Cardiac Resynchronization Therapy (CRT)

Cardiac Resynchronization Therapy (CRT) is a treatment for heart failure that involves the use of a device to coordinate the beating of the heart's chambers. The goal of CRT is to improve the heart's pumping function and reduce symptoms of heart failure.

How it Works

CRT devices, also known as biventricular pacemakers, are implanted under the skin and connected to the heart through leads (thin, insulated wires). The device sends electrical impulses to both ventricles (the lower chambers of the heart) to synchronize their contractions. This helps to improve the heart's pumping efficiency and reduce strain on the heart.

Indications

CRT is typically recommended for patients with:

Benefits

CRT has been shown to:

  • Improve symptoms of heart failure, such as shortness of breath and fatigue
  • Enhance exercise tolerance and quality of life
  • Reduce hospitalizations due to heart failure
  • Prolong survival in patients with severe heart failure

Risks and Complications

As with any medical procedure, CRT carries potential risks and complications, including:

Device Components

A CRT device typically consists of:

  • A pulse generator (the main device component that contains the battery and electronic circuitry)
  • Leads (thin, insulated wires that connect the pulse generator to the heart)
  • Electrodes (small sensors at the tip of each lead that detect electrical activity in the heart)

Follow-up Care

After CRT device implantation, patients require regular follow-up appointments with their healthcare provider to:

  • Monitor device function and adjust settings as needed
  • Assess heart function and overall health status
  • Address any concerns or issues related to the device or underlying heart condition

Frequently Asked Questions (FAQs)

What is Cardiac Resynchronization Therapy (CRT)?
A treatment for heart failure that uses a device to coordinate the heartbeat.

How does CRT work?
By sending electrical impulses to both ventricles to synchronize their contractions.

Who is eligible for CRT?
Patients with certain types of heart failure and evidence of ventricular dyssynchrony.

What are the benefits of CRT?
Improved symptoms, increased energy, and reduced hospitalizations.

Is CRT a surgical procedure?
Yes, it requires implantation of a device under the skin.

What type of device is used for CRT?
A pacemaker or implantable cardioverter-defibrillator (ICD) with CRT capability.

How long does the procedure take?
Typically 1-2 hours.

Are there risks associated with CRT?
Yes, including infection, bleeding, and device malfunction.

Can CRT be adjusted or turned off?
Yes, the device can be programmed and adjusted by a healthcare provider.

Does CRT cure heart failure?
No, it helps manage symptoms and improve quality of life.

Article last updated on: 25th June 2025.
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