HELLP syndrome
ICD-10 O14.2 · ICD-11 JA24.2

Treatment of HELLP Syndrome with Myasthenia Gravis When Magnesium Sulfate Is Contraindicated

HELLP syndrome requires urgent, structured management. This protocol addresses a specific sub-population: patients in whom magnesium sulfate cannot be used — including those with myasthenia gravis, as well as hypocalcemia, moderate-to-severe renal failure, cardiac ischemia, heart block, or myocarditis.

Clinical Scenario

This protocol applies when HELLP syndrome occurs alongside myasthenia gravis or another condition that makes magnesium sulfate contraindicated or unavailable — including hypocalcemia, moderate-to-severe renal failure, cardiac ischemia, heart block, or myocarditis. In these patients, standard seizure prophylaxis cannot proceed as usual, and specific alternative strategies are required.

Treatment Overview

Delivery is indicated after maternal stabilisation, regardless of gestational age. Because magnesium sulfate cannot be used, seizure prophylaxis relies on alternative agents — benzodiazepines or phenytoin — and antihypertensive treatment is initiated for severe-range blood pressure. The full evidence-based regimen, including specific agent selection, sequencing, and gestational-age considerations, is in the complete protocol.

Treatment Goals

Within 7 days after delivery: platelet count above 100,000 ×109/L on a rising trend, and a decreasing trend in liver enzyme values.

Instant Access to Structured Evidence-Based Regimens
References

DOI: 10.1097/AOG.0000000000003891

Benzodiazepines and phenytoin are justified only in the context of antiepileptic treatment or when magnesium sulfate is contraindicated or unavailable (myasthenia gravis, hypocalcemia, moderate-to-severe renal failure, cardiac ischemia, heart block, or myocarditis).

Considering the serious nature of this entity, with increased rates of maternal morbidity and mortality, many authors have concluded that women with HELLP syndrome should be delivered regardless of their gestational age.

Antihypertensive treatment should be initiated expeditiously for acute-onset severe hypertension (systolic blood pressure of 160 mm Hg or more or diastolic blood pressure of 110 mm Hg or more, or both) that is confirmed as persistent (15 minutes or more).

With supportive care alone, 90% of patients with HELLP syndrome will have platelet count more than 100,000 ×109/L and reversed trend (decrease) in liver enzymes values within 7 days after delivery.

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