Approach to child with heart disease

Pushpa Raj Sharma Professor of Child Health Institute of Medicine

Diseases of heart

Blood vessels Endocardium Myocardium Pericardium

Prevalence

  

Congenital Cyanotic: 22% Acyanotic: 68%

  VSD ASD 25% 6% 

Acquired

 Kawasaki disease    Rheumatic Tubercular Collagen   PDA TOF 6% 5%  PS 5%  AS 5% Ceylon Med J 2001 Sep; 46 (3): 96-8; Indian J Pediatr. 2001 Aug;68 (8):757-7 Nelson’s Textbook of pediatrics; 17 ed.

Common acyanotic lesions

         

Ventricular septal defects Atrial septal defects Atrio-ventricular septal defects Patent ductus arteriosus Truncus arteriosus Pulmonary stenosis Aortic stenosis Mitral stenosis/incompetence Coarctation of aorta Tricuspid regurgitation

Common Cyanotic Lesions

Decreased flow 1. Tetralogy of Fallot 2. Tricuspid Atresia 3. Severe Pulmonic Stenosis 4. Ebstein’s anamoly Increased Flow 5. Transposition of great vessles 6. VSD with pulmonary atresia

Common Lesions producing cyanosis

7. Truncus Arteriosus 8. Hypoplastic left heart 9. Single ventricle

10

. TAPVR with infradiaphragmatic obstruction

         Presenting complaints/signs  Fast breathing Failure to thrive  Oedema Exercise intolerence  Hepatomegaly, Easy fatigability  spleenomegaly Chest indrawing  Clubbing Bluish spells Fever with rigor Palpitation Convulsion    Cyanosis Focal neurological lesion Other organ defects Chromosomal anomalies

Cyanosis: is it a cardiac cause or lung cause  Hyperoxia test  Neonates with cyanotic congenital heart disease usually do not have significantly raised arterial Pao2 during administration of 100% oxygen.

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Ventricular Defect

Small VSD

  Asymptomatic A loud, harsh, or blowing holosystolic murmur.

Large VSD

 dyspnea, feeding difficulties, poor growth, profuse perspiration, recurrent pulmonary infections, and cardiac failure in early infancy. Syndromes associated with this condition 80%

VSD

: ECG is normal but may show right ventricular hypertrophy, if present indicates defect is large and presence of pulmonary hypertension or pulmonry stenosis

Ventricular Septal Defect (VSD) Small VSDs, the chest radiograph is usually normal Large VSD

: The presence of right ventricular hypertrophy, olegeimic lung fields (pulmonary hypertension or an associated pulmonic stenosis), gross cardiomegaly with prominence of both ventricles, the left atrium.

    Ventricular Septal defects 30–50% of small defects close spontaneously, most frequently during the 1st 2 yr of life.

Small muscular VSDs are more likely to close (up to 80%) than membranous VSDs are (up to 35%). infants with large defects have repeated episodes of respiratory infection and heart failure despite optimal medical management. Surgical repair prior to development of an irreversible increase in pulmonary vasculalr resistance (usually prior to the patient's second birthday).

Atrial Septal Defects: secundum

    Most common form of ASD (fossa ovalis) In large defects, a considerable shunt of oxygenated blood flows from the left to the right atrium.

Mostly asymptomatic The 2nd heart sound is characteristically widely split and fixed.

Secundum

  

Atrial Septal Defects:primum

Situated in the lower portion of the atrial septum and overlies the mitral and tricuspid valves. In most instances, a cleft in the anterior leaflet of the mitral valve is also noted.

Combination of a left-to right shunt across the atrial defect and mitral insufficiency C/F similar to that of an ostium secundum ASD

Atrial Septal Defect

    Enlargement of the right ventricle Enlargement of atrium Large pulmonary artery increased pulmonary vascularity is.

The

electrocardiogram

in patients with a complete AV septal defect is distinctive. The principal abnormalities are (1) superior orientation of the mean frontal QRS axis with left axis deviation to the left upper or right upper quadrant, (2) counterclockwise inscription of the superiorly oriented QRS vector loop, (3) signs of biventricular hypertrophy or isolated right ventricular hypertrophy, (4) right ventricular conduction delay (RSR′ pattern in leads V3 R and V1 ), (5) normal or tall P waves, and (6) occasional prolongation of the P-R interval

   

Atrial Septal Defects

Secundum ASDs are well tolerated during childhood.

Antibiotic prophylaxis for isolated secundum ASDs is not recommended.

Surgery or transcatheter device closure is advised for all symptomatic patients and also for asymptomatic patients with a Qp:Qs ratio of at least 2:1. Ostium primum defects are approached surgically

Patent Ductus Arteriosus

  Small defect no symptoms.

Large defect:  Wide pulse pressure     Enlarged heart Thrill in L second IS Continuous murmur X-ray: prominent pulmonary artery with increased vascular markings.

Primary Pulmonary Hypertension

     Prominent pulmonary artery.

Prominent right ventricle Prominent vascularity in the hilar areas Decreased vascualr marking in the periphery.

No treatment

Mitral insufficiency: Rheumatic

High volume load Inflammatory process Enlarged left ventricles Dilatation of the left atrium Pulmonary congestion Spontaneous improvement

Symptoms of left sided failure Repeated insult

Chronic mitral insufficiency

Symptoms of right heart failure

Raised Pulmonary AP Enlarged right ventricle and atrium

Mitral insufficiency: Rheumatic

     Signs of heart failure Heaving apical impulse Apical systolic thrill Accentuated 2 nd sound Holosystolic murmur radiating to axilla   ECG: bifid P waves and left ventricular hyertrophy X-ray: prominent left atrium and ventricle (straight left border)

Prophylaxis against recurrence of rheumatic fever

       Rheumatic valvular disease: Mitral stenosis Takes 10 years to develop Symptoms proportionate to severity Left ventricular failure right ventricular failure Loud first heart sound with opening snap.

Diastolic murmur Absent murmur if heart failure.

Surgical intervention if symptomatic

Mitral Stenosis

      Loud 1 st sound Diastolic murmur left atrial enlargement prominence of the pulmonary artery enlarged right-sided heart chambers; ECG: prominent notched P wave.

Pericardial Effusion

 Presenting complaint    Precordial pain Cough Dyspnoea     Abdominal pain Vomiting Fever Other organs involvement  Signs:    Position: leaning forward.

Puffy face Friction rub      Absent apical impulse Muffled heart sounds Pulsus paradoxus Distended neck veins Low QRS complex, T inversion

Pericardial Effusion

 A relatively large pericardial effusion must be present to cause an enlarged cardiac shadow with the usual “water bottle” configuration on a chest roentgenogram

The test that differentiates

The cardiac seize and the vascularity in the chest X-ray

Cardiac disease with normal/decreased vasculature         Viral myocarditis Tetralogy of Fallot Pulmonary atresia Tricuspid atresia Endocardial fibroelastosis Aberrant left coronary artery Cystic medial necrosis Diabetic mother

Tetralogy of Fallot

    Ventricular septal defect Pulmonic stenosis Overriding aorta Right ventricular hypertrophy

Cyanotic

Cardiac disease with increased vasculature        Atrioventricular septal defects Congestive cardiac failure Transposition of great arteries with VSD Total anomalous pulmonary venous drainage Truncus arteriosus Single ventricle without pulmonary stenosis Hypoplastic left heart syndrome

Congestive Cardiac Failure

  Enlarged heart Plethoric lung fields specially at bases