Chest pain approach: the first 10 minutes
A simple chest pain approach for any adult with acute chest pain: a three-rung ladder of stability, a 12-lead ECG within 10 minutes with the six life threats, then troponin and risk.
Chapters (11)
In an adult with acute chest pain, prioritise the first steps (stability, a 12-lead ECG within 10 minutes of arrival, then troponin and risk stratification for possible ACS) and name the life-threatening causes to consider first.
The short version
- Climb the ladder in order: stability first, then the 12-lead ECG and the life threats, then troponin and risk.
- In every patient with acute chest pain, an ECG should be acquired and reviewed for ST elevation within 10 minutes of arrival.
- A nondiagnostic first ECG rules nothing out: repeat it, especially if suspicion of ACS is high, the pain persists or the patient gets worse.
- The can't-miss six are acute coronary syndrome, aortic dissection, pulmonary embolism, tension pneumothorax, cardiac tamponade and esophageal rupture.
- Low-risk chest pain (under 1% risk of death or a major cardiac event at 30 days) can reasonably go home without admission or urgent cardiac testing.
The chest pain approach as a three-rung ladder
It is two in the morning. A 58-year-old man walks up to the triage desk with his hand pressed flat on his chest. The pain started 40 minutes ago as a heavy pressure, and he is sweating. The question this chest pain approach answers is simple: what do you do in the next 10 minutes?
Picture a ladder with three rungs, climbed in order. It mirrors the goals of the 2021 chest pain guideline: find the life threats, judge stability, and decide who needs the hospital.[1]
- Rung 1: is the patient stable?Airway, breathing, circulation, and a full set of vital signs, including oxygen saturation.
- Rung 2: 12-lead ECG and the life threatsGet a 12-lead ECG within 10 minutes of arrival, and think through the can't-miss six.
- Rung 3: troponin and riskIf it could be a coronary problem, measure troponin and estimate risk with a clinical decision pathway.
Most chest pain turns out to be benign.[1] The ladder exists so that you never miss the rare case that is not. It is a teaching order: in practice the steps overlap, and the focused exam happens while the ECG prints.
Rung 1: stability
Start with airway, breathing and circulation, and a full set of vital signs that includes oxygen saturation. Judging clinical stability is one of the three goals of the emergency evaluation, alongside finding the life threats and deciding who needs the hospital.[1]
Rung 2: a 12-lead ECG within 10 minutes
Rung two has a hard clock. In every patient with acute chest pain, an ECG should be acquired and reviewed for ST elevation within 10 minutes of arrival. This is a class 1 recommendation in the 2021 chest pain guideline, and the 2025 acute coronary syndrome guideline repeats the same 10-minute target.[1][2]
The target applies to every patient with acute chest pain, not only those who look coronary, and the clock starts at arrival.[1] The job of this first ECG is to find ST elevation.
Why so fast? Every delay to opening a blocked artery costs lives.[2]
If the first ECG is not diagnostic, that does not rule anything out. Repeat it (serial ECGs), especially if suspicion of ACS is high, the pain persists or the patient gets worse.[1][2]
The can't-miss six: life-threatening causes of chest pain
While the ECG prints, do a focused cardiovascular exam and run through the can't-miss six: the five life-threatening causes that both sources list, plus cardiac tamponade, which is just as urgent. Think of them before anything else.[1][3] Each comes with one or two bedside clues.
