| Code | Title | 
					
				| – | Top Categories | 
		
					
				| 0 | Medical and Surgical | 
					
				| 02 | Heart and Great Vessels | 
					
				| 02N | Release
					Heart and Great Vessels, Release | 
					
				| 02N0 | Coronary Artery, One Artery | 
					
				| 02N1 | Coronary Artery, Two Arteries | 
					
				| 02N2 | Coronary Artery, Three Arteries | 
					
				| 02N3 | Coronary Artery, Four or More Arteries | 
					
				| 02N4 | Coronary Vein | 
					
				| 02N5 | Atrial Septum | 
					
				| 02N6 | Atrium, Right | 
					
				| 02N7 | Atrium, Left | 
					
				| 02N8 | Conduction Mechanism | 
					
				| 02N9 | Chordae Tendineae | 
					
				| 02ND | Papillary Muscle | 
					
				| 02NF | Aortic Valve | 
					
				| 02NG | Mitral Valve | 
					
				| 02NH | Pulmonary Valve | 
					
				| 02NJ | Tricuspid Valve | 
					
				| 02NK | Ventricle, Right | 
					
				| 02NL | Ventricle, Left | 
					
				| 02NM | Ventricular Septum | 
					
				| 02NN | Pericardium | 
					
				| 02NP | Pulmonary Trunk | 
					
				| 02NQ | Pulmonary Artery, Right | 
					
				| 02NR | Pulmonary Artery, Left | 
					
				| 02NS | Pulmonary Vein, Right | 
					
				| 02NT | Pulmonary Vein, Left | 
					
				| 02NV | Superior Vena Cava | 
					
				| 02NW | Thoracic Aorta, Descending | 
					
				| 02NX | Thoracic Aorta, Ascending/Arch |