Here is a summary of what each section covers:

1. Heart Failure - Covers HFrEF vs HFpEF vs HFmrEF, ACC/AHA staging (A-D) and NYHA classes, RAAS/SNS neurohormonal pathophysiology, LV remodeling, full work-up, the 4 pharmacologic pillars (ACE-I/ARB, beta-blocker, aldosterone antagonist, SGLT2i), plus device therapy (ICD, CRT, LVAD).

2. Coronary Artery Disease - Risk factors and population-attributable risk, plaque rupture/erosion mechanism, the full ACS spectrum (stable angina → UA → NSTEMI → STEMI), symptom likelihood ratios, STEMI/NSTEMI diagnostic and management pathways, revascularization strategies (PCI vs CABG), and secondary prevention drug regimens.

3. Valvular Heart Disease - Detailed clinical notes on all 5 key valvular conditions: Aortic Stenosis (classic triad, TAVR vs SAVR), Aortic Regurgitation (acute vs chronic, wide pulse pressure signs), Mitral Stenosis (rheumatic disease, valvuloplasty criteria), Mitral Regurgitation (primary vs secondary), and Mitral Valve Prolapse.

4. Arrhythmias - Full rhythm classification, AF management (rate control/rhythm control/anticoagulation/CHA₂DS₂-VASc), VT types and acute management, AV block grading, Vaughan Williams drug classification with the critical CAST trial lesson on Class Ic drugs, and ICD indications (primary and secondary prevention).