💡 Anterior MI = V1-V4 (LAD). Inferior MI = II, III, aVF (RCA).

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

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

💡 Primary Hypothyroid = High TSH, Low T4. Graves = Low TSH, High T4.

💡 Crohn's = skip lesions, transmural. UC = continuous, mucosal only.

💡 AKI: Pre-renal (low perfusion), Renal (ATN), Post-renal (obstruction).

💡 DIC = low platelets + low fibrinogen + raised D-dimer. ITP = isolated low platelets.

💡 SLE = ANA + anti-dsDNA. RA = anti-CCP. Wegener's = c-ANCA.

💡 Dengue: Tourniquet test +, thrombocytopenia. Typhoid: Widal test, Salmonella typhi.

💡 OP poisoning = miosis, bradycardia, treat with Atropine + Pralidoxime.

💡 Acanthosis nigricans = insulin resistance. Erythema nodosum = sarcoidosis, TB.

💡 CT for acute stroke. MRI for posterior fossa. USG first for abdomen.