🫀 Core Concepts Cardiac arrest = electrical failure (VF/pVT) or mechanical/perfusion failure (Asystole/PEA). On the floor/ICU, arrests are often preceded by resp failure or hypovolemia → RR <6 or >30, HR <40 or >140, SBP <90 → activate Rapid Response. ACS pathway: plaque → rupture → thrombus → ischemia/MI. STEMI = full occlusion, NSTE-ACS = partial; ischemia makes myocardium irritable → VF. ACLS boosts chances of ROSC + neuro recovery.

🧷 Chain of Survival (STEMI) Recognize → EMS/transport + prearrival notice → ED/cath dx → reperfusion. Goals: PCI ≤90 min from first medical contact; fibrinolysis ≤30  ...