Petcardia - Veterinary Cardiology in Colorado
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Supraventricular Tachycardia

​A normal heartbeat starts with an electrical impulse originating within sinoatrial (SA) node, also called the pacemaker node, in the right atrium (upper chamber of the heart). This impulse causes contraction of both atria which pushes blood to the ventricles (larger lower chambers of the heart). The electrical impulse then reaches the atrioventricular (AV) node signaling both ventricles to contract pushing blood to the lungs and out to the body. Supraventricular tachycardia (SVT) occurs when rapid electrical impulses are generated outside the SA node causing a fast heart rate. This can occur in the heart muscle of the atria or within the AV node. The rapid impulses may occur periodically or be sustained for long periods of time causing damage to the heart.

Symptoms

​Supraventricular tachycardia occurring in periodic short bursts may not cause any symptoms. Long periods of SVT with a high heart rate can cause heart muscle damage and congestive heart failure (CHF). Symptoms include weakness, lethargy, collapse, fainting, labored breathing, coughing and sudden death.

Diagnoses

An electrocardiogram (ECG) should be performed to look at the electrical activity of the heart. If SVT is diagnosed an ultrasound of the heart (echocardiogram) should also be done to assess at the structure and function within the heart. Chest x-rays may also be indicated if the pet is suspected to be in CHF.

Treatment

​Cases of sustained SVT may need to be hospitalized. An IV catheter will be placed and injectable antiarrhythmic therapy started. The pet will be placed on continuous ECG monitoring until the arrhythmia is under control with oral anti-arrhythmic medications. Once the arrhythmia is under control, serial rechecks will be needed to assess the heart rhythm for adequate control of the arrhythmia. A holter monitor may be suggested to look at the heart rate over a 24-hour period. A Holter monitor is a small ECG device that is place on the pet, they can then go about their day at home while the device records their ECG. The results are then analyzed and medication adjustments can be made.
Click here to download a PDF on Supraventricular Tachycardia
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Southern Colorado
5886 Tutt Blvd.
​Co. Springs, CO 80923
719-602-7800​
South Denver
​774 Maleta Ln

​Castle Rock, CO 80108
720-724-8013
Denver
10140 West 44th Ave.
​Wheat Ridge, CO 80033
720-724-8010
North Denver
​
2000 W S. Boulder Rd.
​Lafayette, CO 80026
720-724-8012
Northern Colorado
227 W. 67th Ct.
Loveland, CO 80538
970-775-8002
©2020 Petcardia Veterinary Cardiology, LLC ​All Rights Reserved.
  • Petcardia
    • The Petcardia Team >
      • Our Doctors >
        • Dr. Amy Dixon-Jimenez
        • Dr. Allison Heaney
        • Dr. Kendra LaFauci
        • Dr. Samantha Salmon
        • Dr. Marta Karn
      • Our Cardiology Technicians >
        • Beth
        • Bryce
        • Chelsea
        • Jackie
        • Jessica
        • Jocelyn
        • Karinna
        • Lauren
        • Lexus
        • Morgan
        • Nicole
        • Patti
        • Rachel
  • For Clients
    • Testimonials
    • Forms >
      • New Client Information Form
      • Diet History Form
    • Client Education >
      • Videos
      • Heart Conditions
    • Petcardia Pharmacy
    • Care Credit
    • Scratch Pay
    • Review >
      • Petcardia Feedback
  • For Veterinarians
    • Veterinary Referral Form
    • Continuing Education
    • Cardiology CE Sign
    • Careers
  • Locations
  • More
    • DCM >
      • DCM Clinical Trial
      • Nutritional DCM Infograph
      • DCM Patient Review
    • Love Like Harley