Cardiac Resynchronization Therapy Concepts

Cardiac resynchronization therapy (CRT) is a treatment for heart conditions where the heart's pumping is uneven due to electrical conduction issues, such as left bundle branch block. CRT devices are implanted to synchronize the heart's ventricles, improving cardiac output and patient quality of life. The device uses leads to bypass blockages and restore synchronized heart function.

What does a healthy heart do to supply the body with oxygen and nutrients?

• It pumps blood intermittently.

• It pumps blood randomly.

• It pumps blood synchronously.

• It pumps blood unevenly.

What controls the heart's pumping motions?

• Blood pressure

• Electric pulses

• Chemical signals

• Muscle contractions

What happens when there is a left bundle branch block?

• The heart stops beating.

• The right bundle branch is blocked.

• The ventricles contract simultaneously.

• The electrical stimulus is not passed on to the left ventricle.

What is the result of delayed excitation in the ventricles?

• Even pumping motions

• Increased pumping force

• Weaker heart muscle

• Synchronized heartbeats

How is the CRT device implanted?

• Through a large incision in the chest

• Through a small incision below the collarbone

• Through an incision in the abdomen

• Through a small incision in the leg

How many leads are connected to the heart with the CRT device?

• Two

• Four

• One

• Three

What does the atrial lead of the CRT device monitor?

• Ventricular rate

• Atrial rate

• Blood pressure

• Heart muscle strength

What is the purpose of the ventricular leads in the CRT device?

• To measure blood pressure

• To monitor the atrial rate

• To conduct electric pulses into the ventricles simultaneously

• To strengthen the heart muscle

How does the CRT device improve the heart's pumping function?

• By decreasing the heart rate

• By blocking the right bundle branch

• By synchronizing the pumping motion

• By increasing the heart rate

What is one of the benefits of cardiac resynchronization therapy?

• Increased heart rate

• Improved quality of life

• Weaker heart muscle

• Decreased cardiac output