Paediatrics Flashcards
Neonatal Cardiovascular Physiology
Changes in fetal circulation before delivery (6)
Umbilical vein: transports blood from placenta to fetus
Ductus venosus: connects umbilical vein to IVC
Foramen ovale: blood flows through from right atrium to left atrium
Ductus arteriosus: a smaller volume of blood goes from right atrium to right ventricle and into the pulmonary artery, the ductus arteriosus is a channel between pulmonary artery and aortic arch to allow blood to bypass lungs
Lungs: no respiratory function; filled with amniotic fluid, alveoli are small, arterioles + venules are contracted
Umbilical arteries (2): come off left and right iliac arteries and take blood back to placenta
Neonatal Cardiovascular Physiology
Changes in fetal circulation after delivery (4)
Lungs: as body passes through birth canal, amniotic fluid is squeezed out of lungs, alveoli become larger, vessels relax and vascular pressure stops to allow more blood to lungs
Ductus venosus: fibroses to become hepatic ligamentum teres
Foramen ovale: closes (if stays open, oxygenated blood flows from left -> right atrium)
Ductus arteriosus: functional closure at days 2-3 and anatomical closure by fibrosis at days 10-14 (if stayed open, blood would flow from aorta to pulmonary artery)
Innocent Murmurs
Proportion of murmurs (1)
70-80%
Innocent Murmurs
Types (4)
Still’s murmur
Pulmonary outflow murmur
Carotid/brachiocephalic arterial bruits
Venous hum
Innocent Murmurs Common features (5)
Sysotlic murmur (except venous hum which is continuous)
No other signs of cardiac disease
Soft murmurs, grade 1/6 or 2/6
Vibratory, musical
Varies with position, respiration, exercise
Innocent Murmurs
Still’s Murmur (4)
Most common
LV outflow murmur
Soft systolic murmur
Heard at apex- left sternal border
Innocent Murmurs
Chromosomal causes of congenital heart disease (4)
Trisomy 18 (Edwards syndrome)- VSD + ASD
Trisomy 21 (Downs syndrome)- AVSD
Turner syndrome- coarctation of aorta
Noonan syndrome- pulmonary stenosis
Coarctation of the Aorta
Aetiology (2)
Narrowing of aortic wall, usually at start of aorta
Turner’s syndrome
Coarctation of the Aorta
Signs + symptoms (8)
Poor feeding Lethargy Tachypnoea Radial-radial or radial-femoral delay Cold lower limbs Crescendo-decrescendo systolic or continuous murmur in left infraclavicular area or under left scapula Severe cardiovascular collapse after ductus arteriosus closure Acyanotic
Coarctation of the Aorta
Investigations (4)
ECG (RVH in neonates, LVH in adults)
CXR (congestive cardiac failure, indentation of aortic shadow)
Echocardiography
Cardiac MRI
Coarctation of the Aorta
Treatment (3)
Need to keep ductus arteriosus open: prostaglandin E1 infusion reopens it to allow some blood to flow from pulmonary artery to aorta and to systemic circulation
Congestive cardiac failure: inotropes and diuretics
Balloon angioplasty +/- stenting followed by resection with end to end anastomosis
Coarctation of the Aorta
Complications (3)
Hypertension
Re-coarctation
Aortic dissection
Paediatric Pulmonary Stenosis
Aetiology (1)
Noonan syndrome
Paediatric Pulmonary Stenosis
Signs + symptoms (3)
Ejection systolic murmur at right upper sternal edge with radiation to back, pulmonary ejection click, delayed S2 (if severe), parasternal thrill and heave
Reduced exercise tolerance
Exertional chest pain and syncope if severe
Paediatric Pulmonary Stenosis
Investigations (3)
ECG (RVH, RAH, RAD)
Echo (measure flow across valve)
CXR
Paediatric Pulmonary Stenosis
Treatment (2)
Balloon valvuloplasty to increase blood supply before puberty (causes pulmonary regurgitation but usually well tolerated)
Valve replacement surgery
Paediatric Aortic Stenosis
Aetiology (2)
William’s syndrome
Bicuspid valve
Paediatric Aortic Stenosis
Signs + symptoms (6)
Ejection systolic murmur at the right upper sternal edge with radiation to the carotids Heave Angina Syncope Dyspnoea Fatigue
