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Living FRIendly Summaries of the Body of Evidence using Epistemonikos (FRISBEE)
Medwave 2016;16(Suppl5):e6970 doi: 10.5867/medwave.2016.6970
Is electroconvulsive therapy during pregnancy safe?
Magdalena Jiménez-Cornejo, Natalia Zamorano-Levi, Álvaro Jeria
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Abstract

Therapeutic options for psychiatric conditions are limited during pregnancy because many drugs are restricted or contraindicated. Electroconvulsive therapy constitutes an alternative, however there is controversy over its safety. Using the Epistemonikos database, which is maintained by searching multiple databases, we found five systematic reviews, including 81 studies overall describing case series or individual cases. Data were extracted from the identified reviews and summary tables of the results were prepared using the GRADE method. We concluded it is not clear what are the risks associated with electroconvulsive therapy during pregnancy because the certainty of the existing evidence is very low. Likewise, existing systematic reviews and international clinical guidelines differ in their conclusions and recommendations.


 
Problem

Many of the drugs that are used to treat psychiatric conditions have restrictions or even contraindications during pregnancy, which limit the therapeutic options in this group of patients. Electroconvulsive therapy is one of the interventions that are usually considered as a safe and effective alternative for the treatment of severe or resistant conditions during pregnancy, mainly in depression. There is consensus that it is the therapy of choice in such cases, especially when there is a vital risk to the mother or the fetus. However, in less serious cases where this treatment could also be an option to consider, there is controversy, largely because it is unclear what the risks are. On the other hand, the recommendations given by different clinical guidelines differ among them.

Methods

We used Epistemonikos database, which is maintained by screening multiple databases, to identify systematic reviews and their included primary studies. With this information, we generated a structured summary using a pre-established format, which includes key messages, a summary of the body of evidence (presented as an evidence matrix in Epistemonikos), meta-analysis of the total of studies, a summary of findings table following the GRADE approach and a table of other considerations for decision-making.

Key messages

  • It is unclear what are the risks associated with electroconvulsive therapy during pregnancy because the certainty of the evidence is very low.
  • Systematic reviews and existing clinical guidelines differ in their conclusions and recommendations.
About the body of evidence for this question

What is the evidence.
See evidence matrix  in Epistemonikos later

We found five systematic reviews [1],[2],[3],[4],[5] which include 81 primary studies overall [6],[7],[8],[9],[10],
[11],[12],[13],[14],[15],[16],[17],[18],[19],[20],[21],
[22],[23],[24],[25],[26],[27],[28],[29],[30],[31],[32],
[33],[34],[35],[36],[37],[38],[39],[40],[41],[42],[43],
[44],[45],[46],[47],[48],[49],[50],[51],[52],[53],[54],
[55],[56],[57],[58],[59],[60],[61],[62],[63],[64],[65],
[66],[67],[68],[69],[70],[71],[72],[73],[74],[75],[76],
[77],[78],[79],[80],[81],[82],[83],[84],[85],[86], all corresponding to series or case reports that answer the question of interest. No randomized controlled trials were identified, neither any other studies comparing against a control group.

What types of patients were included

Seventeen studies included patients requiring electroconvulsive therapy during the first trimester of pregnancy [12],[13],[16],[19],[30],[34],[36],[38],[44],
[62],[64],[67],[68],[74],[77],[81],[84], 45 studies during the second trimester [6],[7],[8],[9],[11],[12],[13],[14],
[15],[17],[18],[19],[21],[24],[25],[29],[30],[31],[32],
[33],[35],[37],[41],[43],[45],[47],[49],[50],[51],[54],
[56],[60],[61],[63],[66],[67],[69],[71],[73],[74],[78],
[83],[84],[85],[86], and 30 during the third [12],[13],
[17],[19],[22],[23],[26],[27],[29],[37],[39],[40],[42],
[46],[52],[57],[58],[59],[65],[66],[70],[72],[73],[75],
[76],[78],[79],[80],[82],[84]. In 11 studies the time of gestation when electroconvulsive therapy was applied was not clear, [10],[16],[20],[21],[28],[29],[32],[48],[53],[55],[84].
The diagnosis for which electroconvulsive therapy was required was a major depressive episode in 43 studies
[9],[10],[11],[12],[13],[14],[18],[19],[21],[22],[23],[24],
[28],[29],[30],[31],[33],[35],[37],[39],[40],[41],[42],[43],
[44],[45],[47],[48],[50],[51],[52],[57],[59],[62],[63],[65],
[67],[69],[72],[73],[76],[80],[81],[82],[84],[85], bipolar disease in 16 [6],[7],[12],[13],[21],[26],[34],[56],[60],
[64],[66],[70],[71],[73],[79],[83] and schizophrenia in 18 studies [6],[12],[15],[19],[23],[25],[27],[28],[40],[41],
[42],[53],[54],[55],[58],[61],[84],[86]. Other reported diagnoses were psychosis, confusional state, schizoaffective and schizophreniform disorder, neuroleptic malignant syndrome and obsessive-compulsive disorder [6],[13],[17],[19],[32],[36],[38],[49],[54],[63],[67]. In 12 studies the diagnosis was not reported [8],[16],[20],[29],[46],[66],[68],[74],[75],[77],[78],[84]. 
In 11 studies patients also received medications to manage their psychiatric disorders during pregnancy, mainly antipsychotics, benzodiazepines and antidepressants [13],[34],[38],[49],[50],[55],[60],[67],[71],[82],[86].

