Cardiovascular System - Abnormalities

Introduction

Data shown as a percentage of all major abnormalities based upon published statistics using the same groupings as Congenital Malformations Australia 1981-1992 P. Lancaster and E. Pedisich ISSN 1321-8352.

Heart defects and preterm birth are the most common causes of neonatal and infant death. The long-term development of the heart combined with extensive remodelling and post-natal changes in circulation lead to an abundance of abnormalities associated with this system.

A UK study literature showed that preterm infants have more than twice as many cardiovascular malformations (5.1 / 1000 term infants and 12.5 / 1000 preterm infants) as do infants born at term and that 16% of all infants with cardiovascular malformations are preterm. (0.4% of live births occur at greater than 28 weeks of gestation, 0.9% at 28 to 31 weeks, and 6% at 32 to 36 weeks. Overall, 7.3% of live-born infants are preterm)

"Baltimore-Washington Infant Study data on live-born cases and controls (1981-1989) was reanalyzed for potential environmental and genetic risk-factor associations in complete atrioventricular septal defects AVSD (n = 213), with separate comparisons to the atrial (n = 75) and the ventricular (n = 32) forms of partial AVSD. ...Maternal diabetes constituted a potentially preventable risk factor for the most severe, complete form of AVSD."

In addition, there are in several congenital abnormalities that exist in adults (bicuspid aortic valve, mitral valve prolapse, and partial anomalous pulmonary venous connection) which may not be clinically recognized.

Some Recent Findings

Spontaneous Closure of Muscular Trabecular Ventricular Septal Defect: Comparison of Defect Positions "We performed a historical cohort study for which 150 patients <3 months of age (median age, 9 days) diagnosed as having a muscular trabecular VSD were selected. ...We infer that midventricular muscular trabecular VSD tends to close spontaneously earlier and more frequently than either anterior or apical muscular trabecular VSD."

Heart Abnormalities

Ventricular Septal Defect

The Ventricular Septal Defect (VSD) usually occurs in the membranous (perimembranous) rather than muscular interventricular septum, and is more frequent in males that females. Perimembranous defects are located close to the aortic and tricuspid valves and adjacent to atrioventricular conduction bundle. Links: Ventricular Septal Defects | Search PubMed

Atrial Septal Defects

Atrial Septal Defects (ASD) are a group of common (1% of cardiac) congenital anomolies defects occuring in a number of different forms and more often in females. patent foramen ovale- allows a continuation of the atrial shunting of blood, in 25% of people a probe patent foramen ovale (allowing a probe to bepassed from one atria to the other) exists. ostium secundum defect endocardial cushion defect involving ostium primum sinus venosus defect - contributes about 10% of all ASDs and occurs mainly in a common and less common form. Common ("usual type") - in upper atrial septum which is contiguous with the superior vena cava. Less common - at junction of the right atrium and inferior vena cava. common atrium Treatment: The surgical repair requires a cardiopulmonary bypass and is recommended in most cases of ostium secundum ASD, even though there is a significant risk involved. Ostium primum defects tend to present earlier and are often associated with endocardial cushion defects and defective mitral or tricuspid valves. In such cases, valve replacement may be necessary and the extended operation has a considerable chance of mortality. Increasingly closure by a transcatheter device closure has been applied. Repair of atrial septal defects on the perfused beating heart (atrial septal defect size 2 cm - 4.5 cm) Links: Atrial Septal Defects | OMIM: Atrial Septal Defect | Search PubMed | Medline Plus - ASD Repair Video

Patent Ductus Arteriosus

Patent ductus arteriosus (PDA), or Patent arterial duct (PAD), occurs commonly in preterm infants, and at approximately 1 in 2000 full term infants and more common in females (to male ratio is 2:1). Can also be associated with specific genetic defects, trisomy 21 and trisomy 18, and the Rubinstein-Taybi and CHARGE syndromes. The opening is asymptomatic when the duct is small and can close spontaneously (by day three in 60% of normal term neonates), the remainder are ligated simply and with little risk, with transcatheter closure of the duct generally indicated in older children. The operation is always recommended even in the absence of cardiac failure and can often be deferred until early childhood. Patent ductus arteriosus classification PDA echocardiogram PDA angiogram Links: Patent Ductus Arteriosus |Search PubMed

Tetralogy of Fallot

Named after Etienne-Louis Arthur Fallot (1888) who described it as "la maladie blue" and is a common developmental cardiac defect. The syndrome consists of a number of a number of cardiac defects possibly stemming from abnormal neural crest migration.

