HEART score (History, ECG, Age, Risk factors, Troponin)

Purpose: rapid ED risk-stratification for patients with chest pain to estimate short-term risk of major adverse cardiac events (MACE) and guide safe discharge vs observation/admission.

Components & scoring (each 0–2 points):

• History — subjective clinical gestalt about the chest-pain story:
  • 0 = nonsuspicious
  • 1 = moderately suspicious
  • 2 = highly suspicious for ACS.
• ECG — objective rhythm/ischemia:
  • 0 = normal
  • 1 = nonspecific repolarization changes
    • minor abnormalities in the ST segment and T wave that are not associated with a specific disease
  • 2 = significant ST-depression or ischemic changes.
• Age:
  • 0 = <45
  • 1 = 45–65
  • 2 = >65.
• Risk factors: (HTN, DM, hyperlipidemia, smoking, family history, obesity, known atherosclerotic disease)
  • 0 = none
  • 1 = 1–2 risk factors
  • 2 = ≥3 risk factors or known CAD.
• Troponin: assay-dependent — original HEART used conventional troponin:
  • 0 = normal
  • 1 = 1–3× normal limit
  • 2 = >3× normal limit.

Interpretation & common ED actions:

• 0–3 (low risk): very low short-term MACE risk; many EDs consider discharge with outpatient follow-up or repeat testing per pathway.
• 4–6 (moderate risk): observation, serial troponin(s), stress testing or cardiology consult.
• 7–10 (high risk): admit, urgent workup (coronary angiography as indicated) and aggressive management.
  Validation studies show low HEART scores have very low 6-week MACE rates (often quoted ≲2%), making the score useful to safely reduce unnecessary admissions.

Caveats:

• History is subjective; inter-rater variability can change the score.
• Troponin cutoffs and timing depend on the assay—don’t mix conventional troponin cutoffs with hs-cTn algorithms.
• The HEART score was designed for undifferentiated chest pain — it’s not a substitute for immediate activation of chest-pain pathways when ECG/troponin clearly indicate acute MI.

CHA₂DS₂-VASc (stroke risk in atrial fibrillation)

Purpose: estimate annual ischemic stroke risk in patients with atrial fibrillation (non-valvular) to guide decisions about long-term oral anticoagulation.

Components (points):

• Congestive heart failure / LV dysfunction — 1
• Hypertension = 1
• A₂ge ≥75 years = 2
• Diabetes mellitus = 1
• S₂Prior stroke / TIA / thromboembolism = 2
• Vascular disease (prior MI, PAD, aortic plaque) = 1
• Age 65–74 years = 1
• Sc Sex category: female = 1

Total: 0-9

Interpretation & guideline-based anticoagulation approach:

• Men with CHA₂DS₂-VASc = 0 (women = 1 because of sex alone): low risk — no anticoagulation usually indicated.
• Men with score ≥2 (women ≥3): anticoagulation is generally recommended.
• Men with score =1 (women =2): guidelines often recommend considering anticoagulation. Decision individualized by bleeding risk and patient preferences.

Caveats:

• It’s intended for non-valvular AF (patients with mechanical valves or moderate-severe mitral stenosis follow different recommendations).
• Female sex acts as a risk modifier (it increases stroke risk mainly in presence of other factors); treat female sex alone (CHA₂DS₂-VASc = 1 from sex only) as low risk. Emerging data continue to refine how sex modifies risk.

Wells score (for pulmonary embolism)

Purpose: estimate pretest probability of PE to decide whether to perform D-dimer testing or proceed straight to imaging (CTPA, V/Q).

Common (modified) point values:

• Clinical signs/symptoms of DVT — 3.0
• Alternative diagnosis less likely than PE — 3.0
• Heart rate >100 bpm — 1.5
• Immobilization ≥3 days or surgery in last 4 weeks — 1.5
• Previous DVT/PE — 1.5
• Hemoptysis — 1.0
• Cancer (treatment within 6 months or palliative) — 1.0
  (Total maximum ≈12.5).

Interpretation (two common approaches):

• Three-level system:
  • Low (<2)
  • Intermediate (2–6)
  • High (>6).
• Dichotomous approach (widely used in ED):
  • PE unlikely (≤4)
    • If PE unlikely → D-dimer (age-adjusted D-dimer often used);
      • if D-dimer negative → rule out PE;
  • PE likely (>4).
    • if PE likely → perform imaging (CTPA).

CURB-65 (pneumonia severity for community-acquired pneumonia)

Purpose: predict 30-day mortality in community-acquired pneumonia and help decide inpatient vs outpatient management. (Derived/validated in an international study).

Components (1 point each): CURB-65 =

• Confusion (new)
• Urea > 7 mmol/L (≈ BUN >19 mg/dL)
• Respiratory rate ≥ 30 /min
• Blood pressure (SBP <90 mmHg or DBP ≤60 mmHg)
• 65 = age ≥65 years

Interpretation / typical actions:

• 0–1: low risk — outpatient treatment usually safe.
• 2: consider short inpatient stay or supervised outpatient management.
• ≥3: severe — consider hospital admission and assess for ICU care (depending on other factors).

Glasgow Coma Scale (GCS)

Purpose: objective, reproducible measure of level of consciousness (trauma, stroke, overdose, critical care) — widely used to triage, document neurological status, and inform airway/ICU decisions.

Components & exact scoring (sum = 3–15):

• Eye opening (E) - 4 eyes
  • 4 = spontaneous
  • 3 = to verbal
  • 2 = to pain
  • 1 = none.
• Verbal response (V)
  • 5 = oriented
  • 4 = confused conversation
  • 3 = inappropriate words
  • 2 = incomprehensible sounds
  • 1 = none.
• Motor response (M)
  • 6 = obeys commands
  • 5 = localizes pain
  • 4 = withdraws from pain
  • 3 = abnormal flexion (decorticate)
  • 2 = extension (decerebrate)
  • 1 = none.

The lowest GCS score you can have is 3.

Interpretation (commonly used categories):

• 13–15: mild/no significant impairment
• 9–12: moderate impairment
• ≤8: severe — consider endotracheal intubation for airway protection and ICU care.

Practical issues & limitations:

• Intubation / sedated patients: verbal score is confounded; document as V-T or use a notation (some use 1T) and rely on E and M and clinical context.
• Children: GCS has modified pediatric versions — do not use adult GCS unmodified in young children.
• Intoxication / paralytics / heavy sedation: GCS underestimates neurological capacity — interpret in context.
• Use the trend in GCS (serial exams) more than a single value for deterioration/progress.