What types of interventions were included

In all studies, patients received electroconvulsive therapy sessions. In two studies [33],[70] reported unilaterally and in 16 studies [11],[22],[23],[24],[25],[35],[38],[50],
[52],[61],[62],[64],[76],[79],[80],[82] bilateral.

The total number of sessions ranged from 1 to 35. The timing of electroconvulsive therapy sessions fluctuated between week two of gestation through week 40.

The frequency of electroconvulsive therapy was reported in 22 studies [9],[11],[22],[23],[24],[25],[27],[29],[31],
[33],[35],[39],[52],[60],[61],[62],[64],[66],[67],[76],
[79],[80] and varied between 1 time every 2 weeks and 3 times a week. 37 studies refer to the type of anesthesia they used [7],[9],[11],[18],[19],[22],[23],[24],[27],[33],
[34],[35],[38],[40],[43],[44],[45],[46],[48],[49],[50],[51],
[52],[56],[60],[61],[62],[63],[69],[70],[71],[76],[79],[80],
[82],[83],[84].

No study had a control group.

What types of outcomes
were measured

The studies measured multiple outcomes, however, different systematic reviews grouped them as follows:

  • Maternal adverse effects: respiratory alkalosis, vaginal bleeding, abdominal pain, contractions, premature labor, aspiration.
  • Fetal adverse effects: Abortion, fetal stillbirth, complications after birth, fetal arrhythmia, malformations.
  • Clinical improvement, symptom remission measured by score variation at different scales.
Summary of findings

The information on the use of electroconvulsive therapy during pregnancy is based on 81 studies reporting case series or isolated cases, corresponding to 404 patients. The summary of the results is as follows:

  • It is unclear what are the risks associated with electroconvulsive therapy during pregnancy because the certainty of the evidence is very low.


Other considerations for decision-making

To whom this evidence does and does not apply
  • This evidence applies to pregnant women during any gestation period who are undergoing psychiatric disorders for which electroconvulsive therapy is required.
  • This summary does not address the efficacy of electroconvulsive therapy in the different pathologies in which it is used, which might not differ between pregnant women and the non-pregnant population.
  • This summary does not address the safety of electroconvulsive therapy in the non-pregnant population, but focuses on maternal-fetal complications and on the newborn.
About the outcomes included in this summary
  • According to the opinion of the authors of this summary, perinatal mortality is one of the critical outcomes for decision making, but not the only one. Unfortunately, the studies, and therefore the reviews, provide a very general synthesis of these effects, so it has been presented in this way in the summary of findings table.
Balance between benefits and risks, and certainty of the evidence
  • It is not clear whether the use of electroconvulsive therapy is completely safe for the management of psychiatric pathology in pregnant women, because the certainty of the evidence is very low.
  • The most frequently reported adverse events in the studies are vaginal bleeding, abdominal pain, contractions, premature labor, aspiration, and fetal complications such as abortion, stillbirth, complications after birth, fetal arrhythmia, and malformations.
  • It is not possible to estimate the balance between benefits and risks, due to the existing uncertainty.
What would patients and their doctors think about this intervention
  • In cases where the psychiatric condition threatens the life of the mother or the child, there is probably little doubt about the need to use this measure. At the other extreme, in cases where the benefits are minor, or questionable, it is reasonable to abstain. The vast majority of the time the balance between benefits and risks will be uncertain, so it is important to evaluate this measure with caution. Regardless of the decision to be made, it is particularly important to report the uncertainty to patients, their relatives or caregivers.
Resource considerations
  • It is not possible to make an appropriate balance between benefits and costs, due to the current uncertainty.
  • While electroconvulsive therapy is associated with generally high costs, in most cases this factor should not be the primary determinant in decision-making.

