Key points about CRT
• CRT may improve symptoms and quality of life for certain heart failure patients.• It involves implanting a device that helps synchronize heartbeats.
• Candidates typically have reduced ejection fraction and electrical conduction delays.
• The procedure is generally well tolerated and recovery is usually short.
• Follow-up care includes device checks and heart failure management.
Overview of cardiac resynchronization therapy
Cardiac resynchronization therapy is a specialized form of pacemaker therapy for heart failure patients whose heart chambers are not beating in a coordinated way. It helps the heart pump more effectively by synchronizing contractions of the ventricles.Candidates for CRT
CRT is generally considered for patients who:• Have symptomatic heart failure (typically NYHA class II–IV).
• Have a left ventricular ejection fraction (LVEF) of 35% or less.
• Show a prolonged QRS duration (often ≥130–150 ms) with left bundle branch block pattern.
• Are already receiving guideline-directed medical therapy without sufficient symptom relief.
Preparation for CRT
• Patients may undergo imaging (such as echocardiogram or cardiac MRI) to assess heart function.• An ECG is used to evaluate electrical conduction.
• Blood tests and medication review are part of the pre-procedure workup.
• Instructions will be given to stop certain medications or fast before the procedure.
Recovery from CRT
• Most patients are monitored overnight and discharged the next day.• Minor discomfort at the implant site is common for a few days.
• Physical activity may be limited for several weeks to allow the leads to settle.
• Follow-up visits are scheduled to check device function and heart rhythm.
• Improvement in symptoms may take weeks or months as the heart adapts.
Risks for CRT
While CRT is generally safe, possible risks include:• Infection or hematoma at the device site.
• Lead displacement requiring repositioning.
• Rare complications like pneumothorax, cardiac perforation, or arrhythmia.
• Non-response to CRT—some patients may not experience symptom improvement.