Question

The mother of a 4-month-old infant reports that he turned "blue" and seemed to have fast, laboured breathing seemed to improve. On physical examination, the mucous membranes of the lips and mouth appear mildly cyanotic. A systolic murmur is heard best at the left sternal border. Vital signs are normal with normal peripheral pulses. There is no hepatosplenomegaly. A likely diagnosis is:

1) congestive heart failure
2) apnea
3) coarctation of the aorta
4) cyanotic spell related to tetralogy of fallot

Answer 1

The likely diagnosis for a 4-month-old infant with cyanosis and fast, labored breathing is cyanotic spell related to tetralogy of Fallot.

Step-by-step explanation:

The likely diagnosis for a 4-month-old infant who turned "blue" and had fast, labored breathing is cyanotic spell related to tetralogy of fallot. Tetralogy of Fallot is a congenital heart condition where there is an opening in the interventricular septum and blockage of the pulmonary trunk. This leads to insufficient supply of oxygenated blood and cyanosis, resulting in a "blue baby". The symptoms mentioned in the scenario, such as cyanosis, a systolic murmur, and normal vital signs, align with the characteristics of cyanotic spells related to tetralogy of Fallot.