What condition does a 3-month-old baby with sweating with every feeding and a holosystolic murmur most likely have?

The symptoms of sweating with every feeding in a 3-month-old baby, combined with the presence of a holosystolic murmur, are highly indicative of a ventricular septal defect (VSD). VSD is characterized by an abnormal opening between the left and right ventricles of the heart, which allows blood to flow from the left ventricle into the right ventricle. This left-to-right shunt can lead to increased pulmonary blood flow, causing signs of heart failure such as poor feeding, sweating during feeds, and irritability.

The holosystolic murmur associated with VSD is typically heard best at the left lower sternal border, reflecting the turbulent flow of blood as it moves through the defect. In infants with VSD, the increased workload on the heart and lungs often results in symptoms such as sweating, fatigue during feeds, and respiratory distress.

In contrast to VSD, atrial septal defects result in a different murmur pattern and do not typically cause significant symptoms at such an early age. Pulmonary stenosis often presents with a systolic ejection murmur rather than a holosystolic one and tends to be associated with a specific set of symptoms, including exercise intolerance rather than feeding difficulties. Co