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Lesson

Cardiogenic Shock in the Field

10 min Cardiac & ECG Skip to quiz

Objective: Recognize a failing pump: low blood pressure plus congestion, or a large anterior heart attack. Do not treat it like trauma fluid. Choose a PCI hospital, not the closest bed.

Why this matters

The blood pressure is 78. The lungs have crackles. The neck veins are up. The 12-lead shows inferior ST elevation. Do not open two large IVs and give trauma-style fluid just because the patient is in shock. Cardiogenic shock is a failing pump. The left ventricle is already failing. Extra fluid can worsen pulmonary edema. Protocol owns any drug that raises the blood pressure.

Clinical sequence

  1. Get a 12-lead first. If this is ACS, go to a PCI-capable hospital and make a STEMI alert. ACS means a heart-attack workup. PCI means the cath lab. STEMI means an ST-elevation heart attack. Do not stop at a hospital that cannot open the artery.
  2. Sit them up if they can protect the airway and stay awake. Use CPAP only if they protect the airway and the blood pressure can tolerate it. CPAP means mask pressure that supports breathing. See the CPAP lesson.
  3. Do not give a large fluid bolus into wet lungs. Some protocols allow a small fluid challenge if the patient looks dry. That includes a dry right-ventricular infarct. It is not for crackles, and it is not trauma fluid.
  4. Use pressors and inotropes only if you are trained and authorized. A pressor raises blood pressure. An inotrope helps the heart contract. Push-dose epinephrine does not replace a PCI hospital.

Teaching points

  • Picture: low blood pressure plus congestion. That can be crackles, neck veins up, or edema. It can also be clear lungs with a failing pump after a large anterior heart attack.
  • Wet lungs: do not give a large fluid bolus into crackles.
  • Dry or right-ventricular infarct: the patient may look dry and hypotensive after inferior ST elevation. Careful fluids, if your protocol allows them, belong to that dry picture, not to wet lungs. Nitrates can drop the blood pressure. See the right and posterior MI lesson.
  • Mechanical causes: a hole between the ventricles, a torn mitral valve, or tamponade are hospital diagnoses. Still treat the shock and go.

Common errors

  • Running a large fluid bolus into crackles.
  • Giving nitro when the systolic BP is 70.
  • Going to the closest hospital with no PCI when the 12-lead meets STEMI-alert criteria.

Practice

One-minute check

Partner: anterior ST elevation, BP 72, wet lungs, and still alert. Say the fluid plan, the oxygen or CPAP plan, and the hospital.

Related: Shock categories, CHF, STEMI.

Sources & Further Study

Named guidelines for further study. They are not clinical orders and do not replace your protocol or medical direction.

Education only. Apply learning within your protocols and medical direction. This is not clinical care guidance.

Check Your Understanding

Questions drawn only from this lesson. After you check, the key is highlighted. Education practice — not a certification exam.

1. Hypotensive, wet lungs, and a big anterior ST-elevation pattern — what is the plan?
2. The reason not to dump a liter in this picture is:
3. Inferior ST elevation plus hypotension after nitro should make you:
4. Vasopressors for cardiogenic shock in the field are:
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