Article Type : Review Article
Title :   Eclampsia in Pregnancy: A Comprehensive Review of Etiology, Pathophysiology, Clinical Features, and Management
Authors :   Mayuri Fulari
Abstract :   Eclampsia is a severe and life-threatening obstetric complication characterized by the occurrence of seizures in a woman with pre-eclampsia that cannot be attributed to other neurological causes. It remains a major contributor to maternal and perinatal morbidity and mortality, particularly in low- and middle-income countries. Although preventable in most cases with early detection and appropriate management of pre-eclampsia, eclampsia continues to challenge healthcare systems due to delayed diagnosis, inadequate antenatal care, and limited resources. This review aims to provide a comprehensive overview of the epidemiology, etiology, pathophysiology, clinical manifestations, diagnostic approach, management strategies, and preventive measures for eclampsia in pregnancy.
Introduction :   Hypertensive disorders of pregnancy constitute one of the most common medical complications during gestation and are a leading cause of maternal and perinatal morbidity and mortality worldwide1. Eclampsia represents the most severe form of the spectrum of hypertensive disorders of pregnancy and is defined as the occurrence of convulsions in a woman with pre-eclampsia that cannot be explained by other neurological conditions such as epilepsy, intracranial hemorrhage, or infections 2. Pre-eclampsia is characterized by new-onset hypertension and proteinuria after 20 weeks of gestation, often associated with multi-organ dysfunction 3. When pre-eclampsia progresses to seizures or coma, it is termed eclampsia. Despite advances in obstetric care, eclampsia remains a significant public health concern in developing countries due to poor antenatal surveillance, delayed referral, and inadequate emergency obstetric services 4.
Review of Literature :  Methodology This review was conducted through a comprehensive search of electronic databases including PubMed, Google Scholar, Cochrane Library, WHO publications, and national obstetric guidelines. Key terms used for the search included “eclampsia,” “pre-eclampsia,” “hypertensive disorders of pregnancy,” “maternal seizures,” and “pregnancy-induced hypertension.” Articles published in English over the last 15–20 years were preferentially reviewed. Relevant observational studies, randomized controlled trials, systematic reviews, WHO recommendations, and standard obstetrics textbooks were included to ensure evidence-based synthesis.
Discussion :  1. Epidemiology of Eclampsia5 Eclampsia occurs in approximately 1 in 2000 pregnancies in developed countries and 1 in 100–500 pregnancies in developing countries. It accounts for nearly 10–15% of maternal deaths globally. The burden is disproportionately high in South Asia and sub-Saharan Africa. In India, hypertensive disorders account for around 8–10% of maternal deaths, with eclampsia being a major contributor. The majority of cases occur in women with inadequate antenatal care. 2. Etiology and Risk Factors6 The exact cause of eclampsia remains unknown, but it is considered the end result of severe pre-eclampsia. Risk factors include: Primigravidity Extremes of maternal age (<18 years or >35 years) Multiple pregnancy Previous history of pre-eclampsia or eclampsia Chronic hypertension Diabetes mellitus Renal disease Autoimmune disorders (e.g., systemic lupus erythematosus) Obesity and poor nutritional status Low socioeconomic status and limited access to antenatal care 3. Pathophysiology7 The pathogenesis of eclampsia is complex and not completely understood. It is believed to originate from abnormal placentation resulting in reduced uteroplacental perfusion and placental ischemia. This leads to the release of anti-angiogenic and inflammatory factors into the maternal circulation, causing widespread endothelial dysfunction. Key pathological mechanisms include: Generalized vasospasm Increased capillary permeability Activation of coagulation pathways Cerebral edema, vasospasm, and ischemia Disruption of the blood-brain barrier leading to seizures These changes result in multiorgan involvement affecting the brain, liver, kidneys, lungs, and coagulation system. 4. Clinical Features8 Eclampsia may occur: Antepartum (before labor) – most common Intrapartum (during labor) Postpartum (within 48 hours, rarely up to 4 weeks) Common prodromal symptoms include: Severe headache Visual disturbances (blurring, scotoma) Epigastric or right upper quadrant pain Nausea and vomiting Sudden swelling of face and hands The hallmark feature is generalized tonic-clonic seizures, often followed by postictal unconsciousness. Associated signs include severe hypertension, proteinuria, pulmonary edema, oliguria, and signs of organ dysfunction. 5. Diagnosis9 Eclampsia is a clinical diagnosis based on: New-onset tonic-clonic seizures in a woman with pre-eclampsia Blood pressure ?140/90 mmHg Proteinuria ?300 mg/24 hours or evidence of end-organ dysfunction Investigations include: Complete blood count (for hemoconcentration, thrombocytopenia) Liver function tests (elevated transaminases) Renal function tests (serum creatinine, uric acid) Coagulation profile Urine examination for protein Fundoscopy and neuroimaging in atypical cases 6. Classification Eclampsia is classified based on the timing of seizures: Antepartum eclampsia – before onset of labor Intrapartum eclampsia – during labor Postpartum eclampsia – after delivery (most within 48 hours) 7. Management of Eclampsia10 Eclampsia is an obstetric emergency requiring immediate and multidisciplinary management. Immediate Management (ABC Approach) Airway protection Breathing – oxygen administration Circulation – IV access and fluid management Control of Seizures Magnesium sulfate is the drug of choice Loading dose: 4 g IV + 5 g IM in each buttock Maintenance: 5 g IM every 4 hours or 1 g/hour IV Benzodiazepines or phenytoin are alternatives when magnesium is contraindicated. Control of Hypertension Labetalol Hydralazine Nifedipine Delivery Definitive treatment of eclampsia is delivery of the fetus and placenta, regardless of gestational age, after maternal stabilization. Mode of delivery depends on obstetric indications and cervical status. 8. Complications of Eclampsia5 Maternal complications: Cerebral hemorrhage Pulmonary edema Acute renal failure HELLP syndrome Disseminated intravascular coagulation (DIC) Maternal death Fetal complications: Intrauterine growth restriction (IUGR) Preterm birth Birth asphyxia Stillbirth Neonatal death 9. Prevention and Control7 Regular antenatal check-ups Early detection and treatment of pre-eclampsia Low-dose aspirin in high-risk women Calcium supplementation in low-intake populations Timely referral and institutional delivery Training of healthcare workers in emergency obstetric care In India, programs under the National Health Mission (NHM) emphasize screening and management of hypertensive disorders during pregnancy. 10. Impact of Eclampsia on Maternal and Perinatal Health4 Eclampsia significantly increases the risk of maternal mortality, prolonged hospitalization, neurological deficits, and long-term cardiovascular disease. It also contributes to high perinatal mortality due to prematurity, low birth weight, and birth asphyxia. The psychosocial and economic burden on families and healthcare systems is substantial.
Conclusion :  Eclampsia remains a devastating but largely preventable complication of pregnancy. It represents the extreme end of the pre-eclampsia spectrum and is associated with serious maternal and fetal outcomes. Early identification of pre-eclampsia through regular antenatal care, timely initiation of antihypertensive therapy, prophylactic use of magnesium sulfate in severe cases, and prompt delivery are the cornerstones of effective management. Strengthening primary healthcare services, improving maternal nutrition, and enhancing community awareness are essential to reducing the burden of eclampsia, especially in resource-limited settings.
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