Why would the history be important of a patient that takes a beta-blocker, a calcium channel blocker, and an ACE inhibitor?

You are utilizing the R-R interval method to calculate a heart rate on an ECG and you have counted 15 small boxes between two consecutive R waves. What is the heart rate of this ECG?

Which of the following would lead you to suspect electrical alternans?

Hypoventilation from an injury or disease would BEST be defined as: 

Which of the following adventitious lung sounds would MOST likely result from a bronchospasm?

You are assessing a patient you suspect is suffering from cardiogenic shock. Which of the following would best help you differentiate this as a left-sided issue?

Why should the administration of CPAP be considered in patients with pulmonary edema?

You have just arrived on the scene of a patient complaining of chest pain. The patient states the pain began approximately 30 minutes prior to your arrival and has remained unchanged after rest and nitro. The patient denies any radiation and also denies any difficulty breathing. The pain is sharp in nature and rates the pain as a 7 on a 1 to 10 scale. Which of these assessment findings is MOST suggestive that this patient is experiencing a cardiac event?

You are dispatched to a 25-year-old patient choking in a break room at a factory. The patient is coughing uncontrollably and tells you the cause is food. What is the BEST description of this condition? 

You are transporting a 42-year-old with a history of multiple sclerosis to the hospital after a fall in the home. Enroute to the scene you and your partner are differentiating between symptoms of the disease versus the fall. Which of these symptoms is MOST attributable to the disease rather than the fall?