The degree to which a measurement or an estimate based on measurements represents the true value of the attribute that is being measured is referred to as ____.

Which of the following is the maximum volume of air in liters expelled when the patient exhales as forcibly and quickly as possible following one maximum inhalation?

a. Forced vital capacity b. Forced expiratory volume c. Maximal midexpiratory flow d. Expiratory reserve volume

Which of the following is an absolute contraindication to stress testing?

A) Uncontrolled tachyarrhythmias or bradyarrhythmias B) Myocardial infarction less than 48 hours old C) Electrolyte abnormalities D) Mild to moderate aortic stenosis