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 cardiac condition that may lead to myocardial ischemia (M.I.) due to increased oxygen demand. This is likely related to a congenital heart defect causing left-to-right shunting, leading to increased pulmonary blood flow and subsequent pulmonary hypertension.
**Why the Correct Answer is Right**
The correct diagnosis is likely Tetralogy of Fallot (TOF), a congenital heart defect consisting of four components: ventricular septal defect (VSD), pulmonary stenosis, right ventricular hypertrophy, and an overriding aorta. The increased pulmonary resistance and right-to-left shunting in TOF can lead to decreased oxygenation of systemic blood, potentially causing myocardial ischemia. The nonspecific murmur heard in this patient may be indicative of the VSD component of TOF.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the symptoms described, as it is a diagnosis related to a different set of clinical findings.
**Option B:** Hypertrophic cardiomyopathy (HCM) can cause chest pain and diaphoresis, but it does not typically present with a nonspecific murmur in neonates, and M.I. is not directly related to feeding.
**Clinical Pearl / High-Yield Fact**
In neonates, a nonspecific murmur and symptoms of abdominal pain, irritability, and diaphoresis on feeding should raise suspicion for a congenital heart defect causing left-to-right shunting, such as TOF.
**Correct Answer:** D. Tetralogy of Fallot