The administration of beta blockers and calcium channel blockers is associated with an increased risk of PEA.  This may be due to their effect on the interactions between calcium and troponin and their inhibition of myocardial contractility.  Syncope and pulmonary disease is also associated with a higher risk of PEA.
Pulseless electrical activity risk factors
Pulseless ventricular tachycardia risk factors
Pulseless electrical activity differential diagnosis
Pulseless electrical activity pathophysiology
Heat stroke other imaging findings
Heat stroke other diagnostic studies
Noonan syndrome ECG findings
Wide complex tachycardia risk factors