is 32° F, skies are cloudy, roads are dry, and traffic is light. Ambulance is staffed with 2 paramedics; and a fire engine with EMTs is also responding.Which obstacle/barrier to effective communication should the paramedic most likely anticipate? 

What responses should a paramedic anticipate in a patient compensating from hypoperfusion/hypovolemic shock?

Which of these are man made drugs intended to kill people?Select 3

Why is it important to know if a chemical burn was caused by an acid or an alkali?

Which of these findings is evident of accessory muscle use, as seen with respiratory distress?

Click on 4 option boxes below

Which of these causes an increased HR and/or vasoconstriction?Select 2 options