- 420 Acute pericarditis
- 421 Acute and subacute endocarditis
- 422 Acute myocarditis
- 423 Other diseases of pericardium
- 424 Other diseases of endocardium
- 425 Cardiomyopathy
- 426 Conduction disorders
- 427 Cardiac dysrhythmias
- 428 Heart failure
- 429 Ill-defined descriptions and complications of heart disease
