## ASA Classification in Cardiovascular Disease **Key Point:** Stable coronary artery disease on optimal medical therapy with no functional limitation is classified as ASA II, not ASA III. The presence of disease alone does not determine the class; functional impact is paramount. ### Distinguishing ASA II from ASA III in Cardiac Patients | Feature | ASA II | ASA III | |---------|--------|--------| | Disease presence | Yes, mild systemic disease | Yes, severe systemic disease | | Functional limitation | None or minimal | Present; affects daily activities | | Symptom control | Well-controlled on medication | Poorly controlled or symptomatic | | Example: CAD | Stable, no angina at rest/exertion | Unstable angina, angina with minimal exertion | | Example: HTN | Controlled on medication | Uncontrolled, end-organ damage | | Perioperative risk | Moderate | High | **High-Yield:** The ASA classification hinges on **functional status**, not merely the presence of disease. A patient with multiple comorbidities but excellent functional status may be ASA II, while a patient with one disease causing significant limitation may be ASA III. **Clinical Pearl:** Stable CAD on beta-blockers, ACE inhibitors, and statins with no anginal symptoms at normal activity levels is ASA II. Only if the patient develops angina with minimal exertion, has unstable symptoms, or requires recent revascularization would the classification shift to ASA III. **Mnemonic:** **F**unctional **L**imitation = **ASA class** determinant. No limitation despite disease = ASA II.
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