The parturient with coronary heart disease

Critical Care Management of the Parturient with Cardiac Disease

Parturient with heart disease forms a challenging group of patients and requires specialized critical care support in the peripartum period. Maternal heart disease may remain undiagnosed till the second trimester of pregnancy, presenting frequently after 20 weeks of gestation, due to increased demands imposed on the cardiovascular system and pose a serious risk to the life of mother and fetus. Management of critically ill parturient with heart disease must be tailored according to individual assessment of the patient and requires a strategic, multidisciplinary, and protocol-based approach. A dedicated obstetric intensive care unit (ICU) and team effort are the need of the hour.

HOW TO CITE THIS ARTICLE

Garg R, Hariharan UR, Malik I. Critical Care Management of the Parturient with Cardiac Disease. Indian J Crit Care Med 2021;25(Suppl 3):S230-S240.

Cardiac conditions in pregnancy and the role of midwives: A discussion paper

AIM

This paper provides an overview of the two broad categories of cardiac conditions observed in pregnancy (congenital and acquired). It also identifies the midwives' role in the childbirth continuum and includes assessment, track and trigger systems and management during labour and delivery.

DESIGN

Discussion paper.

METHODS

Data were collected by reviewing international evidence and by searching computerized databases.

RESULTS

Research has identified that women with associated risk factors of a cardiac condition who delay pregnancy have an increased risk of experiencing cardiovascular complications in pregnancy with poorer outcomes. The Three Ps in a Pod clinical initiative in the United Kingdom highlights working as a team in multidisciplinary programmes to improve mothers' care and save lives. Midwives play a key role during pregnancy and need to be appraised in relation to cardiovascular disease observed in pregnancy, its potential risks and anticipated problems and within the continuum of care.

Pregnancy in women with pre-existent ischaemic heart disease: a systematic review with individualised patient data

INTRODUCTION

Studies on pregnancy risk in women with ischaemic heart disease (IHD) have mainly excluded pregnancies in women with pre-existent IHD. There is a need for better information about the pregnancy risks in these women and their offspring.

METHODS

We performed a systematic review searching the PubMed/MEDLINE public database for pregnancy in women with pre-existent IHD analysing the cardiac, obstetric and fetal/neonatal outcome of pregnancy in women with pre-existing IHD. Individual patient data were requested from large series. The primary outcome endpoints was a composite of ischaemic complications including maternal death, acute coronary syndrome and ventricular tachycardia.

RESULTS

116 women with pre-existent IHD had 124 pregnancies including one twin pregnancy. They had a 21% chance of having an uncomplicated pregnancy (completed pregnancy without cardiovascular, obstetric or fetal/neonatal complications, n=26). Primary (ischaemic) endpoints occurred in 9% (n=11). Women with atherosclerosis had more cardiovascular complications compared with pregnancies in women with other underlying pathology for IHD (50%vs23%, P=0.02) but no significant difference in occurrence of primary endpoints (13% vs 9%, P=0.53). There were two maternal cardiac deaths (2%), one of which occurred in the 18th week of pregnancy and the other postpartum. Obstetric complications occurred in 58% (n=65) of pregnancies and fetal/neonatal complications in 42% (n=47).

CONCLUSION

Pregnancies in women with pre-existing IHD are high-risk pregnancies. These women have a high risk of ischaemic cardiovascular complications including 2% maternal mortality. The risk of ischaemic complications is especially high among women with atherosclerotic coronary artery disease.

Spectrum of cardiovascular findings during pregnancy and parturition at a tertiary referral center

AIM

To analyze the spectrum of cardiovascular diseases occurring during pregnancy and delivery at a tertiary referral center.

METHODS

All patients presenting at our institution with pre-existing or first diagnosis of cardiac disease were recruited. Cardiac and obstetric complications and maternal and neonatal outcomes were recorded.

RESULTS

Fifty-two pregnancies in 49 women, including three pregnancy terminations were analyzed. Cardiac lesions were congenital in 26 (53.1%) and acquired in nine (18.4%); six patients (12.2%) had cardiomyopathies, eight (16.3%) ar-rhythmic conditions. A total of 42 women (85.7%) had a pre-existing cardiac condition and seven (14.3%) presented with first manifestation. Overall 22 cardiac complications occurred: five in pregnancy, eight around parturition, nine during follow-up. They included >1 New York Heart Association functional class deterioration (n=5), congestive heart failure/cardiomyopathy (n=5), valve replacement (n=4), sustained arrhythmia (n=3), cerebral insult, aortic dissection, transplantation (one case each), and death (n=2). Mean gestational age at delivery was 36+6. The cesarean section rate was 77.5%; 31.6% were performed for cardiac indications. Obstetric complications happened in 23 pregnancies (46.9%). There was no perinatal loss; cardiac defects were diagnosed in 9.3% (n=5) of offspring.

CONCLUSION

Cardiovascular diseases occurring during pregnancy and parturition comprise a heterogeneous spectrum of conditions. Established scores aid in the identification of high-risk patients; however, in our series 14.3% women had been healthy previously.

Regional anaesthesia for a Caesarean section in women with cardiac disease: a prospective study

BACKGROUND

We conducted a prospective observational survey of pregnant women with cardiac disease. The aim was to analyse and present the mode of delivery, outcome, and haemodynamic changes during a caesarean section under regional anaesthesia in women with cardiac disease.

METHODS

All pregnant women with a cardiovascular diagnosis, except hypertension, were included in the registry. Based on the cardiac diagnoses, and on the New York Heart Association classification, a multidisciplinary group made recommendations for each patient and decided on the mode of delivery. The data from continuous, invasive haemodynamic monitoring in intermediate- and high-risk patients under regional anaesthesia for a caesarean section were analysed and presented.

RESULTS

The hospital had approximately 9000 deliveries in the period from November 2003 to April 2008. A total of 113 pregnancies in 107 women were included. Thirty-two (28.3%) pregnancies were classified into the high-risk category. Of 103 deliveries, caesarean sections were performed in 59 (52.2%) cases, with regional anaesthesia in 51 patients (18 emergencies), general anaesthesia in eight patients (five emergencies), and a planned vaginal delivery in 44 patients. There was no mortality among the mothers or the babies during the hospital stay or 6 months postpartum. Pre-operative cardiovascular stability during the caesarean section was maintained by volume and phenylephrine infusion guided by invasive monitoring of haemodynamic variables.

CONCLUSION

Our study suggests that pregnant women with cardiac disease may safely deliver the baby by a caesarean section under regional anaesthesia. According to our findings, haemodynamic stability can be obtained by titrated regional anaesthesia, intravenous (i.v.) volume, phenylephrine infusion, and small repeated doses of i.v. oxytocin guided by invasive monitoring.

Current world literature

This bibliography is compiled by clinicians from the journals listed at the end of this publication. It is based on literature entered into our database between 1 February 2008 and 31 January 2009 (articles are generally added to the database about two and a half months after publication). In addition, the bibliography contains every paper annotated by reviewers; these references were obtained from a variety of bibliographic databases and published between the beginning of the review period and the time of going to press. The bibliography has been grouped into topics that relate to the reviews in this issue.