Echocardiography Features of Peripartum Cardiomyopathy
Core Echocardiographic Diagnostic Criteria
- The European Society of Cardiology recommends left ventricular ejection fraction (LVEF) <45% as the primary diagnostic criterion for peripartum cardiomyopathy, with fractional shortening <30% as an alternative measure of systolic dysfunction 1, 2, 3
- Left ventricular end-diastolic dimension >2.7 cm/m² body surface area is part of formal diagnostic criteria, although not all patients present with left ventricular dilatation 1, 2, 4
- Left ventricular end-diastolic diameter >60 mm predicts poor recovery of left ventricular function and carries prognostic significance 1, 4, 5
Prognostic Echocardiographic Features
- LVEF <30% at presentation predicts poor recovery of ventricular function, and left ventricular end-diastolic diameter >60 mm is associated with worse outcomes 1, 4, 5
- Mitral regurgitation is present in a significant proportion of patients, which correlates with echocardiographic findings 1, 4, 6
Critical Complications to Assess
- Left ventricular thrombus is not uncommon in patients with LVEF <35%, and echocardiography is essential for ruling out left ventricular thrombus, particularly when LVEF is severely depressed 1, 4, 6
Timing of Echocardiographic Assessment
- Initial echocardiography should be performed as quickly as possible when peripartum cardiomyopathy is suspected, with repeat assessments before patient discharge, at 6 weeks, 6 months, and annually to evaluate treatment efficacy and recovery 1, 4, 5
Distinguishing Features from Other Cardiomyopathies
- Pre-existing idiopathic or familial dilated cardiomyopathy typically presents with larger cardiac dimensions than peripartum cardiomyopathy and usually manifests by the 2nd trimester rather than postpartum 5, 7, 6
- HIV cardiomyopathy often presents with non-dilated ventricles 5, 7, 8
Common Pitfalls
- The European Society of Cardiology advises against excluding peripartum cardiomyopathy based solely on absence of left ventricular dilatation, as the ventricle may not be dilated 1, 3
- Left ventricular thrombus screening should not be missed in patients with LVEF <35%, as this carries significant embolic risk 1, 4, 6, 3