A 48 years old patient with history of stable angina becomes dysneic walking 3 km belongs to ASA class-

ASA Grading and Predictive Moality ASA Grade Definition Moality % I Normal healthy individual 0.06 II Mild systemic disease that doesn't limit activity 0.4 III Severe systemic disease that limits activity 4.5 IV Severe systemic disease that is constant threat to life 23 V Moribund, not expected to survive 24 hrs with or without surgery 51