A 3-day-old baby, well at birth, suddenly becomes pale, mottled and shocked. Femoral pulses are difficult to feel. What must be considered alongside sepsis? A. Duct-dependent congenital heart disease B. Physiological jaundice C. Transient tachypnoea of the newborn D. Hypoglycaemia alone ANSWER: A — a duct-dependent lesion. Why: the pattern is characteristic. WELL AT BIRTH, then sudden collapse over the first days as the ductus arteriosus CLOSES. Weak or absent femoral pulses point to obstruction of the aorta. WHY IT IS MISSED: it looks exactly like neonatal sepsis, which is far commoner — so the cardiac cause is only found if someone thinks of it. WHAT TO DO: feel the femoral pulses in EVERY collapsed newborn, and discuss urgently with a specialist centre. The duct can be held open pharmacologically, but only if the diagnosis is considered.

Which single murmur feature makes a murmur pathological regardless of anything else? A. Loudness greater than grade 2 B. Any diastolic murmur C. Radiation to the axilla D. Presence during fever ANSWER: B — any diastolic murmur. Why: a diastolic murmur is NEVER innocent. Innocent murmurs are systolic, soft, short, at the left sternal edge, and change with posture, in an otherwise well child. A: loudness raises suspicion but a soft murmur can still be significant. D: fever INCREASES flow and commonly makes an innocent murmur louder — it is not evidence of disease.

Why is feeding history so important when assessing an infant with a murmur? ANSWER: because feeding is an infant's EXERCISE TEST. An infant cannot climb stairs. Feeding is the most strenuous thing they do, so cardiac failure shows itself there first: - SWEATING during feeds - BREATHLESSNESS, or pausing frequently - Taking a very long time to feed - Stopping halfway and falling asleep exhausted - POOR WEIGHT GAIN as a result This history matters far more than the exact character of the murmur. A well-thriving baby who feeds normally with a soft systolic murmur is a different problem from a sweaty, slow-feeding baby with the same murmur.

A cyanosed newborn is given high-flow oxygen and the cyanosis barely improves. What does this suggest? ANSWER: a CARDIAC cause rather than a respiratory one. REASONING: in cyanotic congenital heart disease, deoxygenated blood bypasses the lungs through a right-to-left shunt and reaches the body directly. Enriching the inspired air cannot oxygenate blood that never passes through the lungs. In respiratory disease the blood does traverse the lungs, so raising the inspired oxygen usually improves saturation appreciably. This is a useful bedside discriminator, and a common examination point.

A 2-year-old who was walking and using several words has lost both skills over three months. How should this be interpreted? ANSWER: REGRESSION — losing acquired skills. This is a RED FLAG and needs urgent assessment. WHY IT IS DIFFERENT FROM DELAY: normal variation produces a child who arrives at milestones SLOWLY. It never produces a REVERSAL. A child who had a skill and has lost it is not a slow developer. CONTRAST THE THREE PATTERNS: Progressing slowly along the normal sequence → delay Stopped progressing → concern LOSING skills already acquired → urgent FIRST STEPS IN ANY DEVELOPMENTAL CONCERN: check HEARING and VISION. Both mimic developmental delay and both are treatable.

A parent asks whether their child's cerebral palsy will get worse. How should this be answered? ANSWER: the brain LESION is non-progressive, but what you SEE changes as the child grows. - The injury itself does not worsen. - But muscles that do not stretch in proportion to growing bones produce CONTRACTURES; hips may subluxate; scoliosis may develop. - So function can decline even though the lesion is fixed. WHY THE EXPLANATION MATTERS: parents told "non-progressive" and then seeing deterioration feel misled. Explain both parts. IMPORTANT CAVEAT: TRUE regression or NEW neurological signs mean the diagnosis should be revisited — a progressive neurological disorder can be mistaken for cerebral palsy early on. AND: motor impairment does NOT predict intelligence. Assess cognition and communication separately.

Why does a newborn with Down syndrome require cardiac assessment even with a normal examination? ANSWER: because congenital heart disease is common in Down syndrome, and a significant lesion may be SILENT early. A large left-to-right shunt may produce no murmur and no symptoms in the first weeks, while pulmonary blood flow is already high. THE CONSEQUENCE OF MISSING IT: prolonged high pulmonary blood flow causes IRREVERSIBLE pulmonary vascular damage, after which surgical correction is no longer possible. So cardiac assessment is part of the INITIAL workup, not something arranged if a murmur appears later. Down syndrome also carries hearing, visual, thyroid, atlantoaxial and infection-related associations, which is why structured surveillance is used rather than waiting for problems.