| Diagnosis | Clues |
|---|---|
| Acute coronary syndrome | Crushing pressure spreading to the arm or jaw, with sweating; the exam can be completely normal |
| Aortic dissection | Sudden, tearing pain that goes through to the back; sometimes a pulse or blood pressure difference between the arms |
| Pulmonary embolism | Pain worse on breathing in, with breathlessness and a fast heart rate |
| Tension pneumothorax | Low blood pressure, distended neck veins, quiet breath sounds and a hyperresonant chest on one side |
| Cardiac tamponade | Low blood pressure, distended neck veins, distant heart sounds and pulsus paradoxus |
| Esophageal rupture | Severe pain right after forceful vomiting or an endoscopy; sometimes air crackling under the skin |
Note how tension pneumothorax and tamponade share low blood pressure and distended neck veins. The chest findings separate them: quiet breath sounds and hyperresonance on one side for pneumothorax, distant heart sounds and pulsus paradoxus for tamponade.[3]
Rung 3: troponin and the clinical decision pathway
Rung three is for possible acute coronary syndrome without ST elevation. (ST elevation on the first ECG goes straight to reperfusion, the subject of a later lesson; it does not wait for troponin.) Measure troponin as soon as possible, then put the ECG, the troponin and the history into a clinical decision pathway.[1][2]
The pathway sorts patients into low, intermediate and high risk, and the stratum guides what happens next.[1]
| Risk | Next |
|---|---|
| Low | No urgent testing; discharge is reasonable |
| Intermediate | Further diagnostic testing may be indicated |
| High | Invasive coronary angiography |
So tests such as coronary CT angiography and stress testing come later, for selected patients after this risk stratification, not as first steps.[1]
Low risk means less than a 1% risk of death or a major cardiac event over 30 days.[1]
Practice question
Original · USMLE styleA 58-year-old man comes to the emergency department 40 minutes after the onset of substernal chest pressure. He describes the pressure as heavy and constant, and he has been sweating. He has hypertension treated with lisinopril. He is alert and speaks in full sentences. Temperature is 36.8°C (98.2°F), pulse is 96/min, respirations are 18/min, and blood pressure is 148/88 mm Hg. Oxygen saturation is 97% on room air. The lungs are clear to auscultation. Heart sounds are normal, with no murmurs.
Common questions
What is the first step in a patient with acute chest pain?
Check stability: airway, breathing, circulation and a full set of vital signs including oxygen saturation. In a stable patient, the time-critical next step is a 12-lead ECG within 10 minutes of arrival.
How quickly should an ECG be done for chest pain?
The ECG should be acquired and reviewed for ST elevation within 10 minutes of arrival. This is a class 1 recommendation in the 2021 chest pain guideline, and the 2025 ACS guideline repeats the same target.
What are the life-threatening causes of chest pain?
The can't-miss six: acute coronary syndrome, aortic dissection, pulmonary embolism, tension pneumothorax, cardiac tamponade and esophageal rupture.
What should you do if the first ECG is normal or nondiagnostic?
A nondiagnostic ECG does not rule anything out. Repeat it, especially if suspicion of ACS is high, the pain persists or the patient gets worse.
Does every patient with chest pain need a stress test?
No. Patients classed as low risk by a clinical decision pathway, with under 1% risk of death or a major cardiac event at 30 days, can reasonably go home without admission or urgent cardiac testing.
Transcript
Read the full narration, by chapter727 words
0:002 a.m. at triage
It's two in the morning, and a 58-year-old man walks up to the triage desk with his hand pressed flat on his chest. It started 40 minutes ago, a heavy pressure, and he's sweating. What do you do in the next 10 minutes? By the end of this lesson, you'll know the first steps for any adult with acute chest pain, and the six diagnoses to think about before anything else.
0:23The 3-rung ladder
Picture a ladder with three rungs, and you climb it in order. Rung one: is the patient stable? Rung two: get a 12-lead ECG, and think through the life threats. Rung three: if it could be a coronary problem without ST elevation, measure troponin and estimate risk. That mirrors the 2021 chest pain guideline: find the life threats, judge stability, and decide who needs the
0:49Rung 1: stability (most chest pain is benign)
hospital. Most chest pain turns out to be benign, but the ladder makes sure you never miss the rare one that isn't. Rung one is stability: airway, breathing, circulation, and a full set of vital signs, including oxygen saturation.
1:04Rung 2: ECG within 10 minutes
Rung two has a hard clock. In every patient with acute chest pain, an ECG should be acquired and reviewed for ST elevation within 10 minutes of arrival. That's a class one recommendation, and the 2025 acute coronary syndrome guideline repeats the same 10-minute target. Why so fast? Every delay to opening a blocked artery costs
1:29Repeat a nondiagnostic ECG
lives. And if the first ECG isn't diagnostic, that doesn't rule anything out, so you repeat it, especially if the pain persists or the patient gets worse.