ICD-10 Code: Q21.3 Tetralogy of Fallot Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.

Links: Gene expression in cardiac tissues from infants with idiopathic conotruncal defects | Search PubMed

Hypoplastic Left Heart

Characterized by hypoplasia (underdevelopment or absence) of the left ventricle obstructive valvular and vascular lesion of the left side of the heart. Links: Search PubMed

Double Outlet Right Ventricle

De-oxygenated blood enters the aorta from the right ventricle and is returned to the body.

Links: Search PubMed

Tricuspid Atresia

Blood is shunted through an atrial septal defect to the left atrium and through the ventricular septal defect to the pulmonary artery. The shaded arrows indicate mixing of the blood. Fontan Procedure: a surgical procedure developed by Fontan and Baudet (1971) to restore a circulation in patients with tricuspid atresia. Links: Search PubMed | Fontan procedure

Dextrocardia

Dextrocardia anatomical heart position	Dextrocardia (postnatal 1 year old)

Initial malrotation of the heart tube bending left instead of right. Results in heart and greater vessels reversed. Can also occur with situs invertus, where viscera are transposed LR.

Anatomical left-right normal asymmetry is called situs solitus. The alternative heterotaxy can be either randomization (situs ambiguus) or a complete reversal (situs inversus) of normal organ position.

Links: Chicken Abnormal Heart Movie | Search PubMed

Abnormalities of Conducting System

Also variously called the cardiac conduction system (CCS), cardiac pacemaking and conduction system (CPCS), or atrioventricular conduction system (AVCS). Recently animal models (CCS-lacZ transgenic mouse) have helped identify key processes in the development of this specialized conduction system.

"Known arrhythmogenic areas including Bachmann's bundle, the pulmonary veins, and sinus venosus derived internodal structures, demonstrate lacZ expression." (Jongbloed et al, 2004)

Long QT Syndrome

Congenital long QT syndrome (LQTS) is a group of rare genetic disorders with prolonged ventricular repolarization and a risk of ventricular tachyarrhythmias. Cause is mutations in genes encoding either cardiac ion channels or channel interacting proteins.

Search NCBI Bookshelf: Congenital long-QT syndrome

Links: Search PubMed

Heart Vessel Abnormalities

Transposition of the Great Vessels

Characterized by aorta arising from right ventricle and pulmonary artery from the left ventricle and often associated with other cardiac abnormalities (e.g. ventricular septal defect). International Classification of Diseases code 745.1 Australian national rate (1982-1992) 3.6/10,000 births. Of 988 infants 4.1% were stillborn and 23.2% liveborn died during neonatal period. slightly more common in twin births than singleton. Congenital Malformations Australia 1981-1992 P. Lancaster and E. Pedisich ISSN 1321-8352 Neonates with transposed great arteries die without an arterial switch operation, first carried out in 1975. LInks: Transposition of the Great Vessels | Search PubMed | PMID 15987628 | PMID 18851735

Coarctation of the Aorta

5-8% of Congenital Heart Disease Aortic constriction. Treatment aims at maintaining the ductus arteriosus via prostaglandins and by surgical intervention. Recent review suggests it may: affect the aortic arch in a highly variable manner be associated with a host of other left sided heart lesions represent a wider vasculopathy within the pre-coarctation arterial tree LInks: Search PubMed | PMID 21947983 | 2011 Review PDF

