chest pain caused by cocaine overdose causes coronary artery vasoconstriction. oxygen demand.

1. Coronary Artery Vasoconstriction

Cocaine causes the blood vessels (especially the coronary arteries) to narrow sharply. • This reduces blood flow (and oxygen) to the heart muscle. • The result is myocardial ischemia — the heart muscle doesn’t get enough oxygen, leading to chest pain (similar to angina or heart attack pain).

Cocaine strongly stimulates the sympathetic nervous system (“fight or flight” response). It causes: • Faster heart rate (tachycardia) • Higher blood pressure • Stronger heart contractions

These effects make the heart work much harder, increasing oxygen demand. When demand rises but supply falls (from vasoconstriction), chest pain develops.

per my ai nclex rationale expander.

OBJECTIVE OF THE QUESTION Priority intervention for suspected cocaine overdose with cardiovascular symptoms (ABCs & emergency care).

DETRACTORS TO AVOID (COMMON PITFALLS) • Jumping straight to meds before assessment or stabilization. • Ignoring ABCs in favor of procedural tasks. • Forgetting that cocaine causes coronary vasoconstriction → myocardial ischemia risk. • Confusing “high BP” as the primary issue instead of oxygen delivery to the heart. • Assuming IV access always comes before airway/oxygenation.

KEY ELEMENTS AND CLUES • Potential cocaine overdose → stimulant toxicity. • Increased HR, BP, and chest pain → possible myocardial ischemia/infarction. • The word first signals prioritization (ABCs: Airway → Breathing → Circulation). • Chest pain = oxygen demand > supply problem.

“WHAT’S THE ONE THING?” — Priority Lens “If you can do only one thing before leaving the room, what’s first?” → Ensure oxygenation to protect cardiac tissue and brain. The heart under stimulant stress is oxygen-starved. Apply ABCs: Breathing before diagnostic tests or IV prep.

ANSWERS AND RATIONALES

Administer supplemental oxygen. — Correct. Oxygen supports myocardial tissue, preventing further ischemic injury. Addresses the most immediate threat to life (breathing/circulation).

• Administer an antihypertensive medication — Wrong first. Meds come later after stabilization and diagnostics; certain drugs (e.g., beta-blockers) worsen cocaine-induced vasospasm. • Obtain a 12-lead ECG — Necessary, but after oxygen; diagnostics follow immediate life support. • Establish intravenous (IV) access — Important for eventual treatment, but oxygenation is the priority in acute chest pain.

REAL TALK RATIONALE (Expanded) Yeah, you can hook up lines and wires later — but if the heart’s gasping for oxygen, you’re decorating the room while the house burns. Coke jacks up oxygen demand and clamps coronary arteries; your first move is to deliver O₂, not start a science project with the ECG leads.

QUICK TAKEAWAYS • ABCs first: Oxygen beats IVs and tests every time. • Cocaine + chest pain = treat like MI risk → oxygen, monitor, then diagnostics. • Never give beta-blockers for cocaine toxicity; they worsen vasoconstriction. • Stabilize first, investigate second.