## Door-to-Balloon Time in STEMI **Key Point:** The door-to-balloon time is the interval from first medical contact (arrival at hospital) to inflation of the angioplasty balloon during primary PCI. This is a critical performance metric in STEMI management. ### Recommended Timeframe **High-Yield:** The guideline-recommended maximum door-to-balloon time is **90 minutes** for primary PCI in STEMI. This applies to all patients presenting within 12 hours of symptom onset. ### Clinical Significance Every 30-minute delay in achieving reperfusion increases 1-year mortality by approximately 7.5%. Achieving door-to-balloon time ≤90 minutes is associated with: - Reduced infarct size - Improved left ventricular function - Lower in-hospital mortality - Better long-term outcomes ### Special Circumstances - **Door-to-balloon time 90–120 minutes:** Acceptable if PCI-capable center is distant; still superior to fibrinolysis - **Fibrinolysis alternative:** Door-to-needle time should be ≤30 minutes if PCI cannot be performed within 120 minutes of first medical contact **Clinical Pearl:** In India, where many STEMI patients present to non-PCI centers, rapid transfer protocols and telemedicine-assisted diagnosis are essential to meet the 90-minute target. 
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.