Interrupted Aortic Arch

LInks: Search PubMed

Pulmonary Atresia

Abnormal blood flow (as indicated by the shaded blue arrow) is from the right atrium and right ventricle through an atrial septal defect to the left side of the heart. Blood can reach the pulmonary arteries only through a patent ductus arteriosus. 10% of Congenital Heart Disease Unequal division of trunks causes cusps to fuse to form a dome with a narrow/non-existent lumen. Heart-lung transplantation may be the only therapy. LInks: Search PubMed

Total Anomalous Pulmonary Venous Connection

Total Anomalous Pulmonary Venous Connection (TAPVC) or Total Anomalous Pulmonary Venous Return (TAPVR) occurs when pulmonary veins connect to the right atrium (RA) and not the left atrium (LA). This abnormal connection returns oxygenated pulmonary blood from the lungs back to the right atrium or a vein flowing into the right atrium. < 4% of Congenital Heart Disease more common in females Total or partial lack of connection of the pulmonary veins with LA. They open into RA, one of the systemic veins or both. The overloaded pulmonary circuit leads to cyanosis, tachypnoea and dyspnoea. Treatment is via surgical redirection LInks: Search PubMed

Complete atrioventricular canal

LInks: Search PubMed

Partial Anomalous Pulmonary Venous Drainage

< 4% of Congenital Heart Disease more common in females Total or partial lack of connection of the pulmonary veins with left atria (LA). They open into right atria (RA), one of the systemic veins or both. The overloaded pulmonary circuit leads to cyanosis, tachypnoea and dyspnoea. Treatment is via surgical redirection LInks: Search PubMed | PMID 22119121 | PMID 12652510

Aortic Stenosis

7% of Congenital Heart Disease Persistence of tissue that normally degenerates. Results in left ventricle hypertrophy, heart murmurs. LInks: Search PubMed

Pulmonary Stenosis

10% of Congenital Heart Disease Unequal division of trunks causes cusps to fuse to form a dome with a narrow/non-existent lumen. Heart-lung transplantation may be the only therapy. LInks: Search PubMed

International Classification of Diseases

The International Classification of Diseases (ICD) World Health Organization's classification used worldwide as the standard diagnostic tool for epidemiology, health management and clinical purposes. This includes the analysis of the general health situation of population groups. It is used to monitor the incidence and prevalence of diseases and other health problems. Within this classification "congenital malformations, deformations and chromosomal abnormalities" are (Q00-Q99) but excludes "inborn errors of metabolism" (E70-E90).

Congenital malformations of the circulatory system (Q20-Q28)

Q20 Congenital malformations of cardiac chambers and connections

Excl.: dextrocardia with situs inversus (Q89.3) mirror-image atrial arrangement with situs inversus (Q89.3)

• Q20.0 Common arterial trunk Persistent truncus arteriosus
• Q20.1 Double outlet right ventricle Taussig-Bing syndrome
• Q20.2 Double outlet left ventricle
• Q20.3 Discordant ventriculoarterial connection Dextrotransposition of aorta Transposition of great vessels (complete)
• Q20.4 Double inlet ventricle Common ventricle Cor triloculare biatriatum Single ventricle
• Q20.5 Discordant atrioventricular connection Corrected transposition Laevotransposition Ventricular inversion
• Q20.6 Isomerism of atrial appendages Isomerism of atrial appendages with asplenia or polysplenia
• Q20.8 Other congenital malformations of cardiac chambers and connections
• Q20.9 Congenital malformation of cardiac chambers and connections, unspecified

Q21 Congenital malformations of cardiac septa

Excl.: acquired cardiac septal defect (I51.0)

• Q21.0 Ventricular septal defect
• Q21.1 Atrial septal defect Coronary sinus defect Patent or persistent: foramen ovale ostium secundum defect (type II) Sinus venosus defect
• Q21.2 Atrioventricular septal defect Common atrioventricular canal Endocardial cushion defect Ostium primum atrial septal defect (type I)
• Q21.3 Tetralogy of Fallot Ventricular septal defect with pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.
• Q21.4 Aortopulmonary septal defect Aortic septal defect Aortopulmonary window
• Q21.8 Other congenital malformations of cardiac septa Eisenmenger's defect Pentalogy of Fallot Excl.: Eisenmenger's complex (I27.8) syndrome (I27.8)
• Q21.9 Congenital malformation of cardiac septum, unspecified Septal (heart) defect NOS

