- Chronic respiratory duration exceeding pediatric viral timeline (>14 days)
- Nocturnal cough acceleration and orthopnea (recumbent pulmonary venous congestion)
- Exertional exhaustion and feeding difficulty reflecting impaired cardiac output
In infants and young children, dilated cardiomyopathy or viral myocarditis often presents with a hacking cough, tachypnea, and wheeze—closely mimicking bronchitis, RSV, or reactive airways.
When a child lies flat at night, venous return increases preload. A failing left ventricle cannot accommodate the load, precipitating subclinical pulmonary edema and severe nocturnal coughing fits.
Unlike transient lethargy during fever, progressive inability to finish bottles without sweating or stopping mid-play signals decreased stroke volume rather than an uncomplicated viral infection.
| Prior Diagnosis Given | winter bug / upper respiratory infection |
|---|---|
| Reported Cough Duration | 21 days |
| Tachypnea / Resting Respiratory Rate | 34 breaths/min |
| Fatigue with Feeding or Play | Present (True) |
| Worsening at Night (Orthopnea mimic) | Present (True) |
| Swelling or Cyanosis | Absent (False) |
| Calculated Cardiac Risk Score | 82 / 100 |
| Matched Red Flags | 3 criteria met |
| Primary Differential | Occult Cardiomyopathy / Heart Failure Mimic |
| Urgency Recommendation | Immediate Clinical Re-evaluation Required |