💡 Anterior MI = V1-V4 (LAD). Inferior MI = II, III, aVF (RCA). Atrial fib = no P waves.

💡 Parkinson's = TRAP (Tremor, Rigidity, Akinesia, Postural instability). Substantia nigra.

💡 Asthma = Reversible airway obstruction. COPD = Irreversible. FEV1/FVC < 0.70.

💡 Primary Hypothyroid = High TSH, Low T4. Primary Hyperthyroid (Graves) = Low TSH, High T4.