Paediatric Aortic Stenosis
Investigations (2)
ECG (LAD, LVH)
Doppler echo
Paediatric Aortic Stenosis
Treatment (2)
Balloon valvuloplasty to increase blood supply before puberty (causes aortic regurgitation but less well tolerated than pulmonary) Valve replacement (earlier than in pulmonary)
Ventricular Septal Defect
Classification (2)
Muscular: lower and smaller
Pemimembranous: higher and larger
Ventricular Septal Defect
Associations (4)
Maternal TORCH infection
Drugs: phenytoin, lithium, alcohol, cocaine
Maternal diabetes
Down’s syndrome
Ventricular Septal Defect
Signs + symptoms (3)
Pansystolic murmur at lower left sternal edge
Signs of heart failure (tachycardia, tachypnoea)
Failure to thrive
Ventricular Septal Defect
Treatment (2)
Small and asymptomatic defects: monitoring, 50% resolve spontaneously
Surgery if large
Ventricular Septal Defect
Complications (3)
Eisenmenger’s complex
Right heart failure
Right ventricular hypertrophy
Ventricular Septal Defect
Eisenmenger’s complex (3)
RVH leads to pressure in the right ventricle exceeding pressure in the left ventricle during systole
Causing a reversal of the shunt to become R–>L
So the defect becomes cyanotic (if this happens it needs a heart-lung transplant)
Atrial Septal Defect
Associations (1)
Down’s syndrome
Atrial Septal Defect
Pathology (2)
Failure of ostium secundum to close
Fewer presenting features in childhood as atria have much lower pressure and pressure is similar between the two
Atrial Septal Defect
Signs + symptoms (2)
Ejection systolic murmur at pulmonary area
Usually asymptomatic in childhood and can present in adulthood with AF, heart failure or pulmonary hypertension
Patent Ductus Arteriosus
Anatomy (3)
In fetal circulation it allows a connection between the pulmonary trunk and aorta
Helps oxygenated blood from the right heart bypass the lungs and go straight to the body
When the fetal lungs open and the placenta is no longer the source of oxygenation, this shunt should close to allow blood to get to the lungs
Patent Ductus Arteriosus
Pathology (2)
Pressure in aorta is greater than in the duct causing L–>R shunts
Causes additional blood in the pulmonary circulation leading to lung hyperperfusion and steal from systemic circulation causing systemic ischaemia
Patent Ductus Arteriosus Risk factors (2)
Prematurity
Down syndrome
Patent Ductus Arteriosus
Signs + symptoms (4)
Infra-clavicular continuous murmur
Thrill
Pulse may be bounding and collapsing
If large, may show symptoms of circulatory overload: shortness of breath, feeding difficulties and poor weight gain
Patent Ductus Arteriosus
Treatment (2)
Form term babies there is good chance of spontaneous closure within the first year, so monitor with echos and prostaglandin inhibitors (eg. indomethacin) may help to promote closure
For preterm babies give prostaglandin inhibitors and surgical closure
Transposition of the Great Vessels
Pathology (4)
Failure of spiralling of the aorticopulmonary septum in development
Aorta comes from right ventricle
Pulmonary artery comes from the left ventricle
Leads to 2 separate right heart and left heart systems, so the oxygenated and deoxygenated blood exist in 2 separate circuits- incompatible with life unless a fetal shunt is maintained in the neonate (patent foramen ovale, PDA, VSD)
Transposition of the Great Vessels
Signs + symptoms (3)
Cyanosis
Tachypnoea
No murmur
Transposition of the Great Vessels
Treatment (2)
Buy time: prostaglandin E1 to maintain patency of ductus arteriosus, Rashkind’s procedure (catheter used to poke a hole through atrial septum to re-open foramen ovale)
Transfer to specialist unit for surgical ‘switch’ procedure
Tetralogy of Fallot
Pathology (4)
Right ventricular outflow tract obstruction (pulmonary stenosis)
Right ventricular hypertrophy
Ventricular septal defect
Overriding aorta
Tetralogy of Fallot
Associations (2)
