A neonate has recurrent attacks of abdominal pain, restless irritability and diaphoresis on feeding. Cardiac auscultation reveals a nonspecific murmur. He is believed to be at risk for M.I. Likely diagnosis here is:
**Core Concept**
The neonate's symptoms suggest a condition that involves an abnormal narrowing of a blood vessel, leading to decreased blood flow to the intestines. This condition is exacerbated by feeding, causing abdominal pain and other symptoms.
**Why the Correct Answer is Right**
The likely diagnosis is **Cyanotic Congenital Heart Disease**, specifically Tetralogy of Fallot (TOF). TOF is characterized by four key features: ventricular septal defect, pulmonary stenosis, right ventricular hypertrophy, and an overriding aorta. The nonspecific murmur heard on cardiac auscultation is likely due to the turbulent blood flow through the narrowed pulmonary valve or the ventricular septal defect. The risk of myocardial infarction (M.I.) is not directly related to TOF, but the underlying cardiac anomaly increases the risk of arrhythmias and other cardiac complications.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the symptoms described.
* **Option B:** This option is not a direct consequence of the symptoms described.
* **Option D:** This option is not a likely diagnosis for the symptoms described.
**Clinical Pearl / High-Yield Fact**
Tetralogy of Fallot is a classic example of a cyanotic congenital heart disease, characterized by increased pulmonary vascular resistance and decreased pulmonary blood flow. This condition requires prompt medical attention to prevent long-term complications.
**Correct Answer:** C.