Heart Attack vs Cardiac Arrest

1. The Core Problem: Plumbing vs Electrical

Heart Attack (Myocardial Infarction): A circulation problem caused by blocked coronary arteries:

• Blood clot or plaque blocks an artery
• Part of the heart muscle doesn't get oxygen-rich blood
• Heart tissue begins to die without oxygen
• Heart usually continues beating
• Think: "clogged pipe" preventing water flow

Cardiac Arrest: An electrical malfunction causing the heart to stop pumping:

• Heart's electrical system malfunctions
• Heart stops beating in a coordinated way (may quiver)
• Blood stops flowing to brain and organs
• Person collapses and loses consciousness
• Think: "power outage" shutting down the system

2. Symptoms: Warning Signs vs Sudden Collapse

Heart Attack symptoms (often gradual, can come and go):

• Chest pain or discomfort (pressure, squeezing, fullness)
• Pain radiating to arm, jaw, neck, or back
• Shortness of breath
• Cold sweats, nausea, lightheadedness
• Person remains conscious and can talk
• Symptoms may be subtle, especially in women

Cardiac Arrest symptoms (sudden and dramatic):

• Sudden collapse
• No pulse
• Not breathing or only gasping
• Loss of consciousness immediately
• No response to stimulation
• May have brief seizure-like activity

3. Relationship: Can Trigger Each Other

While different conditions, they can be connected:

• Heart attack can cause cardiac arrest: Damaged heart muscle from a heart attack can disrupt electrical signals, leading to cardiac arrest
• Cardiac arrest can happen during heart attack: About 50% of cardiac arrest cases are caused by heart attacks
• Other causes of cardiac arrest: Arrhythmias, electrical shock, drowning, drug overdose, severe blood loss, trauma
• Not all heart attacks cause cardiac arrest: Many people survive heart attacks without cardiac arrest

4. Immediate Response: Time Is Critical

For Heart Attack:

• Call 911 immediately
• Have person sit down and stay calm
• Give aspirin if available and not allergic (chew, don't swallow)
• Loosen tight clothing
• Do NOT drive to hospital yourself if you're the victim
• Time window: Hours matter, but minutes are crucial

For Cardiac Arrest:

• Call 911 immediately
• Begin CPR immediately (hands-only CPR if untrained)
• Use AED (automated external defibrillator) if available
• Continue until help arrives
• Every minute without CPR reduces survival by 10%
• Brain damage begins after 4-6 minutes without oxygen

5. Survival Rates and Outcomes

Heart Attack survival:

• Overall survival rate: ~90% if treatment is received promptly
• Golden hour: Treatment within 90 minutes significantly improves outcomes
• Many people survive with minimal heart damage if treated quickly
• Long-term prognosis depends on extent of damage and lifestyle changes

Cardiac Arrest survival:

• Out-of-hospital survival rate: Only 10-12% (US average)
• With immediate CPR: Doubles or triples survival chances
• With immediate CPR + defibrillation: Up to 60-70% survival possible
• Brain damage risk increases significantly after 6 minutes
• Most survivors occur when bystander CPR is provided quickly