The acronym 5H-5T directs the search for the problem.

Problem Assess Possible Interventions
TEP No pulse w/ CPR, JVD Thrombolytics, surgery
Tension neumotorax No pulse w/ CPR, JVD, tracheal deviation Needle thoracostomy
cTnI+ (SCA) History, EKG Acute Coronary Syndrome algorithm
Toxicos Drug Overdose Medications, illicit drug use Treat accordingly

Tamponade cardiac
No pulse w/ CPR, JVD, narrow pulse pressure prior to arrest Pericardiocentesis
H+Acidosis
(preexisting)
Diabetic/renal patient, ABGs Sodium bicarbonate,
hyperventilation
Hyperkalemia
(preexisting)
Renal patient, EKG, serum K level Sodium bicarbonate, calcium chloride, albuterol nebulizer, insulin/glucose, dialysis, diuresis, kayexalate
Hypothermia Core temperature Hypothermia Algorithm
Hypovolemia Collapsed vasculature Fluids
Hypoxia Airway, cyanosis, ABGs Oxygen, ventilation