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Book cover for The ESC Textbook of Cardiovascular Medicine (3 edn) The ESC Textbook of Cardiovascular Medicine (3 edn)

Contents

Disclaimer
Oxford University Press makes no representation, express or implied, that the drug dosages in this book are correct. Readers must therefore always … More Oxford University Press makes no representation, express or implied, that the drug dosages in this book are correct. Readers must therefore always check the product information and clinical procedures with the most up to date published product information and data sheets provided by the manufacturers and the most recent codes of conduct and safety regulations. The authors and the publishers do not accept responsibility or legal liability for any errors in the text or for the misuse or misapplication of material in this work. Except where otherwise stated, drug dosages and recommendations are for the non-pregnant adult who is not breastfeeding.

This chapter provides the background information and detailed discussion of the data for the following current ESC Guidelines on: graphic management of cardiovascular diseases during pregnancy - https://dbpia.nl.go.kr/eurheartj/article/39/34/3165/5078465#135911105

Pregnant women with pre-existing cardiovascular disease may require drug therapy during their pregnancy and lactation period. There are no uniform recommendations for selection of medications, dosing, and timing of treatment. Possible adverse or teratogenic effects of the drugs on the fetus must be weighed against the maternal indication of drug treatment. This chapter gives an overview of medical treatment options for cardiovascular diseases in pregnancy. Furthermore, sources of evidence which can be used for risk classification of drugs applied during pregnancy are shown.

There are no uniform recommendations for selection of medications, dosing, and timing of treatment. Possible adverse or teratogenic effects of the drugs on the fetus must be weighed against the maternal indication of drug treatment.

Different sources of evidence can be used for risk classification of drugs applied during pregnancy. Box 53.10.1 shows the classification of the US Department of Health and Human Services (Food and Drug Administration).

Box 53.10.1
US Food and Drug Administration classification of drugs for use in pregnancy

Category A (safest).

Category B: either animal reproduction studies have not demonstrated a fetal risk but there are no controlled studies in pregnant women, or animal reproduction studies have shown an adverse effect that was not confirmed in controlled studies in women.

Category C: either studies in animals have revealed adverse effects on the fetus and there are no controlled studies in women, or studies in women and animals are not available. Drugs should be given only if potential benefits justify the potential risk to the fetus.

Category D: there is evidence of human fetal risk, but the benefits from use in pregnant woman may be acceptable despite the risk (e.g. treatment of life-threatening conditions).

Category X: studies in animals or human beings have demonstrated fetal abnormalities, or there is evidence of fetal risk based on human experience or both, and the risk of the use of the drug in pregnant women clearly outweighs any possible benefit. The drug is contraindicated in women who are or may become pregnant.

Source: Drug Information for the Health Care Professional; USDPI Vol 1, Micromedex 23rd ed, 01.01.2003. Adapted and modified from Bonow et al.1

There are also various Internet databases where information is given on the use of drugs in pregnancy (Box 53.10.2).

Box 53.10.2
Internet databases giving information on the use of drugs in pregnancy
1.

http://www.embryotox.de—a German database of the Pharmakovigilanz- und Beratungszentrum für Embryonaltoxikologie of the Berliner Betrieb für Zentrale Gesundheitliche Aufgabe. Recommendations are based on a combination of scientific sources and expert opinions, mainly based on observational data.

2.

http://www.safefetus.com—an English database, arranged comparably to the German database.

Heart failure during pregnancy should be treated according to guidelines on acute and chronic heart failure.2 Angiotensin-converting enzyme (ACE) inhibitors, angiotensin II receptor blockers, and renin inhibitors are contraindicated because of fetotoxicity.3,4

Nitrates can be used instead of ACE inhibitors/angiotensin II receptor blockers for afterload reduction. Dopamine and levosimendan can be used if inotropic drugs are needed.

When ACE inhibitors are needed during breastfeeding, benazepril, captopril, or enalapril should be preferred.

Beta-blocker treatment is indicated for patients with heart failure.5 Beta1-selective beta blockers, such as metoprolol, are preferred. Most are excreted in breast milk but they are generally well tolerated, although a decrease in fetal heart rate can be observed. Atenolol is classified as a category D agent by the Food and Drug Administration, related to growth retardation in babies receiving atenolol in the first trimester and a higher prevalence of preterm delivery.6

In women suffering from hypertrophic cardiomyopathy, delivery with beta-blocker protection is recommended. Newborns should be supervised for 24–48 h after delivery to exclude hypoglycaemia, bradycardia, and respiratory depression.

