18. The Heart

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?

Which of the following waves represents atrial depolarization in the electrical conduction system of the heart?

Which structures coordinate contraction in cardiac muscle cells within the electrical conduction system of the heart?

What occurs during the QRS complex in the electrical conduction system of the heart?

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

Which medication reduces the workload of the heart by treating abnormal heart rhythms?

The heart contracts because of an electrical impulse. Where in the heart does this impulse start?