Is pulmonary embolism in an infant fatal?

Can be. A pulmonary embolism, regardless of the age of the patient, can be fatal. It should be noted that not all pulmonary emboli are fatal and the incidence of pulmonary emboli in infants is quite small.
Not necessarily. Pulmonary embolism is unfortunately a relatively common cause of death, but with emergent treatment it is most frequently treatable.
Possible. Pulmonary embolism can be fatal at any age, and should be treated immediately.
Yes, but rare. It can be, but its rare except at or near birth.
Can Be; Not Always. A pulmonary embolus is serious and can certainly be fatal. But an infant can survive smaller emboli. Survival depends on the size and other conditions of the child.

Related Questions

When pulmonary embolism happens in the lungs, what makes it so fatal?

Several things. A massive pulmonary embolus will essentially block most of the blood flow from the right ventricle to the lungs, preventing blood from getting oxygenated while putting a huge strain on the right ventricle. Since blood is then blocked from getting to the left side of the heart, systemic blood pressure severely drops along with oxygen delivery and things rapidly go down the tubes.
Heart stops. The problem with pulmonary emboli is that the blood clot obstructs the blood flow through the lungs. So the right side of the heart tries to pump blood through an obstructed pulmonary artery and it cannot. Thus the right heart of the heart stops and the patient's blood pressure drops and the patient collapses and dies. Pulmonary emboli are really dangerous.

What do I do if my baby experiences pulmonary embolism?

Call 911. Pulmonary embolism is not common in children and young adults but it can be a killer. So it is important to get help immediately. Children with pulmonary embolism may only have difficulty breathing or breath very fast. Most children who develop a pulmonary embolism have a blood disorder which causes the blood to clot too easily.
Emergency admission. Pulmonary embolism is a very serious disease and patient needed emergency hospitalization and usually pulmonologist will take care of them with intravenous Heparin or other anticoagulation treatment if the diagnosis is certain. I had been in practice for many years, but have not encountered babies with pulmonary embolism. I refer your question to healthtaps pulmonologist. My practice is in surgery.
Blood thinners. Imperative to continue blood thinners and to do extensive hematologic and genetic testing to find the cause of thrombus formation in young age.
How old? If you are taking about a child with pulmonary embolism, this is very serious and of course treatment is anticoagulant like Heparin then Coumadin (warfarin). Also need investigations for risk factors. Pe in children is very rare less than 5 in 100000.
See A Doctor. A pulmonary embolism is serious. It cannot be diagnosed without special tests, so you would likely not be at home and know with certainty that your child had a pe. If you are concerned, please seek attention immediately (i.e. Go straight to er).

How will having a pulmonary embolism affect my baby?

No direct effect. Pulmonary embolism (pe) is a potentially life threatening event that can occur as a result of a deep vein thrombosis (DVT) and DVT risk is increased by a factor of about 30 during pregnancy. Having a pe would not have a direct effect on your fetus, but fetal survival is dependent on maternal survival. Having a DVT and/or a pe will require anticoagulation, which can be done safely during pregnancy.
Hypoxia. If a pregnant mother has a pulmonary embolism it could lower her blood oxygen levels and then lower oxygen levels in the fetus. It is important to avoid/treat any hypoxia in a pregnant mom if it indeed is present.
Who has it. If you had pulmonary embolism (pe) while pregnant it could affect your baby development. The higher oxygen level is and shorter time of low oxygen in your blood is - it is less likely to affect your baby. Make sure you are on blood thinner (heparin) and if necessary also on oxygen.
Hypoxia. If you are pregnant and developed pe (pulmonary embolism) then you can develop low oxygen (hypoxia) which can cause fetal damage in early stages for organ development or fetal death if severe hypoxia. Also you should be taking heparin/lovenox injections because they are safer than Coumadin (warfarin) on fetal effect.
Talk to your high. Risk OB & get answers. Good luck as these things can be very successfully managed.
Depends. The size and severity of the pe determine the long term effects. Small pes can be "relatively" well tolerated in that the child survives and does not develop long term problems. But large pes can be life threatening and lead to abnormal heart and lung function.