Answer:
Heart failure.
Step-by-step explanation:
Heart failure may be defined as the medical condition in which the heart is not able to pump the blood in the body. Coronary artery disease is the main reason of heart failure.
The main symptoms of heart failure are respiratory infections, systolic murmur, cardiomegaly, leg swelling and shortness of breath. The six month old infant shows all these symptoms of the heart failure. This all the assessment of the heart failure.
Thus, the correct answer is heart failure.