Clinical Calculators

Bedside tools for risk stratification

HEART Score for Major Cardiac Events

Predicts 6-week risk of MACE in chest pain patients

History

Highly suspicious (2 pts) Moderately suspicious (1 pt) Slightly suspicious (0 pts)

ECG

Significant ST depression (2 pts) Nonspecific repolarization disturbance (1 pt) Normal (0 pts)

Age

≥ 65 years (2 pts) 45-64 years (1 pt) < 45 years (0 pts)

Risk Factors

HTN, Hypercholesterolemia, DM, Obesity (BMI>30), Smoking, +Family History, Atherosclerotic Disease

≥ 3 risk factors or history of atherosclerotic disease (2 pts) 1-2 risk factors (1 pt) No known risk factors (0 pts)

Troponin

≥ 3x normal limit (2 pts) 1-3x normal limit (1 pt) ≤ normal limit (0 pts)

Total Score

Low Risk (0-3)

Discharge likely safe

Wells' Criteria for PE

Pre-test probability of Pulmonary Embolism

Clinical signs & symptoms of DVT Leg swelling, pain with palpation

+3.0

PE is #1 diagnosis OR equally likely

+3.0

Heart Rate > 100 bpm

+1.5

Immobilization check ≥ 3 days OR Surgery in last 4 weeks

+1.5

Previous PE or DVT

+1.5

Hemoptysis

+1.0

Malignancy w/ treatment w/in 6 mo or palliative

+1.0

Total Score

Low Risk

Consider D-dimer rule out

CHA₂DS₂-VASc Score

Stroke risk in Atrial Fibrillation

Age Group

< 65 65-74 (+1) ≥ 75 (+2)

Sex

Male Female (+1)

Congestive Heart Failure

Hypertension

Stroke / TIA / Thromboembolism

Vascular Disease (MI, PAD, Plaque)

Diabetes Mellitus

Score & Risk

~0% Stroke Risk/Year

No Anticoagulation Needed

Educational risk scores only (HEART, Wells, CHA₂DS₂-VASc). Not a substitute for clinical judgment or local protocols. Thresholds follow commonly taught cut-offs — confirm with latest literature.