The right answer is Electrocardiography (or Electrocardiogram).
In a typical plot, one can notice five characteristic waves. They are called P, Q, R, S and T. The illustration below shows what a normal electrocardiogram looks like:
* the P wave marks the depolarization during the contraction of the atria;
* the PR interval indicates the time required to transmit the electrical impulse of the sinus node of the atria to the ventricular muscles;
* the QRS complex marks depolarization and ventricular contraction;
* the QT interval corresponds to the global ventricular repolarization;
* T wave refers to the end of ventricular repolarization.
The leading causes of death in children under the age of 1 year are developmental and genetic conditions that were present at birth, as well as
conditions due to premature birth. Other notable causes are unintentional injuries which can be fatal and homicide.
This is a tuff question because there are a lot of drugs that if misused could cause this problem. I wish this was multiple choice. But im going with "Oxycodone" as my answer
