10 Emergency Cardiology Diagnoses Every ENP Should Recognize

Cardiovascular emergencies are among the highest-yield topics for both board preparation and real clinical practice, because rapid recognition directly changes outcomes. Here are ten diagnoses that deserve focused review:

1. ST-elevation myocardial infarction (STEMI) — an ECG diagnosis requiring immediate reperfusion, not a diagnosis to be confirmed by troponin first.
2. Unstable angina / NSTEMI — risk stratification and serial troponins guide management.
3. Aortic dissection — tearing pain, pulse or blood pressure differentials, and the importance of rate control before vasodilator therapy.
4. Cardiac tamponade — Beck's triad and the danger of reducing preload with diuretics or nitrates.
5. Unstable tachyarrhythmias — recognizing when synchronized cardioversion is indicated regardless of the specific rhythm.
6. Wide-complex tachycardia — treating as ventricular in origin until proven otherwise, particularly with structural heart disease.
7. Symptomatic bradycardia — the stepwise approach from atropine to pacing to chronotropic infusions.
8. Acute decompensated heart failure — distinguishing cardiogenic from other causes of dyspnea.
9. Hypertensive emergency — end-organ damage as the deciding factor for acute blood pressure management.
10. Cardiac arrest rhythms — shockable versus non-shockable rhythms and the corresponding ACLS pathways.

Board questions in this domain frequently test the next step, not just the diagnosis — so practice questions that force a management decision, not just pattern recognition.