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Treating Syncope: Helping Your Heart

Syncope is a medical term for fainting or passing out. If your fainting was caused by a heartbeat problem (arrhythmia) or other heart problem, treatment may improve blood flow, prevent syncope, and help prevent more heart problems. Some of these treatments are discussion below. Your healthcare provider can explain the benefits and risks of each treatment.

Pacemaker or ICD

These devices can help speed up or slow down your heartbeat. They are implanted under the skin in the chest during a simple surgery. Once you have a pacemaker or an ICD, you will need to follow up with your provider at regular intervals to be sure your device is working properly and to monitor your heart rhythm.

A pacemaker

A pacemaker can prevent your heart from beating too slowly. When needed, the pacemaker sends an electrical impulse to the heart, telling it to beat faster (at a minimum rate).

Outline of man's chest showing pacemaker in chest with leads going into heart chambers.
A pacemaker in place. (An ICD looks similar and is implanted in the same area of the body.)


An ICD (implantable cardioverter defibrillator) treats fast, dangerous heart rhythms. It can either rapidly pace the heart to override the abnormal rhythm, or send 1 or more brief shocks to the heart to restore normal heart rhythm in a matter of seconds. An ICD can also act as a pacemaker if needed to help support a slow heart rate. 

Other treatments

In some cases, your doctor may suggest a procedure or surgery. These can be a long-term solution for certain heart problems: 

Catheter ablation

Catheter ablation treats a fast heartbeat by locating and destroying abnormal circuits using either heat or cold therapy. This is a non-surgical procedure. It involves threading thin wires (catheters) through a vein in the leg and guiding it to the heart. The wires are used to find the location of the abnormal circuit(s) and destroy those cells.

Heart valve surgery

Valve surgery may be an option if syncope is caused by an abnormal heart valve. Most often, severe narrowing of the aortic valve is the cause of syncope. This is the valve that opens to let blood out to your body. The valve is replaced with a new healthy valve (either mechanical or prosthetic). This can restore normal blood flow through the heart and prevent syncope. If you need a valve replacement, you will be evaluated by a multidisciplinary heart valve team who can help you determine which procedure is best for your condition.

Septal alcohol ablation or surgical septal myectomy

In some people, blood can't leave the heart because the muscle becomes enlarged or thickened (hypertrophied) along one of the ventricle walls (septum). For some people, medicine can relax this area of the heart and blood can move out to the body. In others, the tract through the heart is too narrow and blood still can't get out to the body or to the brain and this can cause syncope. Using a catheter or open surgery, your doctor can thin out the muscle and improve blood flow.

Coronary stents or bypass surgery

When the arteries feeding the heart muscle become very narrowed it can cause a heart attack and irregular heart rhythms. This can affect blood pressure and circulation of oxygen and blood to the brain and may cause syncope. By restoring blood flow to the heart muscle the blood pressure and circulation to the brain and all parts of the body improves. If you have coronary artery disease, you may need these blockages treated with stents, small mesh tubes that fit inside the blood vessels to keep blood flow open to the artery. Or you may need surgery to bypass around the blocked or narrowed arteries. In some cases, these procedures are planned or may be done as an emergency treatment for a heart attack or acute myocardial infarction (AMI). 

To know what treatment is best for you, you will need testing. Until you have a treatment plan, don't do activities that could result in injury to yourself or others if you were to faint. Ask your healthcare provider when it will be safe for you to resume driving, or other activities for work or recreation.

Online Medical Reviewer: Anne Clayton APRN
Online Medical Reviewer: Lu Cunningham RN BSN
Online Medical Reviewer: Steven Kang MD
Date Last Reviewed: 8/1/2019
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