Q22 Congenital malformations of pulmonary and tricuspid valves

• Q22.0 Pulmonary valve atresia
• Q22.1 Congenital pulmonary valve stenosis
• Q22.2 Congenital pulmonary valve insufficiency Congenital pulmonary valve regurgitation
• Q22.3 Other congenital malformations of pulmonary valve Congenital malformation of pulmonary valve NOS
• Q22.4 Congenital tricuspid stenosis Tricuspid atresia
• Q22.5 Ebstein's anomaly
• Q22.6 Hypoplastic right heart syndrome
• Q22.8 Other congenital malformations of tricuspid valve
• Q22.9 Congenital malformation of tricuspid valve, unspecified

Q23 Congenital malformations of aortic and mitral valves

• Q23.0 Congenital stenosis of aortic valve Congenital aortic: atresia stenosis Excl.: congenital subaortic stenosis (Q24.4) that in hypoplastic left heart syndrome (Q23.4)
• Q23.1 Congenital insufficiency of aortic valve Bicuspid aortic valve Congenital aortic insufficiency
• Q23.2 Congenital mitral stenosis Congenital mitral atresia
• Q23.3 Congenital mitral insufficiency
• Q23.4 Hypoplastic left heart syndrome Atresia, or marked hypoplasia of aortic orifice or valve, with hypoplasia of ascending aorta and defective develop-ment of left ventricle (with mitral valve stenosis or atresia).
• Q23.8 Other congenital malformations of aortic and mitral valves
• Q23.9 Congenital malformation of aortic and mitral valves, unspecified

Q24 Other congenital malformations of heart

Excl.: endocardial fibroelastosis (I42.4)

• Q24.0 Dextrocardia Excl.: dextrocardia with situs inversus (Q89.3) isomerism of atrial appendages (with asplenia or polysplenia) (Q20.6) mirror-image atrial arrangement with situs inversus (Q89.3)
• Q24.1 Laevocardia Location of heart in left hemithorax with apex pointing to the left, but with situs inversus of other viscera and defects of the heart, or corrected transposition of great vessels.
• Q24.2 Cor triatriatum
• Q24.3 Pulmonary infundibular stenosis
• Q24.4 Congenital subaortic stenosis
• Q24.5 Malformation of coronary vessels Congenital coronary (artery) aneurysm
• Q24.6 Congenital heart block
• Q24.8 Other specified congenital malformations of heart Congenital: diverticulum of left ventricle malformation of: myocardium pericardium Malposition of heart Uhl's disease
• Q24.9 Congenital malformation of heart, unspecified Congenital: anomaly disease NOS of heart

Q25 Congenital malformations of great arteries

• Q25.0 Patent ductus arteriosus Patent ductus Botallo Persistent ductus arteriosus
• Q25.1 Coarctation of aorta Coarctation of aorta (preductal)(postductal)
• Q25.2 Atresia of aorta
• Q25.3 Stenosis of aorta Supravalvular aortic stenosis Excl.: congenital aortic stenosis (Q23.0)
• Q25.4 Other congenital malformations of aorta Absence Aplasia Congenital: aneurysm dilatation of aorta Aneurysm of sinus of Valsalva (ruptured) Double aortic arch [vascular ring of aorta] Hypoplasia of aorta Persistent: convolutions of aortic arch right aortic arch Excl.: hypoplasia of aorta in hypoplastic left heart syndrome (Q23.4)
• Q25.5 Atresia of pulmonary artery
• Q25.6 Stenosis of pulmonary artery Supravalvular pulmonary stenosis
• Q25.7 Other congenital malformations of pulmonary artery Aberrant pulmonary artery Agenesis Aneurysm, congenital Anomaly Hypoplasia of pulmonary artery Pulmonary arteriovenous aneurysm
• Q25.8 Other congenital malformations of great arteries
• Q25.9 Congenital malformation of great arteries, unspecified