1:40The can't-miss six
While the ECG prints, do a focused cardiovascular exam and run through the can't-miss six. One: acute coronary syndrome. Think crushing pressure spreading to the arm or jaw, with sweating, although the exam can be completely normal. Two: aortic dissection. Sudden, tearing pain that goes through to the back, sometimes with a pulse or blood pressure difference between the arms. But a pulse difference shows up in only about 30% of dissections, so its absence doesn't reassure you. Three: pulmonary embolism. Pain that's worse on breathing in, with breathlessness and a fast heart rate. Four: tension pneumothorax. Low blood pressure, distended neck veins, and quiet breath sounds with a hyperresonant chest on one side. Five: cardiac tamponade. Low blood pressure, distended neck veins, distant heart sounds, and pulsus paradoxus. Six: esophageal rupture. Severe pain right after forceful vomiting or an endoscopy, sometimes with air crackling under the skin.
2:52Rung 3: troponin and the clinical decision pathway
Rung three is for possible acute coronary syndrome without ST elevation. ST elevation goes straight to reperfusion; it doesn't wait for troponin. Measure troponin as soon as possible, then put the ECG, the troponin, and the history into a clinical decision pathway. The pathway sorts people into low, intermediate, and high risk. Low risk means less than a 1% risk of death or a major cardiac event over 30 days. And here's the misconception: not every chest pain needs a stress test or a catheter. Low-risk patients can reasonably go home without admission or urgent cardiac testing.
3:35Practice question
Your turn. Pause if you want to work it out. A 58-year-old man comes to the emergency department with 40 minutes of substernal chest pressure and sweating. His blood pressure is 148 over 88, his pulse is 96, and his oxygen saturation is 97% on room air. He's alert, speaking in full sentences, and his lungs are clear. What's the most appropriate next step in management?
4:04Answer and explanation
The answer is E: a 12-lead ECG, right now. He's stable, so rung two comes next, and the 10-minute clock is already running. A, a chest x-ray, is often part of the work-up, but it can't show ST elevation, so it doesn't come before the ECG. B, coronary CT angiography, and C, an exercise stress test, are later tests for selected patients after risk stratification, not first steps. D, supplemental oxygen, isn't indicated: in suspected acute coronary syndrome with a saturation above 90%, routine oxygen brings no benefit.
4:46Recap
Quick recap. One: climb the ladder in order: stability, then the ECG and the life threats, then troponin and risk. Two: get the ECG within 10 minutes of arrival, and repeat it if the first one isn't diagnostic. Three: low-risk chest pain, under 1% at 30 days, doesn't need urgent testing.
5:09Next: high-sensitivity troponin
Next: the ECG isn't diagnostic, so how do you rule a heart attack in or out? That's high-sensitivity troponin.
Sources
Numbers in the text, e.g. [1], point here- Gulati M, Levy PD, Mukherjee D, et al. 2021 AHA/ACC/ASE/CHEST/SAEM/SCCT/SCMR Guideline for the Evaluation and Diagnosis of Chest Pain. Circulation. 2021;144(22):e368–e454. ahajournals.org/doi/10.1161/CIR.0000000000001029
- Rao SV, O'Donoghue ML, Ruel M, et al. 2025 ACC/AHA/ACEP/NAEMSP/SCAI Guideline for the Management of Patients With Acute Coronary Syndromes. Circulation. 2025;151(13):e771–e862. ahajournals.org/doi/10.1161/CIR.0000000000001309
- Thompson AD, Shea MJ. Chest Pain. MSD Manual Professional Version (reviewed Aug 2024). msdmanuals.com/professional/cardiovascular-disorders/symptoms-of-cardiovascular-disorders/chest-pain
Guideline basis: US guidelines, the 2021 AHA/ACC chest pain guideline and the 2025 ACC/AHA ACS guideline, reviewed 22 Oct 2026. The 3-rung ladder is a teaching order; in practice the ECG and the assessment run in parallel.
The practice question is original and its patient is synthetic. Every fact is checked against the sources above in independent accuracy reviews. Always follow your local guidelines and your own laboratory’s ranges.
Image credits. Illustrations: Servier Medical Art (smart.servier.com), CC BY 4.0, adapted (recoloured, outlined, cropped): man, ECG machine, atherothrombosis, myocardial infarction, aorta, pulmonary embolism, pneumothorax, pericardium, esophagus, stethoscope. The red "tear (schematic)" marks are our own. ECG strips are schematic drawings made for teaching, not patient tracings. The risk pathway is our own diagram, redrawn after Gulati et al. 2021, Figure 8. All other drawings are original.
Corrections. None so far. Spotted an error? Email info@medservatory.com with the lesson code MS-CK-EMER-001.
For exam study only, not medical advice. Read the medical disclaimer.