Automation Implantable Cardiac Defibrillator(AICD)

Automatic Implantable Cardioverter Defibrillator (AICD): Life-Saving Device for Dangerous Heart Rhythms

An Automatic Implantable Cardioverter Defibrillator (AICD), also known as an Implantable Cardioverter Defibrillator (ICD), is a small electronic device implanted in the chest to monitor and correct life-threatening heart rhythms (arrhythmias).

It can deliver electrical shocks or pacing therapy to restore a normal heartbeat, preventing sudden cardiac arrest.

Why is an AICD Needed?

An AICD is recommended for patients at risk of serious or life-threatening arrhythmias, such as:

• Ventricular tachycardia (VT)
• Ventricular fibrillation (VF)
• Previous sudden cardiac arrest
• Severe heart failure
• Cardiomyopathy
• High-risk coronary artery disease

How Does an AICD Work?

• The device continuously monitors heart rhythm
• If a dangerous rhythm is detected, it responds by:
  • Delivering a low-energy pacing signal
  • Delivering a high-energy shock (defibrillation)
• This helps restore a normal heart rhythm immediately

Types of AICD Devices

• Single-Chamber ICD: Monitors and treats one chamber (usually ventricle)
• Dual-Chamber ICD: Monitors both atrium and ventricle
• CRT-D (Combined Device): Combines cardiac resynchronization therapy (CRT) with defibrillation

How is AICD Implantation Performed?

• Local anesthesia and sedation are given
• A small incision is made near the collarbone
• Leads are inserted into the heart through veins
• The AICD device is connected and implanted under the skin
• The device is tested and programmed

The procedure usually takes 1–3 hours.

Benefits of AICD

• Prevents sudden cardiac death
• Automatically corrects dangerous arrhythmias
• Provides continuous heart monitoring
• Improves survival in high-risk patients
• Enhances peace of mind

Risks and Complications

Although generally safe, possible risks include:

• Infection at the implant site
• Bleeding or swelling
• Lead displacement
• Inappropriate shocks (rare)
• Device malfunction (rare)

Recovery After AICD Implantation

• Hospital stay: usually 1–2 days
• Resume light activities within a few days
• Avoid heavy lifting for a few weeks
• Regular follow-ups for device checks

Living with an AICD

• Carry a device ID card
• Avoid strong magnetic fields
• Inform doctors before medical procedures
• Follow medication and lifestyle advice
• Most daily activities can be resumed normally