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Congenital Heart Disease

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Presentation on theme: "Congenital Heart Disease"— Presentation transcript:

1 Congenital Heart Disease

2 Incidence and Etiology
Incidence of 1% in general population. VSD is most common CHD TOF is most common cyanotic CHD TGA is most common cyanotic CHD presenting in infancy Etiology: Multifactorial inheritance 90%. Chromosomal 5% Single mutant gene 3% Environmental 2%

3 Presentations Asymptomatic heart murmer Cyanosis
Congestive heart failure Syncope Shock

4 CHD in Chromosomal Aberrations
Incidence Most common lesion Trisomy 21 50% VSD or A-V canal Trisomy % VSD Trisomy 13 90% VSD XO Turner 35% CoA

5 CHD in Single Mutant Gene Syndromes
Marfan’s Aortic aneurysm Noonan’s PS, ASD Williams’ Supravalvular AS Holt-Oram ASD, VSD NF PS, CoA

6 Teratogens and CHD Frequency Most common Alcohol 25-30% VSD
Phenytoin 2-3% PS,AS,CoA,PDA Lithium 10% Ebstein Rubella 35% PPS, PDA Diabetes 3-5% Hypertrophic septum TGA, VSD, CoA (Incidence can be as high as 30-50% in poorly controlled DM) Lupus 50% 3rd degree heart block PKU % TOF, VSD, ASD

7 Presentations Asymptomatic (heart murmur) Small VSD, ASD
Cyanosis D-TGA, TOF Congestive heart failure Large L-R shunt lesions Syncope AS, PS Shock Coarc, hypoplastic left heart

8 Birth 2w 8w 4m 1y 3-5y Adolescence VSD ASD| PDA CoA
AS HLHS TOF TriA/S PA TGA TA TAPVR CHF P. HTN P. HTN CHF Often asymptomatic Shock CHF/HTN Shock CHF CHF/syncope/murmur Shock Cyanosis CHF Shock/Cyanosis Shock/Cyanosis Cyanosis HLHS=Hypoplastic left heart syndrome TriA/S=Tricuspid atresia CHF=Congestive heart failure P.HTN=Pulmonary hypertension FTT=Failure to thrive Cyanosis/CHF Shock/Cyanosis

9 Cyanotic CHD 1. Truncus Arteriosus
2. Transposition of the Great Arteries 3. Tricuspid Atresia 4. Tetralogy of Fallot 5. Total Anomalous Pulmonary Venous Return Cyanosis occurs when blood hemoglobin saturation < 85%

10 Acyanotic CHD 1. VSD 2. ASD 3. PDA 4. Coarctation Aorta
5. Aortic Stenosis 6. Hypoplastic Left Heart

11 Cyanotic CHD with Decreased Pulmonary Blood Flow
1. Tetralogy of Fallot 2. Tricuspid Atresia 3. Total Anomalous Pulmonary Venous Return with obstruction These lesions must include both an obstruction to pulmonary blood flow (at the tricuspid valve or right ventricular or pulmonary valve level) and a pathway by which systemic venous blood can shunt from right to left and enter the systemic circulation (via a patent foramen ovale, atrial septal defect, or VSD). In these lesions, the degree of cyanosis depends on the degree of obstruction to the pulmonary blood flow. If the obstruction is mild, cyanosis may be absent at rest. These patients may acquire hypercyanotic (“tet”) spells during conditions of stress. In contrast, if the obstruction is severe, pulmonary blood flow may be dependent on the patency of the ductusarteriosus. When the ductus closes during the 1st few days of life, the neonate presents with profound hypoxemia and shock.

12 Cyanotic CHD with Increased Pulmonary Blood Flow
1. Transposition of the Great Arteries 2. Truncus Arteriosus 3. Total Anomalous Venous Return without obstruction

13 Acyanotic CHD with Increased Pulmonary Blood Flow (Volume Load)
1. ASD 2. VSD 3. PDA

14 Acyanotic CHD with Pulmonary Venous Congestion or Normal
Blood Flow (Pressure Load) 1. Coarctation Aorta 2. Aortic Stenosis 3. Hypoplastic Left Heart 4. Pulmonary Stenosis

15 Circulation before birth

16 Circulation after birth

17 Cyanotic CHD with Decreased Pulmonary Blood Flow
1. Tetralogy of Fallot 2. Tricuspid Atresia

18 Tetralogy of Fallot 1. VSD 2. Pulmonary artery stenosis
3. Overriding aorta 4. Right ventricular hypertrophy

19 Tetralogy of Fallot Incidence of total CHD Age at presentation
Clinical Auscultation Most common cyanotic CHD Usually by 6 months Cyanosis Cyanotic spells (squatting) Harsh systolic murmur Softer if worsening obstruction

