Postpartum maternal tachycardia – diagnostic pitfalls!

PURPOSE OF REVIEW: Maternal tachycardia is a common sign with a multitude of causes. We attempt to look at the most common sinister ones in the postpartum period. RECENT FINDINGS: Current guidelines differ in the definition of maternal tachycardia. It has been associated with adverse outcomes such as increased length of stay as well as higher mortality if there is underlying peripartum cardiomyopathy. Some recent studies look at common investigations and how these apply to peripartum women, such as ECG markers of arrhythmogenesis, reference ranges for PCT and echocardiogram findings during pregnancy prior to diagnosis of peripartum cardiomyopathy. SUMMARY: Physiological changes make it difficult to interpret maternal tachycardia and thus how best to manage it. We propose the idea of a three-step approach for the assessment of patients, aiming to identify causes including tachyarrhythmias, obstetric haemorrhage, sepsis, venous thromboembolism and peripartum cardiomyopathy.The first step 'BEDSIDE' applies to all patients looking at observations, history and examination. The second step 'BASIC', applies to most patients and covers ECG and basic blood tests. The final step 'EXTRA' assesses the need for further investigations including additional blood tests and imaging. By using this model, clinicians and healthcare professionals should be able to rationalise the need for more invasive investigations whilst maintain good high-quality care.