(a) Upon certification by the department, cardiac technicians may do any of the following:

(1) Render first-aid and resuscitation services;

(2) Upon the order of a duly licensed physician and as recommended by the Georgia Emergency Medical Services Advisory Council and approved by the department:

(A) Perform cardiopulmonary resuscitation and defibrillation in a hemodynamically unstable patient;

(B) Administer approved intravenous solutions;

(C) Administer parenteral injections of antiarrhythmic agents, vagolytic agents, chronotropic agents, alkalizing agents, analgesic agents, and vasopressor agents or administer opioid antagonists;

(D) Perform pulmonary ventilation by esophageal airway and endotracheal intubation; and

(E) Upon the order of a duly licensed physician during a public health emergency, as defined in Code Section 31-12-1.1, administer vaccines.

(b) While in training preparatory to becoming certified, cardiac technician trainees may perform any of the functions specified in this Code section under the direct supervision of a duly licensed physician or a registered nurse.