Comprehensive Exercise Stress Test: Components, Protocol, and Interpretation

A complete exercise stress test (exercise tolerance test, treadmill test) evaluates cardiovascular response to controlled physical stress, detecting ischemia, arrhythmias, and functional capacity.

Standard Components

1. Resting baseline: 12‑lead ECG, blood pressure, heart rate, symptoms.
2. Exercise protocol: Most common—Bruce protocol (treadmill, 3‑min stages increasing speed/grade). Alternatives: modified Bruce, Naughton, cycle ergometer for limited mobility.
3. Continuous monitoring: 12‑lead ECG (ST‑segment trends, arrhythmias), BP at each stage and recovery, symptom assessment (angina, dyspnea, dizziness).
4. Endpoint criteria: Target heart rate (85% age‑predicted max), limiting symptoms, significant ST changes (≥1 mm horizontal/downsloping depression), severe hypotension, sustained arrhythmias, patient request.
5. Recovery phase: 5–10 min supine/sitting; continued ECG/BP monitoring for delayed ischemia or arrhythmias.
6. Imaging adjuncts (if indicated):
   • Stress echocardiography (wall motion).
   • Myocardial perfusion imaging (SPECT/PET with radiotracer).
   • Cardiac MRI stress (less common).
7. Interpretation and report: By cardiologist; includes exercise capacity (METs), hemodynamic response, ECG findings, imaging results, and recommendations.

Indications

• Chest pain evaluation (intermediate pretest probability).
• Risk stratification post‑MI or revascularization.
• Assess functional capacity before surgery or cardiac rehab.
• Evaluate arrhythmia or BP response to exercise.

Safety

Supervised by trained personnel with emergency equipment; complication rate ~1–2 per 10,000 tests.