Diuretics should only be used if pulmonary congestion is present since they may decrease blood flow over the placenta.7 Furosemide and hydrochlorothiazide are most frequently used.

Aldosterone antagonists should be avoided.4 Spironolactone can be associated with antiandrogenic effects in the first trimester. Eplerenone is more specific for the mineralocorticoid receptor. The knowledge about effects on the human fetus is insufficient and its use is not recommended.

Digoxin may be used in pregnancy. Measurements of blood serum levels are subject to errors in pregnancy and are unlikely to be helpful.8

Women with pre-existing hypertension are advised to continue their current medication except for ACE inhibitors, angiotensin II antagonists, and direct renin inhibitors (see Chapter 44.7).9,10

Alpha-methyldopa is the drug of choice for long-term treatment of hypertension during pregnancy.11 No teratogenic effects have been documented and alpha-methyldopa has been well tolerated by the fetus.12 The alpha/beta blocker labetalol has comparable efficacy to methyldopa, but is not available in all countries in Europe. If beta blockers are used, metoprolol is recommended.

Calcium channel blockers such as nifedipine (orally) or isradipine (intravenously) are drugs of second choice for hypertension treatment.13

Urapidil is the drug of choice for hypertensive emergencies, where it is applied intravenously under continuous infusion.

Magnesium sulphate intravenously is the drug of choice for treatment of seizures and prevention of eclampsia.

Diuretics should be avoided for hypertension treatment because they may decrease blood flow over the placenta. They are not recommended in preeclampsia.

For drug dosing information we refer to the published European Society of Cardiology Guidelines on the management of patients with atrial fibrillation, supraventricular arrhythmias, ventricular arrhythmias, and heart failure.2,14,15,16

Vaughan Williams class I antiarrhythmic agents:

Flecainide appears to be relatively safe during pregnancy.17 It passes the placenta well, particularly during the third trimester, explaining the successful treatment of fetal arrhythmias by giving medication to the mother. Teratogenic effects have not been described. The experience with propafenone is limited, although no adverse effects to the fetus have been reported when taken during the third trimester.18

Adverse effects have been described for quinidine.19 Only a few reports are available on the use of lidocaine and mexiletine. Lidocaine is well tolerated by the mother and fetus, although it increases uterine tone and decreases blood flow in the placenta (Table 53.10.1). Less experience is available for mexiletine.20 Teratogenic effects have not been described with these drugs.

Procainamide is considered to be well tolerated and appears to be relatively safe for short-term therapy.21

Table 53.10.1
Cardiovascular drugs in pregnancy
DrugClassification (Vaughan Williams for antiarrhythmic agents)FDA categoryPlacenta permeableTransfer to breast milk (fetal dose)Adverse effects

Abciximab

Monoclonal antibody with antithrombotic effects

C

Unknown

Unknown

Inadequate human studies; should be given only if the potential benefit outweighs the potential risk to the fetus

Acenocoumarol

Vitamin K antagonist

X

Yes

Yes (no adverse effects reported)

Embryopathy (mainly 1st trim), bleeding

Acetylsalicylic acid (low dose)

Antiplatelet drug

B

Yes

Well tolerated

No teratogenic effects known

Adenosine

Antiarrhythmic

C

No

No

No fetal adverse effects reported (limited human data)

Aliskiren

Renin inhibitor

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Unknown

Amiodarone

Antiarrhythmic (class III)

D

Yes

Yes

Thyroid insufficiency (9%), hyperthyroidism, goitre, bradycardia, growth retardation, premature birth

Atenolol

β-blocker (class II)

D

Yes

Yes

Hypospadias (1st trim); birth defects, low birth weight, bradycardia and hypoglycaemia in fetus (2nd, 3rd trim)

Benazepril

ACE inhibitor

C (1st trim)/D (2nd,3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Bisoprolol

β-blocker (class II)

C

Yes

Yes

Bradycardia and hypoglycaemia in fetus

Candesartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown; not recommended

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Captopril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Clopidogrel

Antiplatelet drug

C

Unknown

Unknown

No information during pregnancy available

Colestipol

Lipid-lowering drug

C

Unknown

Yes—lowering fat-soluble vitamins

May impair absorption of fat-soluble vitamins, e.g. vitamin K → cerebral bleeding (neonatal)

