Chest Pain — the Heart Up Close
Crushing chest pain starts a heart-muscle clock: get the 12-lead ECG within 10 minutes of arrival, run the first-minutes set in parallel, and treat oxygen as a drug with an indication — not a routine. First, meet the organ on the clock.
Each dot names a part of the heart and says, in one line, what it does. Turn the heart around — the dots on the far side hide until they face you.
Follow the blood
Oxygen-poor blood comes back from the body, crosses to the lungs to pick up oxygen, returns, and is pumped out to the whole body. Tap the steps in order.
What it is
ACS — acute coronary syndrome — means heart muscle is in danger because a coronary artery is blocked or critically narrowed. The longer the muscle waits without blood flow, the more of it is lost: "time is muscle." One test carries the clock — the 12-lead ECG, acquired and reviewed for STEMI within 10 minutes of arrival.
Around the ECG, the first-minutes set runs in parallel, not one finished step at a time: cardiac monitoring, IV access, aspirin as ordered unless contraindicated, and a focused assessment alongside. A long, complete history never stands in front of the ECG.
The rule: ECG in 10, set in parallel, oxygen by indication
- ECG within 10 minutes of arrival. Not after the chest X-ray, the antacid trial, or the full history — anything routine placed before it is spending muscle.
- Run the set in parallel. Monitor on, IV access in, aspirin as ordered unless contraindicated, focused assessment alongside — nobody waits for one step to finish before the next begins.
- Oxygen is a drug with an indication. Give it for confirmed hypoxia — saturation below 90%. At 90% and above, routine oxygen is not recommended: in a patient saturating 97% on room air, withhold the routine mask.