259 Ch 258. Electrocardiography (ECG)

12-lead ECG = essential first-line test; systematic approach (rate + rhythm + axis + intervals + chambers + ischemia); STEMI recognition life-saving; LBBB / paced rhythm = challenging (Sgarbossa criteria); 22E AI-ECG (e.g., LVEF estimation, AF prediction) emerging; 2024 ESC updated chest pain + acute coronary guidelines。