Danaparoid

Anticoagulant

B

No

No

No side effects (limited human data)

Digoxin

Cardiac glycoside

C

Yes

Yesa

Diltiazem

Calcium channel blocker (class IV)

C

No

Yesa

Possible teratogenic effects

Disopyramide

Antiarrhythmic (class IA)

C

Yes

Yesa

Uterus contraction

Enalapril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Eplerenone

Aldosterone antagonist

C

Unknown

Unknown

Unknown

Fenofibrate

Lipid-lowering drugs

C

Yes

Yes—potentially carcinogenic

No adequate human data

Flecainide

Antiarrhythmic (class IC)

C

Yes

Yesa

Unknown

Fondaparinux

Anticoagulant

B

Yes (max 10%)

No

No side effects (limited human data)

Furosemide

Diuretic

C

Yes

Well tolerated; milk production can be reduced

Oligohydramnios

Gemfibrozil

Lipid-lowering drugs

B

Yes

Unknown

Structural brain anomalies, Pierre Robin syndrome

Glyceryl trinitrate

Nitrate

B

Unknown

Unknown

Bradycardia

Heparin (low molecular weight)

Anticoagulant

B

No

No

Long-term application: seldom osteoporosis and markedly less thrombocytopenia than unfractonated heparin

Heparin (unfractionated)

Anticoagulant

B

No

No

Long-term application: osteoporosis and thrombocytopenia

Hydralazine

Vasodilator

C

Yes

Yesa (1%)

Maternal side effect: lupus-like symptoms;

fetal tachyarrhythmias (maternal use)

Hydrochloro- thiazide

Diuretic

B

Yes

Yes; milk production can be reduced

Oligohydramnios

Irbesartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Isosorbide dinitrate

Nitrate

B

Unknown

Unknown

Bradycardia

Isradipine

Calcium channel blocker

C

Yes

Unknown

Potential synergism with magnesium sulphate may induce hypotension

Labetalol

α-blocker/β-blocker

C

Yes

Yesa

Intrauterine growth retardation (2nd, 3rd trim), neonatal bradycardia and hypotension (used near term)

Lidocaine

Antiarrhythmic (class IB)

C

Yes

Yesa

Fetal bradycardia, acidosis, central nervous system toxicity

Methyldopa

Central α-agonist

B

Yes

Yesa

Mild neonatal hypotension

Metoprolol

β-blocker (class II)

C

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Mexiletine

Antiarrhythmic (class IB)

C

Yes

Yesa

Fetal bradycardia

Nifedipine

Calcium channel blocker

C

Yes

Yesa (max 1.8%)

Tocolytic; sublingual application and potential synergism with magnesium sulphate may induce hypotension (mother) and fetal hypoxia

Phenprocoumon

Vitamin K antagonist

X

Yes

Yes (max 10%), well tolerated as inactive metabolite

Coumarin-embryopathy, bleeding

Procainamide

Antiarrhythmic (class IA)

C

Yes

Yes

Unknown

Propafenone

Antiarrhythmic (class IC)

C

Yes

Unknown

Unknown

Propranolol

β-blocker (class II)

C

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Quinidine

Antiarrhythmic (class IA)

C

Yes

Yesa

Thrombopenia, premature birth, VIIIth nerve toxicity

Ramipril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yes (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Sotalol

Antiarrhythmic (class III)

B

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Spironolactone

Aldosterone antagonist

D

Yes

Yes (1.2%); milk production can be reduced

Antiandrogenic effects, oral clefts (1st trim)

Statins, e.g. simvastatin, pravastatin, atorvastatin, fluvastatin

Lipid-lowering drugs

X

Yes

Unknown

Congenital anomalies

Ticlopidine

Antiplatelet

B

Unknown

Unknown

Unknown

Valsartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Verapamil

Calcium channel blocker (Class IV)

C

Yes

Yesa

Bradycardia, atrioventricular block, hypotension

Warfarin

Vitamin K antagonist

X

Yes

Yes (max 10%), well tolerated as inactive metabolite

Coumarin-embryopathy, bleeding

DrugClassification (Vaughan Williams for antiarrhythmic agents)FDA categoryPlacenta permeableTransfer to breast milk (fetal dose)Adverse effects

Abciximab

Monoclonal antibody with antithrombotic effects

C

Unknown

Unknown

Inadequate human studies; should be given only if the potential benefit outweighs the potential risk to the fetus

