In a moment that blurred the line between lesson and life, a CPR training session at a college in Wisconsin, US, turned into a real-life emergency. Instructor Karl Arps, who was teaching students at the Fox Valley Technical College, how to respond to a heart attack, suddenly became the patient, forcing his class to put their training into action.

Midway through the demonstration, 72-year-old Arps began showing alarming symptoms - his hand began to curl, his face contorted, and he lost consciousness. At first, some students wondered if it was part of the lesson. But within seconds, they realized it was real.

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Among the students was Logan Lehrer, a firefighter trainee who was preparing to become an emergency medical technician. Logan quickly recognized something was wrong with Arps, and within moments, the entire classroom transformed into a coordinated emergency response team.

While one student called emergency services, the others immediately began performing CPR – an act they had learned from Arps. They took turns administering chest compressions and used a defibrillator - just as they had been trained. “There was no panic. Everyone knew what to do,” Lehrer later toldCBC Canada.

Their swift response made all the difference.

CPR works by maintaining blood flow to the brain and vital organs until the heart can be restarted

Arps had suffered a heart attack that led to cardiac arrest - a life-threatening condition where the heart stops pumping effectively. While often confused, these two conditions are different:

According to theInternational Red Cross Society, survival rates for cardiac arrest outside hospitals are low - less than 10 per cent. However, immediate CPR and use of a defibrillator can triple survival chances. CPR works by maintaining blood flow to the brain and vital organs until the heart can be restarted. This is why public awareness and training are critical.

In this case, the students’ ability to act quickly turned them into lifesavers.

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