20 Tetralogy of Fallot Radiology Decreased pulmonary vascularity
EKG Decreased pulmonary vascularity Boot-shaped heart R-sided aortic arch RAD, RAE, RVH

21 TOF treatment 1. For cyanotic spells: Knee-chest position
Morphine sulfate Vasoconstrictors Propranolol 2. Iron for anemia 3. Surgical a. Palliation Blalock-Taussig Waterston shunt Pott’s operation b. Corrective at 1-5 years of age

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23 Tetralogy of Fallot

24 Tetralogy of Fallot

25 Tricuspid Atresia Types 1. Normally related great arteries (69%)
With small VSD and PS (most common). Intact septum with pulmonary atresia Large VSD without PS 2. D-transposition of great arteries (28%) 3. L-transposition of great arteries (4%)

26 Tricuspid Atresia Incidence: Rare Age at presentation
Clinical No obstruction pulmonary blood flow Obstruction pulmonary blood flow Rare Infancy, depending on pulmonary blood flow Congestive heart failure Similar to VSD Cyanosis Variable More intense cyanosis as ductus closes

27 Tricuspid Atresia Auscultation: Systolic murmur with single S2
Radiology: Variable Decreased pulmonary vasculature

28 Treatment Tricuspid Atresia
1. PGE1 to keep ductus open 2. Balloon septostomy if no VSD 3. Surgical a. Palliation systemic-pulmonary shunt (PS) pulmonary artery banding (large VSD) b. Corrective Fontan

29

30 Cyanotic CHD with Increased Pulmonary Blood Flow
1. Truncus Arteriosus 2. Transposition of the Great Arteries 3. Total Anomalous Pulmonary Venous Return

31 Truncus Arteriosus Incidence Rare Age at presentation Neonatal
Clinical Auscultation Pulmonary vasculature EKG Rare Neonatal Cyanosis Signs of CHF Wide pule pressure and bounding arterial pulses Harsh systolic murmur Increased BVH or RVH

32 Truncus Arteriosus Associations Treatment Right sided aortic arch
Thymic aplasia - DiGeorge Syndrome Medical Pulmonary artery bending Rastelli’s operation

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34 Truncus Arteriosus

35 Transposition of the Great Vessels D-type
D-transposition, complete transposition, most common form -Aorta arises from the right ventricle. -Pulmonary artery arises from the left ventricle. -PDA is the only connection between systemic and pulmonary circulations, although VSD in 40%.

36 Transposition of the Great Vessels L-type
L-transposition, also called corrected transposition -Both ventricles and great vessels are transposed

37 D-TGA Incidence Age presentation Clinical Auscultation Radiology EKG
8% of all CHD Male:female 2:1 Newborn, when ductus closes Cyanosis within 1st 48 hrs if no VSD CHF when large left to right shunts Loud single S2, no murmur Egg-on-a-string heart Increased pulmonary vasculature, depending on size shunt RVH

38 Treatment for D-TGA 1. Prostaglandin E 2. Surgical
a. Atrial septostomy if no VSD (Rashkind, Blalock - Hanlon etc.) b. Anatomical correction (Jatene’s operation)

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40 TGA

41 TAPVR types 1. Supracardiac emptying in the left vertical
vein (most common type 80-90%) which subsequently drains into the SVC 2. Cardiac emptying into the coronary sinus or right atrium 3.Infradiaphragmatic emptying into vertical vein that descends through diaphragm into portal vein and or IVC

42 TAPVR Incidence Age at presentation Clinical findings EKG Radiology 2%
Newborn Rapid cyanosis in the infra-diaphragmatic type Non-obstructive similar to ASD plus mild cyanosis RVH “Snowman” configuration Diffuse reticular opacities Looks like HMD without air bronchograms!

43 TAPVR Associations Treatment Polysplenia
Asplenia (3/4 patients also TAPVR) Surgical ligation of anomalous vein

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45 Total anomalous venous return

46 Acyanotic CHD with Increased Pulmonary Blood Flow (left to right shunt lesions)
1. ASD 2. VSD 3. PDA

47 ASD Incidence Types Age presentation Clinical Auscultation EKG
Treatment 10% CHD Ostium secundum (most common) Sinus venosus defect Ostium primum (AV canal) Varies Mostly asymptomatic Slender body build Widely split and fixed S2! + SEM RAD and RVH No SBE coverage needed! Surgery for large shunts The paucity of symptoms in infants with ASDs is related to the structure of the right ventricle in early life when its muscular wall is thick and less compliant, thus limiting the left-to-right shunt. The SEM is produced by the increased flow across the right ventricular outflow tract into the pulmonary artery, not by low-pressure flow across the ASD.