Acenocoumarol

Vitamin K antagonist

X

Yes

Yes (no adverse effects reported)

Embryopathy (mainly 1st trim), bleeding

Acetylsalicylic acid (low dose)

Antiplatelet drug

B

Yes

Well tolerated

No teratogenic effects known

Adenosine

Antiarrhythmic

C

No

No

No fetal adverse effects reported (limited human data)

Aliskiren

Renin inhibitor

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Unknown

Amiodarone

Antiarrhythmic (class III)

D

Yes

Yes

Thyroid insufficiency (9%), hyperthyroidism, goitre, bradycardia, growth retardation, premature birth

Atenolol

β-blocker (class II)

D

Yes

Yes

Hypospadias (1st trim); birth defects, low birth weight, bradycardia and hypoglycaemia in fetus (2nd, 3rd trim)

Benazepril

ACE inhibitor

C (1st trim)/D (2nd,3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Bisoprolol

β-blocker (class II)

C

Yes

Yes

Bradycardia and hypoglycaemia in fetus

Candesartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown; not recommended

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Captopril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Clopidogrel

Antiplatelet drug

C

Unknown

Unknown

No information during pregnancy available

Colestipol

Lipid-lowering drug

C

Unknown

Yes—lowering fat-soluble vitamins

May impair absorption of fat-soluble vitamins, e.g. vitamin K → cerebral bleeding (neonatal)

Danaparoid

Anticoagulant

B

No

No

No side effects (limited human data)

Digoxin

Cardiac glycoside

C

Yes

Yesa

Diltiazem

Calcium channel blocker (class IV)

C

No

Yesa

Possible teratogenic effects

Disopyramide

Antiarrhythmic (class IA)

C

Yes

Yesa

Uterus contraction

Enalapril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yesa (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Eplerenone

Aldosterone antagonist

C

Unknown

Unknown

Unknown

Fenofibrate

Lipid-lowering drugs

C

Yes

Yes—potentially carcinogenic

No adequate human data

Flecainide

Antiarrhythmic (class IC)

C

Yes

Yesa

Unknown

Fondaparinux

Anticoagulant

B

Yes (max 10%)

No

No side effects (limited human data)

Furosemide

Diuretic

C

Yes

Well tolerated; milk production can be reduced

Oligohydramnios

Gemfibrozil

Lipid-lowering drugs

B

Yes

Unknown

Structural brain anomalies, Pierre Robin syndrome

Glyceryl trinitrate

Nitrate

B

Unknown

Unknown

Bradycardia

Heparin (low molecular weight)

Anticoagulant

B

No

No

Long-term application: seldom osteoporosis and markedly less thrombocytopenia than unfractonated heparin

Heparin (unfractionated)

Anticoagulant

B

No

No

Long-term application: osteoporosis and thrombocytopenia

Hydralazine

Vasodilator

C

Yes

Yesa (1%)

Maternal side effect: lupus-like symptoms;

fetal tachyarrhythmias (maternal use)

Hydrochloro- thiazide

Diuretic

B

Yes

Yes; milk production can be reduced

Oligohydramnios

Irbesartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Isosorbide dinitrate

Nitrate

B

Unknown

Unknown

Bradycardia

Isradipine

Calcium channel blocker

C

Yes

Unknown

Potential synergism with magnesium sulphate may induce hypotension

Labetalol

α-blocker/β-blocker

C

Yes

Yesa

Intrauterine growth retardation (2nd, 3rd trim), neonatal bradycardia and hypotension (used near term)

Lidocaine

Antiarrhythmic (class IB)

C

Yes

Yesa

Fetal bradycardia, acidosis, central nervous system toxicity

Methyldopa

Central α-agonist

B

Yes

Yesa

Mild neonatal hypotension

Metoprolol

β-blocker (class II)

C

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Mexiletine

Antiarrhythmic (class IB)

C

Yes

Yesa

Fetal bradycardia

Nifedipine

Calcium channel blocker

C

Yes

Yesa (max 1.8%)

Tocolytic; sublingual application and potential synergism with magnesium sulphate may induce hypotension (mother) and fetal hypoxia

Phenprocoumon

Vitamin K antagonist

X

Yes

Yes (max 10%), well tolerated as inactive metabolite

Coumarin-embryopathy, bleeding

Procainamide

Antiarrhythmic (class IA)

C

Yes

Yes

Unknown

Propafenone

Antiarrhythmic (class IC)