Differences between this summary and other sources
  • The conclusions of this summary partially disagree with the systematic reviews identified, which in turn come to different conclusions. Most indicate that electroconvulsive therapy is relatively safe, and that its benefits outweigh the risks, without putting a clear accent on the certainty of the evidence. One of the reviews concluded that this therapy should be used only as a last resort and under strict clinical criteria [3].
  • With regard to international clinical guidelines, both the APA guideline on the use of electroconvulsive therapy [87] and the Australian and New Zealand guidelines for the management of mood disorders [88] partially disagree with the conclusions of this summary. Both indicate electroconvulsive therapy is generally safe for both the fetus and the mother, and even the Australian guideline indicates that electroconvulsive therapy may be the therapy of choice in patients with severe mood disorders. On the other hand, the NICE Guideline [89] of electroconvulsive therapy argues that given the poor quality of the evidence regarding the safety of this therapy, it should be used with caution.
Could this evidence change in the future?
  • It is very likely that the conclusions of this summary will change with future studies, due to the high degree of uncertainty.
  • We did not identify ongoing studies that address the subject at the International Clinical Trials Registry Platform of the World Health Organization.
How we conducted this summary

Using automated and collaborative means, we compiled all the relevant evidence for the question of interest and we present it as a matrix of evidence.

Follow the link to access the interactive version: Electroconvulsive therapy during pregnancy

Notes

The upper portion of the matrix of evidence will display a warning of “new evidence” if new systematic reviews are published after the publication of this summary. Even though the project considers the periodical update of these summaries, users are invited to comment in Medwave or to contact the authors through email if they find new evidence and the summary should be updated earlier. After creating an account in Epistemonikos, users will be able to save the matrixes and to receive automated notifications any time new evidence potentially relevant for the question appears.

The details about the methods used to produce these summaries are described here http://dx.doi.org/10.5867/medwave.2014.06.5997.

Epistemonikos foundation is a non-for-profit organization aiming to bring information closer to health decision-makers with technology. Its main development is Epistemonikos database (www.epistemonikos.org).

These summaries follow a rigorous process of internal peer review.

Conflicts of interest
The authors do not have relevant interests to declare.

Licencia Creative Commons Esta obra de Medwave está bajo una licencia Creative Commons Atribución-NoComercial 3.0 Unported. Esta licencia permite el uso, distribución y reproducción del artículo en cualquier medio, siempre y cuando se otorgue el crédito correspondiente al autor del artículo y al medio en que se publica, en este caso, Medwave.

 

Muchos de los fármacos que se utilizan para tratar patologías psiquiátricas tienen ciertas restricciones o incluso se encuentran contraindicados durante el embarazo, lo cual restringe las opciones terapéuticas en este grupo de pacientes. La terapia electroconvulsiva constituye una alternativa efectiva, sin embargo, existe controversia sobre su seguridad. Utilizando la base de datos Epistemonikos, la cual es mantenida mediante búsquedas en múltiples bases de datos, se identificaron cinco revisiones sistemáticas que incluyen 81 estudios describiendo series de casos o casos individuales. Se extrajeron los datos de las revisiones identificadas y se construyeron tablas de resumen de los resultados utilizando el método GRADE. Se concluye que no está claro cuáles son los riesgos asociados a la terapia electroconvulsiva durante el embarazo, dada la baja certeza que provee la evidencia. Asimismo, revisiones sistemáticas y guías clínicas internacionales existentes difieren en sus conclusiones y recomendaciones.

Authors: Magdalena Jiménez-Cornejo[1,2], Natalia Zamorano-Levi[1,2], Álvaro Jeria[2,3]

Affiliation:
[1] Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
[2] Proyecto Epistemonikos, Santiago, Chile
[3] Servicio de Psiquiatría y Salud Mental, Hospital Sótero del Río, Santiago, Chile

E-mail: dr.alvarojeria@gmail.com

Author address:
[1] Concha y Toro 3459, Puente Alto. Santiago, Chile.

Citation: Jiménez-Cornejo M, Zamorano-Levi N, Jeria A. Is electroconvulsive therapy during pregnancy safe? . Medwave 2016;16(Suppl5):e6970 doi: 10.5867/medwave.2016.6970

Publication date: 7/12/2016

PubMed record

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Gin S Malhi, Darryl Bassett, Philip Boyce, et al. Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for mood disorders. Australian & New Zealand Journal of Psychiatry 2015, Vol. 49(12) 1087–1206 | CrossRef |

National Institute for Care and health Excellence (NICE). Guidance on the use of electroconvulsive therapy.05/02/2003. | Link |

July 2022, Vol 22, Issue 6
icon Research papers
Association of biomarkers and severity of COVID-19: A crosssectional study

Systematization of initiatives in sexual and reproductive health about good practices criteria in response to the COVID-19 pandemic in primary health care in Chile

Clinical, psychological, social, and family characterization of suicidal behavior in Chilean adolescents: a multiple correspondence analysis

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