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50 ASD

51 VSD Incidence Most common CHD (20%) Coexists with other lesions in 5%
Types Age presentation Most common CHD (20%) Coexists with other lesions in 5% Membranous (80%) Muscular (10%) Large - at age 2-3 months with congestive failure Small to moderate - usually asymptomatic

52 VSD Congestive heart failure if large Clinical Poor weight gain
Systolic thrill with holosystolic murmur at LLSB Diastolic murmur with large shunts and loud P2 with pulmonary hypertension Diastolic rumble at apex indicates CHF Clinical Auscultation

53 VSD EKG 1. normal if small VSD 2. LAE-LVH if moderate
Radiology Associations Complications 1. normal if small VSD 2. LAE-LVH if moderate 3. LAE-BVH if large 4. RVH-PVOD Increased vascularity with larger shunts and enlargement cardiac size Holt-Oram syndrome, Down’s, Trisomy 13, Trisomy 18 Eisenmenger’s Syndrome (shunt reverses to rightleft)

54 Treatment VSD 1. Spontaneous closure of small VSD’s
2. Medical therapy (diuretics, digitalis) 3. Pulmonary artery banding 4. Surgical placement of patch over VSD 5. SBE prophylaxis A significant number (30-50%) of small defects close spontaneously, most frequently during the 1st 2 years of life. Small muscular VSDs are more likely to clse than membranous VSDs. The vast majority of defects that close do so before age 4 yr. An isolated, small, hemodynamically insignificant VSD is not an indication for surgery currently. These patients do require SBE prophylaxis. In infants with a large VS, medical management has two aims: to control heart failure and to prevent the development of pulmonary vascular disease. Because surgical closure can be carried out at low risk in most infants, medical management should not be pursued in symptomatic infants after an initial unsuccessful trial. Pulmonary vascular disease can be prevented when surgery is performed within the 1st year of life.

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56 VSD

57 PDA Clinical Premature infants - Congestive heart failure
Term infants - usually asymp murmur Pulm. Vasculature Increased Radiology Dependent on size of shunt Left atrial enlargement often present Massive bulge at left upper mediastinum in large shunts Treatment Premature infants - Indomethacin Ligation and division of the ductus Prostaglandin E infusion maintains ductal patency when needed

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59 PDA

60 Acyanotic CHD with Pulmonary Venous Congestion or Normal
Blood Flow (Pressure Load) 1. Coarctation Aorta 2. Aortic Stenosis 3. Hypoplastic Left Heart 4. Pulmonary Stenosis

61 Coarctation of the Aorta
Incidence: 5% of CHD Clinical: Preductal or infantile type presents in young child with CHF and  LE pulses Adult type presents with hypertension and difference in arm and leg pulses Radiology: Rib notching - starts age 6-8 Associations : Often isolated Turner’s, NF, William’s, Sturge-Weber Treatment: Primary repair Prostaglandin E to infants

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64 Rib notching

65 Aortic Stenosis Clinical: Most asymptomatic Angina
Syncope - may be fatal Pulm. Vasc.: Normal Associations: Williams’ Syndrome Treatment: Medical Surgical No high impact sports

66 Hypoplastic Left Heart
Incidence: 8% of all CHD, most common cause for early cardiac death Age at present.: Immediately at birth or first weeks Clinical: 1st presentation is usually not cyanosis, but signs of shock Pulm. Vasc.: Increased Radiology: Large cardiac silhouette Treatment: Prostaglandin E Norwood procedure (high mortality)

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68 Mitral Valve Prolapse Facts
More common in girls  May be inherited as autosomal dominant trait with variable expression  Common in Marfan’s  Dominant signs are ausculatory; late systolic apical murmur preceded by a click  PVC’s may be a complication  Non progressive in children  Endocarditis prophylaxis indicated only in substantiated cases, usually those with mitral insufficiencies

69 Blalock-Taussig shunt. The subclavian artery is transected
and anastomosed in a end-to-side fashion to the ipsilateral pulmonary artery. Usually the subclavian artery opposite to the arch is used.

70 The Modified Blalock-Taussig shunt now uses a Goretex
graft (green) to connect the subclavian artery to the pulmonary artery. This preserves the subclavian artery.

71 Potts shunt is where a side-to-side anastomosis is made between the
descending aorta and the pulmonary artery.

72 The Waterston-Cooley shunt is similar to the Potts shunt. A side to
side anastomosis or window is created between the pulmonary artery and the ascending aorta. The difference is that it is the ascending aorta (Waterston-Cooley) rather than the descending aorta which is anastomosed to the pulmonary artery (Potts).

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75 Pearls Bounding pulses; think PDA or AV fistula.
Widely fixed split second heart tone; think ASD. No pre- and postductal saturation differences when there is total mixing of deoxygenated venous blood with oxygenated pulmonary blood in the heart; such as -total anomalous pulmonary venous return truncus arteriosus

76 Pearls Pre- and post-ductal saturation differences
post-ductal saturation is higher in TGA all other congenital heart anomalies without total mixing in the heart have a lower post-ductal saturation


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