Q26 Congenital malformations of great veins

• Q26.0 Congenital stenosis of vena cava Congenital stenosis of vena cava (inferior)(superior)
• Q26.1 Persistent left superior vena cava
• Q26.2 Total anomalous pulmonary venous connection
• Q26.3 Partial anomalous pulmonary venous connection
• Q26.4 Anomalous pulmonary venous connection, unspecified
• Q26.5 Anomalous portal venous connection
• Q26.6 Portal vein-hepatic artery fistula
• Q26.8 Other congenital malformations of great veins Absence of vena cava (inferior)(superior) Azygos continuation of inferior vena cava Persistent left posterior cardinal vein Scimitar syndrome
• Q26.9 Congenital malformation of great vein, unspecified Anomaly of vena cava (inferior)(superior) NOS

Q27 Other congenital malformations of peripheral vascular system

Excl.: anomalies of: cerebral and precerebral vessels (Q28.0-Q28.3) coronary vessels (Q24.5) pulmonary artery (Q25.5-Q25.7) congenital retinal aneurysm (Q14.1) haemangioma and lymphangioma (D18.-)

• Q27.0 Congenital absence and hypoplasia of umbilical artery Single umbilical artery
• Q27.1 Congenital renal artery stenosis
• Q27.2 Other congenital malformations of renal artery Congenital malformation of renal artery NOS Multiple renal arteries
• Q27.3 Peripheral arteriovenous malformation Arteriovenous aneurysm Excl.: ac
• Quired arteriovenous aneurysm (I77.0)
• Q27.4 Congenital phlebectasia
• Q27.8 Other specified congenital malformations of peripheral vascular system Aberrant subclavian artery Absence Atresia of artery or vein NEC Congenital: aneurysm (peripheral) stricture, artery varix
• Q27.9 Congenital malformation of peripheral vascular system, unspecified Anomaly of artery or vein NOS

Q28 Other congenital malformations of circulatory system

Excl.: congenital aneurysm: NOS (Q27.8) coronary (Q24.5) peripheral (Q27.8) pulmonary (Q25.7) retinal (Q14.1) ruptured: cerebral arteriovenous malformation (I60.8) malformation of precerebral vessels (I72.-)

• Q28.0 Arteriovenous malformation of precerebral vessels Congenital arteriovenous precerebral aneurysm (nonruptured)
• Q28.1 Other malformations of precerebral vessels Congenital: malformation of precerebral vessels NOS precerebral aneurysm (nonruptured)
• Q28.2 Arteriovenous malformation of cerebral vessels Arteriovenous malformation of brain NOS Congenital arteriovenous cerebral aneurysm (nonruptured)
• Q28.3 Other malformations of cerebral vessels Congenital: cerebral aneurysm (nonruptured) malformation of cerebral vessels NOS
• Q28.8 Other specified congenital malformations of circulatory system Congenital aneurysm, specified site NEC
• Q28.9 Congenital malformation of circulatory system, unspecified

Chapter XVI Certain conditions originating in the perinatal period (P00-P96)

P29 Cardiovascular disorders originating in the perinatal period

Excl.: congenital malformations of the circulatory system (Q20-Q28)

• P29.0 Neonatal cardiac failure
• P29.1 Neonatal cardiac dysrhythmia
• P29.2 Neonatal hypertension
• P29.3 Persistent fetal circulation Delayed closure of ductus arteriosus Pulmonary hypertension of newborn (persistent)
• P29.4 Transient myocardial ischaemia of newborn
• P29.8 Other cardiovascular disorders originating in the perinatal period
• P29.9 Cardiovascular disorder originating in the perinatal period, unspecified

ICD-10 | Neonatal Development

References

Articles

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Cite this page: Hill, M.A. (2024, April 30) Embryology Cardiovascular System - Abnormalities. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Cardiovascular_System_-_Abnormalities

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