Which type of ecg machine is less likely to pick up interference?

Obesity.

Anatomical considerations, such as the size of the chest and the location of the heart within the chest.

Movement during the test.

Exercise or smoking before the test.

Certain medicines.

Electrolyte imbalances, such as too much or too little potassium, magnesium, or calcium in the blood.

Explanation:

was there more to the question like a picture or something? also i mean with no picture i think something that's not likely to be an educational impact would probably be the way the child is raised since it has special health care needs