18. The Heart

In which of the following situations should you avoid administering a synchronized shock?

Which events occur at the beginning of ventricular systole?

Which statement regarding cardiac muscle structure is accurate?

What is the correct sequence of travel by an impulse through the cardiac conduction system?

A client is administered atropine to increase the heart rate. What is the action of atropine on the heart's electrical activity?

In the electrical conduction system of the heart, the primary pacemaker is the:

Which structure within the heart's conduction system is known as the 'pacemaker of the heart'?

What are the conduction fibers found between the SA node and AV node called?

Which of the following is the correct formula for calculating cardiac output?

How can the heart rate be calculated using the QRS complexes on an electrocardiogram (ECG)?

What is the correct sequence of components of the cardiac conduction system?

Which of the following is the correct formula for calculating cardiac output?

In the electrical conduction system of the heart, which structure is considered the primary pacemaker that normally initiates each heartbeat?

A nurse is assessing a newborn's heart rate. Which of the following actions should the nurse take to obtain an accurate measurement?

Autorhythmicity in the heart (the ability to spontaneously generate electrical impulses) is primarily the responsibility of which structure?