22q11 deletion syndrome (DiGeorge)
Down’s
Tetralogy of Fallot
Signs + symptoms (3)
Cyanosis (because even though the heart pumps more blood it is at least partly deoxygenated)
Ejection systolic murmur (pulmonary stenosis)
Tet spells: develop blue skin/lips after crying/feeding due to rapid drop in O2 in blood, toddlers or older children might instinctively squat when they’re short of breath to increase blood flow to the lungs by kinking the femoral arteries to create a temporary LV outflow tract obstruction
Paediatric Heart Failure
Aetiology (6)
Left to right shunt (volume overload): VSD, PDA Valvular regurgitation (volume overload) Outflow tract obstruction (pressure overload): stenosis of valves Coronary insufficiency (low O2 supply): coronary artery anomalies Cardiomyopathies: systolic dysfunction (low cardiac output), diastolic dysfunction (elevated pulmonary capillary pressure) Arrhythmias: systolic dysfunction (low cardiac output)
Paediatric Heart Failure
Presentation in infants (4)
Difficulty in feeding
Cyanosis
Tachypnoea
Sinus tachycardia
Paediatric Heart Failure
Presentation in children (5)
Fatigue SOB Tachypnoea Exercise intolerance Abdominal pain
Normal Development
Weight (2)
Initial weight loss: acceptable for breast fed babies to lose up to 10% and formula fed to lose up to 5% by day 5, should be back at birth weight by day 10 Average weekly weight gain: - 0-3 months 200g - 3-6 months 150g - 6-9 months 100g - 9-12 months 75-50g
Normal Development 6 weeks (1)
Smiling (social)
Normal Development 8 weeks (2)
Fix eyes on object and attempt to follow, prefer face to object (fine motor)
RED FLAG- no social smile
Normal Development 3 months (2)
Cooing noise, comfort from parents (language)
Takes things to mouth (social)
Normal Development 4 months (1)
Supports head up, rolls from belly to back (gross motor)
Normal Development 5 months (1)
RED FLAG- can’t hold an object
Normal Development 6 months (4)
Can hold body up but not have balance to sit unsupported, rolls back to belly (gross motor)
Palmar grip (fine motor)
Noise with consonants, responds to tone of voice (language)
Recognises several people (social)
Normal Development 9 months (4)
Sits unsupported, crawling (bottom shuffling is a normal variant), pulls to standing (gross motor) Scissor grip (fine motor) Babbles with certain sounds for different things, may respond no, looks for toys that fall out of sight (language) Apprehensive of strangers (social)
Normal Development 12 months (5)
RED FLAG- cannot sit unsupported
Walks whilst holding onto furniture (gross motor)
Pincer grip, scribbles (fine motor)
Single words, follows simple instruction (language)
Points, waves, claps, copies actions (social)
Normal Development 15 months (1)
Walking (gross motor)
Normal Development 18 months (3)
RED FLAG- can’t stand independently
RED FLAG- no words
RED FLAG- no interest in others
Normal Development 2 years (4)
RED FLAG- can’t walk themselves
Run and kick a ball (gross motor)
Pencil grip (fine motor) but v basic
Dry by day
Normal Development
2.5 years (1)
RED FLAG- not running
Normal Development 3 years (2)
Climb stairs 1 foot at a time
Bowel control
Normal Development 4 years (2)
Walks up stairs normally
Dry by night, dresses self
Normal Development RED FLAGS (9)
Loss of milestones No social smile by 8 weeks Can't hold object by 5 months Can't sit unsupported by 12 months Can't stand independently by 18 months No words by 18 months No interest in others by 18 months Can't walk by 2 years Can't run by 2.5 years
Newborn Examination (3)
HBV immunisation if mother HBV +ve
Bloodspot: CF, congenital hypothyroidism, sickle cell disease
Clinical examination
Newborn Hearing Screening (2)
Otoacoustic emission test by 28 days
Auditory brainstem response test if abnormal
Health Visitor Input (4)
1st visit: feeding, maternal mental health, jaundice
Health visitor + GP review at 6-8 weeks
