MyHealth Login    |    Bill Pay    |    Classes & Events         

Health Encyclopedia - Disease

Search Health Information   

 

Ventricular tachycardia

Definition

Ventricular tachycardia (VT) is a rapid heartbeat that starts in the ventricles.

Alternative Names

Wide-complex tachycardia; V tach; Tachycardia - ventricular

Causes, incidence, and risk factors

Ventricular tachycardia is a pulse rate of more than 100 beats per minute, with at least three irregular heartbeats in a row.

The condition can develop as an early or late complication of a heart attack. It may also occur in patients with:

Ventricular tachycardia can occur without heart disease.

Scar tissue may form in the muscle of the ventricles days, months, or years after a heart attack. This can lead to ventricular tachycardia.

Ventricular tachycardia can also be caused by:

  • Anti-arrhythmic medications
  • Changes in blood chemistry (such as a low potassium level)
  • Changes in pH (acid-base)
  • Lack of enough oxygen

"Torsade de pointes" is a form of ventricular tachycardia that is often due to congenital heart disease or the use of certain medications.

Symptoms

If the heart rate during a ventricular tachycardia episode is very fast or lasts longer than a few seconds. There may be symptoms such as:

Note: Symptoms may start and stop suddenly. In some cases, there are no symptoms.

Signs and tests

Signs include:

  • Absent pulse
  • Loss of consciousness
  • Normal or low blood pressure
  • Rapid pulse

Ventricular tachycardia may be seen on:

Blood chemistries and other tests may be done.

Treatment

Treatment depends on the symptoms, and the type of heart disorder. Some people may not need treatment.

If ventricular tachycardia becomes an emergency situation, it may require:

  • CPR
  • Electrical defibrillation or cardioversion (electric shock)
  • Anti-arrhythmic medications (such as lidocaine, procainamide, sotalol, or amiodarone) given through a vein

Long-term treatment of ventricular tachycardia may require the use of oral anti-arrhythmic medications (such as procainamide, amiodarone, or sotalol). However, anti-arrhythmic medications may have severe side effects. Their use is decreasing in favor of other treatments.

Some ventricular tachycardias may be treated with an ablation procedure. Radiofrequency catheter ablation can cure certain tachycardias.

A preferred treatment for many chronic (long-term) ventricular tachycardias consists of implanting a device called implantable cardioverter defibrillator (ICD). The ICD is usually implanted in the chest, like a pacemaker. It is connected to the heart with wires.

The doctor programs the ICD to sense when ventricular tachycardia is occurring, and to administer a shock to stop it. The ICD may also be programmed to send a rapid burst of paced beats to interrupt the ventricular tachycardia. You may need to take anti-arrhythmic drugs to prevent repeated firing of the ICD.

Expectations (prognosis)

The outcome depends on the heart condition and symptoms.

Complications

Ventricular tachycardia may not cause symptoms in some people. However, it may be lethal in other people. It is a major cause of sudden cardiac death.

Calling your health care provider

Go to the emergency room or call the local emergency number (such as 911) if you have a rapid, irregular pulse, faint, or have chest pain. All of these may be signs of ventricular tachycardia.

Prevention

In some cases, the disorder is not preventable. In other cases, it can be prevented by treating heart diseases and correcting blood chemistries.

References

Olgin JE, Zipes DP. Specific Arrhythmias: Diagnosis and Treatment. In: Libby P, Bonow RO, Mann DL, Zipes DP. Libby: Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 35.

Epstein AE, DiMarco JP, Ellenbogen KA, Estes NA 3rd, Freedman RA, Gettes LS, et al. ACC/AHA,HRS 2008 Guidelines for Device-Based Therapy of Cardiac Rhythm Abnormalities: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the ACC?AHA/NASPE 2002 Guideline Update for Implantation of Cardiac Pacemakers and Antiarrhythmia Devices): developed in collaboration with the American Association for Thoracic Surgery and Society of Thoracic Surgeons. Circulation. 117:e350-e408.


Review Date: 6/7/2012
Reviewed By: Glenn Gandelman, MD, MPH, FACC Assistant Clinical Professor of Medicine at New York Medical College, and in private practice specializing in cardiovascular disease in Greenwich, CT. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
adam.com
 
 
  Phone Directory Contact Us Alegent Creighton Health Blog Like Alegent Creighton Health on Facebook Follow Alegent Creighton Health on Twitter Alegent Creighton Health YouTube Channel LinkedIn Alegent Creighton Health RSS Feeds Alegent Creighton Health Mobile  
 
  SITE INFORMATION
Catholic Health Initiatives
Contact Us
Feedback
Patient Privacy Notice
Site Map
Terms of Use
Website Privacy
LOCATIONS
Alegent Creighton Clinic
Alegent Creighton Health Quick Care
Bergan Mercy Medical Center
Community Memorial Hospital
Creighton University Medical Center
Immanuel Medical Center
Lakeside Hospital
Lasting Hope Recovery Center
Memorial Hospital - Schuyler
Mercy Hospital
Mercy Hospital - Corning, IA
Midlands Hospital
Plainview Hospital
RESOURCES
Appointments
Baby Photos
Bill Pay
Classes & Events
Employees
eNewsletter
Find a Physician
Health Information
Health News
Jobs
Mobile
My Cost
News Center
Vendor Information
MEDICAL SERVICES
Back & Spine
Cancer
Children's Health
Emergency Departments
Heart & Vascular
Maternity
Mental Health
Neuroscience
Orthopedics
Pharmacy
Physical Rehabilitation
Senior Services
Weight Management
Women's Health
PATIENT AND VISITOR INFORMATION
Advance Directives
Awards and Recognition
Contáctenos
Español
Faith at Alegent Creighton
Financial Assistance
Gift Shops
Language Access
Pastoral Care
Patient Rights
Patients & Visitors

Make a Donation to Alegent Creighton Health

© 2013 Alegent Creighton Health. All rights reserved