C

Yes

Unknown

Unknown

Propranolol

β-blocker (class II)

C

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Quinidine

Antiarrhythmic (class IA)

C

Yes

Yesa

Thrombopenia, premature birth, VIIIth nerve toxicity

Ramipril

ACE inhibitor

C (1st trim)/D (2nd, 3rd trim)

Yes

Yes (max 1.6%)

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Sotalol

Antiarrhythmic (class III)

B

Yes

Yesa

Bradycardia and hypoglycaemia in fetus

Spironolactone

Aldosterone antagonist

D

Yes

Yes (1.2%); milk production can be reduced

Antiandrogenic effects, oral clefts (1st trim)

Statins, e.g. simvastatin, pravastatin, atorvastatin, fluvastatin

Lipid-lowering drugs

X

Yes

Unknown

Congenital anomalies

Ticlopidine

Antiplatelet

B

Unknown

Unknown

Unknown

Valsartan

Angiotensin II receptor blocker

C (1st trim)/D (2nd, 3rd trim)

Unknown

Unknown

Renal or tubular dysplasia, oligohydramnios, growth retardation, ossification disorders of skull, lung hypoplasia, contractures, large joints, anaemia, intrauterine fetal death

Verapamil

Calcium channel blocker (Class IV)

C

Yes

Yesa

Bradycardia, atrioventricular block, hypotension

Warfarin

Vitamin K antagonist

X

Yes

Yes (max 10%), well tolerated as inactive metabolite

Coumarin-embryopathy, bleeding

a

Breastfeeding is possible if the mother is treated with the drug.32

FDA, food and Drug Administration; trim, trimester.

Vaughan Williams class II antiarrhythmic agents:

Beta-blocking agents: oral medication with selective beta-blocking agents is generally considered to be safe.

Vaughan Williams class III antiarrhythmic agents:

Sotalol seems to be well tolerated during pregnancy22 and side effects are mainly related to its non-selective beta-blocking effects. Experience with sotalol during pregnancy is limited, however, so caution is still advised.

Amiodarone can have deleterious effects on the fetus.23 Hence, amiodarone, a category D agent, if given during the whole pregnancy, should be restricted to treating arrhythmias that are life-threatening or causing haemodynamic instability.23,24 There is no reported experience of dofetilide or dronedarone use during pregnancy. Dronedarone is assigned category X by the Food and Drug Administration and its use is considered contraindicated.

Vaughan Williams class IV antiarrhythmic agents:

Calcium antagonists: the use of verapamil intravenously may be associated with a greater risk of hypotension and subsequent fetal hypoperfusion. Oral verapamil is usually well tolerated, but there is limited experience during pregnancy. Beside hypotension of the mother and fetus, side effects affecting the fetus may include bradycardia, atrioventricular block, and decrease of myocardial contractility.

Multichannel blockers: there is no experience of use of vernakalant in pregnancies.

Others:

Digoxin: the experience with digoxin is extensive, and it is considered to be the safest antiarrhythmic drug during pregnancy.

Adenosine: significant side effects for mother and fetus have not been described, although most of the experiences with this drug were in the second and third trimesters.25

A formal indication for antiplatelet drugs in pregnant women is rare and hence the evidence regarding benefits and risks is scarce.26,27,28

Acetylsalicylic acid is used during pregnancy mainly to prevent preeclampsia, preterm death, and perinatal mortality in women at risk for these complications.26,29 No evidence of teratogenicity is observed in large trials.30,31

Thienopyridines have not been studied in pregnant women and should be avoided unless essential (as in percutaneous transluminal coronary angiography, see Chapter 5.7).

Unfractionated heparin and low-molecular weight heparin do not cross the placental barrier and do not cause embryopathy, but may lead to retroplacental bleeding. Both can be used during pregnancy if anticoagulation is necessary.

Phenprocoumon, warfarin, or other vitamin K antagonists are considered contraindicated in pregnancy by the manufacturer and are listed in the Food and Drug Administration category D, because of fetal risk of coumarin embryopathy and bleeding. Yet as stated for category D, the benefit from use in pregnant woman may be acceptable despite the risk.

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2008 Focused update incorporated into the ACC/AHA 2006 guidelines for the management of patients with valvular heart disease: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 1998 Guidelines for the Management of Patients With Valvular Heart Disease): endorsed by the Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, and Society of Thoracic Surgeons.
 
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