________ is currently used to diagnose cavities. An electric current is passed through a tooth, and the tooth's resistance is measured. A decayed tooth has a different resistance reading than a healthy tooth.

Which of the following is NOT a sign of myocardial irritability?

A) Frequent or increasing PVCs B) Short bursts of Ventricular Tachycardia C) Asystole D) Multifocal PVCs

In a small number of patients with a spinal cord injury or massive head injury, ____ may be required in order to decrease vascular volume and support the blood pressure.

A. vasopressors B. bronchodilators C. corticosteroids D. benzodiazepines