27-30 month review of development and physical measurements
Last visit age 5
Immunisation
5 in 1 (3)
Don’t tell Peter’s Parents, Bro
Diphtheria, tetanus, pertussis, polio, H.influenzae B
2 months, 3 months, 4 months
Immunisation
Pneumococcal Conjugate Vaccine (PCV) (1)
2 months, 4 months, 1 year
Immunisation Rotavirus vaccine (1)
2 months, 3 months
Immunisation
Meningococcal B vaccine (1)
2 months, 4 months, 1 year
Immunisation MMR vaccine (2)
1 year
3 years 4 months
Immunisation
4 in 1 (2)
Don’t tell Peter’s Parents
Diphtheria, tetanus, pertussis, polio
Immunisation
3 in 1 (3)
Don’t tell Peter
Diphtheria, tetanus, polio
14 years
Immunisation 2 months (4)
5 in 1
PCV
Rotavirus
Men B
Immunisation 3 months (2)
5 in 1
Rotavirus
Immunisation 4 months (3)
5 in 1
PCV
Men B
Immunisation 1 year (3)
PCV
Men B
MMR
Immunisation
3 years 4 months (2)
MMR
4 in 1
Immunisation 14 years (1)
3 in 1
Developmental Delay
Definition (2)
Performance 2 standard deviations below the mean of age-appropriate norm
Correct for prematurity until 2 y/o
Developmental Delay
Differentials (5)
Global developmental delay (performance 2SD below expected in 2+ domains)
Motor impairment: delayed maturation, cerebral palsy, muscular dystrophy
Sensory impairment: deafness, visual impairment
Speech and language impairment: specific language impairment, deaf, lack of stimulus, learning difficulty, bilingual
Social impairment: autism, elective mutism, learning disability, attachment issues, neglect
Global Developmental Delay
Aetiology (4)
Prematurity
Genetic disorder
Neglect
Congenital infection
Cerebral Palsy (Motor Delay) Definition (1)
Permanent non-progressive (lesion is static, however clinical picture isn’t) motor disorder due to brain damage before birth
Cerebral Palsy (Motor Delay) Aetiology (3)
Prenatal: placental insufficiency, smoking, alcohol, drugs, ToRCH infection
Perinatal: prematurity, anoxia
Postnatal: CMV, rubella, head trauma
Cerebral Palsy (Motor Delay) Classification (4)
Spastic: increased tone and reduced function- damage to UMNs
Dyskinetic: problems controlling muscle tone with hypertonia and hypotonia- damage to basal ganglia
Ataxic: problems with coordinated movement- damage to cerebellum
Mixed
Cerebral Palsy (Motor Delay) Patterns (4)
Monoplegia (one limb)
Hemiplegia (one side of body)
Diplegia (four limbs affected but mostly the legs)
Quadriplegia
Cerebral Palsy (Motor Delay) Signs + symptoms (7)
Spasticity Weakness/paralysis Poor coordination Delayed walking Sensory impairment Contractures Primitive reflexes (persistence of 2+ suggests child will be non-ambulatory): moro startle reflex, parachute reflex, tonic neck reflex, neck righting reflex, extensor thrust
Muscular Dystrophy (Motor Delay) Aetiology (3)
Duchenne’s muscular dystrophy (X-linked recessive- Xp21)
Becker’s muscular dystrophy
Myotonic dystrophy
Muscular Dystrophy (Motor Delay) Signs + symptoms (8)
Delayed gross motor skills Progressive muscle weakness Shoulders and arms held back when walking Protruding abdomen Poor balance Toe walking Foot drop Symmetrical proximal weakness: waddling gait, calf hypertrophy, +ve Gower's sign (uses hands to push up onto legs)
Muscular Dystrophy (Motor Delay) Investigations (4)
Creatinine kinase (>1000)
Muscle biopsy
DNA serology
EMG
Autism Spectrum Disorder (Social Delay)
Epidemiology (2)
1:100
M>F 4:1
Autism Spectrum Disorder (Social Delay)
Signs + symptoms (4)
Reciprocal social interaction difficulties: lack of socio-emotional cue recognition, difficulty modifying behaviour in social situation
Communication difficulties: poor use of language, inflexible language use (stereotypies and persistent echolalia- repeating what you say)
Restricted, repetitive and stereotyped patterns of behaviour, interests and activities: rituals, routines, resistance to change
Infants tend to hit early milestones but may lose some around 2y/o