High-Yield Heart Gross Anatomy (NEET PG Focus)
Chamber & Border Relations
| Structure | Anatomical Relationship |
|---|---|
| Anterior Surface | Primarily the Right Ventricle. |
| Base (Posterior) | Primarily the Left Atrium. |
| Apex | Left Ventricle (located in the 5th intercostal space, mid-clavicular line). |
NEET PG “Must-Know” Pearls
- Coronary Dominance: Defined by which artery gives off the Posterior Descending Artery (PDA). 80-85% of the population is right-dominant (PDA from RCA).
- Crucial Relations: The coronary sinus runs in the posterior part of the coronary sulcus and drains into the right atrium.
- Valvular Auscultation Areas:
- Aortic: 2nd Right ICS.
- Pulmonary: 2nd Left ICS.
- Tricuspid: 4th-5th Left ICS (parasternal).
- Mitral: 5th Left ICS (mid-clavicular).
- Right Atrium Landmarks: The Crista Terminalis separates the smooth part (sinus venarum) from the rough part (pectinate muscles).