What are the diagnostic criteria of Peri-partum cardiomyopathy (PPCM)?

Peripartum cardiomyopathy (PPCM): Diagnostic criteria

• Presentation in the last month of pregnancy or within five months of delivery 
• Absence of an apparent cause for heart failure
• Previously normal cardiac status
• Echocardiographic evidence of systolic left ventricular dysfunction

Source:

• Davidsons Principles and Practice of Medicine 23 edition: 1282
• Harrison’s Principles of Internal Medicine 2 volumes 19th Edition: 1562 (2130)