18. The Heart

What structure primarily controls the heartbeat in the human body?

Which of the following is true concerning the heart's conduction system?

Which of the following statements is correct in reference to heart function?

The normal pacemaker of the heart is the __________.

What normally serves as the pacemaker of the entire heart?

Which of the following descriptions of cardiac pacemaker cells is incorrect?

What initiates the release of calcium from the sarcoplasmic reticulum in cardiac muscle cells?

Which part of the cardiac conduction system receives electrical impulses from the bundle branches?

How is cardiac output calculated in the context of heart physiology?

Where is the SA node located in the heart?

How is backflow of blood from the right ventricle into the right atrium prevented?

Where in the heart is the sinoatrial node located?

Where is the heartbeat initiated in the heart?

Which statement is a valid teaching point for a client with cardiomyopathy regarding the heart's electrical events?

Which of the following arrhythmias can synchronized cardioversion be used to treat?