1. Ask “How Blue?” and “How Old?”
Before you assume it’s just another virus, start with this:
- How Blue? Is this a child who’s dusky, cyanotic, or desatting in a way that doesn’t match their respiratory effort?
- How Old? Time matters:
- 5–10 days → Think ductal-dependent lesions (e.g., coarctation, HLHS, pulmonary atresia)
- 3–5 months → Think VSDs, ALCAPA and heart failure symptoms
- Toddler or beyond → Think missed TOF, myocarditis, post-cardiac surgery complications
🧠 Pearl: At the 1st week of life, the closing of the ductus arteriosus unearths critical CHD. At 2-3 months, pulmonary vascular resistance and hemoglobin drop, increasing shunts and worsening heart failure.
2. Feel the Femoral Pulses. Always.
This is your one-second bedside screening tool for coarctation and critical aortic outflow obstruction.
- Palpable but decreased femorals → Red flag
- Absent or bounding upper extremity pulses only → Consider CoA or arch interruption
- Gallop + weak pulses in an infant? Treat like cardiac shock until proven otherwise
🩻 CXR bonus tip: Lungs white? Think pulmonary edema because backup of flow from left side of heart. Lungs black? Think decreased pulmonary blood flow (e.g., TOF, pulmonary atresia).
3. The Chief Complaint Is a Lie
Kids with CHD rarely walk in with a sign that says “Hey! My heart’s broken!”
Instead, you’ll see:
- Poor feeding that’s blamed on reflux
- Respiratory distress that looks like bronchiolitis (especially VSD or heart failure)
- Gastro symptoms that are really early tamponade or heart failure
- Sepsis workups that miss the fact that the real infection risk is their underlying anatomy
🚨 If a well-appearing infant crashes fast—think CHD.
💬 Final Thought
If a baby in the ED looks worse than their labs suggest, trust your gut and consider the heart. When in doubt:
- Ask “How blue?”
- Ask “How old?”
- Feel the femorals.
And if you’re still unsure, phone a cardiology friend—they’d rather be called early than called for the crash.
Dr. Mudit Gupta, MD, PhD, is a Pediatric Interventional Cardiologist at the Children’s Hospital of Philadelphia. He can be reached at GUPTAM5@chop.edu.
