Which is more dangerous, a hole in the heart or coarctation of the aorta?

Apples/oranges. Since there are variations in the size of any hole or the amount of tightness in any coarctation the question cannot have a simple answer. Some holes close without treatment, some produce heart failure without treatment. Some coarctations need urgent surgery while others can go years without treatment.
Depends. Depends on the size of the hole and degree of coarch narrowing. In general i'd say coarctation of the aorta is more limiting to people's lifestyle, but patent vsd or ASD can lead to stroke if clots pass through the heart to the brain.

Related Questions

I have had vsd repair and coarctation of aorta am I more susceptible for heart attack. Warning signs? How to tell if its a heart attack or anxiety?

Watch BP/arrhythmia. Correction of coarctation of the aorta can still leave patients at risk for hypertension and/or arrhythmia. Vsd repair patients can also be at risk for arrhythmias later. Slow heart rates that might require pacemakers as well as fast heart rates (ventricular or supra ventricular) might develop.
Minor risk. Good news! As long as you've had an adequate repair of both, edison's you are no more prone to getting a heart attack than anyone in the general public. You may have an anxiety problem.
Possibly. Patients with coarctation are, unfortunately, at greater risk of coronary artery disease. The reason is not well understood, but there is good evidence to support this. Please discuss the warning signs with your doctor; but they include severe chest pain, palpitations, arm pain, sweating, fainting, difficulty breathing. Please seek medical attention immediately if you are concerned.

How does coarctation of the aorta develop in the heart?

Not in the heart. Coarctation of aorta by definition does not occur in the heart. It is usually in the descending segment of the aorta and it is congenital (person is born with it). The exact location is variable, sometimes it involves the aorta proximal to the take off of the left subcalvian (artery to the left arm) and at times distal to it. It is essentially a narrowing of the lumen of the artery.
Coarctation. This develops in utero so is a congenital defect. It is a narrowing of the aorta usually just below the left subclavian artery that goes to the left arm. It can be associated with bicuspid aortic valve, vsd, and can cause hypertension. 10% of people with coarctation can have berry aneurysms of the brain arteries.
Narrowing. Coarctation generally occurs near the site where the PDA connects to the aorta. The PDA is a normal channel in fetal circulation which helps bypass the lungs (since fetuses don't breathe air). When the baby is born, the PDA constricts and closes. In some, it leads to narrowing/coarctation in the aorta as well.

My son was born with hypoplastic coarctation aorta. As it was hypoplastic does that mean the problem occured during fetal/heart development?

Yes. Coarctation of the aorta is a congenital heart defect, meaning that it is an abnormality of cardiovascular development. Sometimes, there is associated aortic arch hypoplasia, which is probably what you are referring to. This combination requires a more extensive surgical repair for success. Generally, the arch hypoplasia is associated with more severe coarctation presenting early in life.

6 month son has heart checkup next month, operated for coarctation aorta at 1 week. Has bicispid valve and open pfo. Whats hould I be asking?

Symptoms and future. Ask what symptoms you should report, what your son's prognosis is, and what procedures would likely be contemplated in the future.
Will he need a Cath? Surgical repair of a coarctation as a baby sometimes narrows again, months to years later. The narrowing may be able to be simply balloon dilated to open it.... Just ask how the area looks... The bicuspid valve will need to be monitored through his lifetime, with yearly or every year visits and echos (ultrasound of the heart).
Depends. There are many things you could be asking. The most important is if there is any residual aortic obstruction and any aortic valve stenosis. Bicuspid aortic valves are common and can have no consequences, or they can become narrowed (rarely in infancy, but when older if at all). Pfo's are also common and do not require any treatment unless there are specific, rare issues, as an adult.

16 month son had heart surgery for coarctation aorta. He also has bicuspid valve, 2 pulm veins into 1 on one side anat. Still has 1-2 murmur - usual?

Murmur yes. Your son had coarctation repair from the side of the chest to repair the coarctation. He stil has a murmur and that is ok. He has a bicuspid aortic valve and he has 2 pulmonary veins draining abnormally. He probably has an ASD also. He may require surgery in the future as he gets older. It will be important to continue to follow with a doctor for life, even if you move.
Murmur. Heart murmur is not always abnormal. In children "innocent murmur" can be heard. Residual murmur may be related to the bicuspid valve or anomalous pulmonary venous return. Best to be followed by a pediatric cardiologist.