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Dr. Srinivasan

Interventional Cardiologist

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Fluoroscopy and Imaging Expertise
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Coronary Artery Bypass Grafting (CABG)
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Atrial Fibrillation with Slow Heart Rate
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Congestive Heart Failure (CHF)
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Pace Maker

A pacemaker is a small medical device that helps regulate the heart’s rhythm. It is typically implanted under the skin near the collarbone and is used to treat conditions where the heart beats too slowly, irregularly, or fails to maintain a proper rhythm. The pacemaker sends electrical impulses to the heart to help it beat at a normal rate.

Types of Pacemakers
  • Single-Chamber Pacemaker: This type is used when only one chamber of the heart needs assistance, usually the right ventricle. It has one lead (wire) that connects the device to the heart.
  • Dual-Chamber Pacemaker: This type helps both the atria and ventricles work together by using two leads, one for the right atrium and one for the right ventricle. It is used when there is a delay in the heart’s electrical signals between the chambers.
  • Biventricular Pacemaker (also called Cardiac Resynchronization Therapy (CRT)): This type is used in patients with heart failure, helping both ventricles beat in sync to improve the heart’s efficiency and output. It typically involves three leads—one in the right atrium, one in the right ventricle, and one in the left ventricle.
  • Leadless Pacemaker: A newer, smaller device that is implanted directly into the heart, eliminating the need for leads or wires. It is typically used for patients who need only a single-chamber pacemaker

Indications and Working of a Pacemaker

A pacemaker is typically used for bradycardia (slow heart rate), heart block (delayed electrical signals), atrial fibrillation (leading to slow heart rates), and congestive heart failure (to synchronize heart contractions). It consists of a pulse generator and leads, which send electrical impulses to regulate the heart’s rhythm. Modern pacemakers adjust the heart rate based on physical activity using sensors, ensuring the heart meets the body’s needs.

The implantation procedure involves making a small incision, inserting leads into the heart, and placing the pulse generator under the skin. Post-procedure, patients must avoid intense physical activity and attend regular follow-ups. Risks include infection, lead displacement, and battery replacement every 5-15 years. With proper care, patients can resume daily activities, improving quality of life.                                                                                              

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