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Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment

Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment - Dogs Health care Articles

Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment : Dogs Health care Articles; Sinus bradycardia is a kind of abnormal heart rhythm which is indicated by a slower rate of impulses (than normal) in the sinus node. " src="http://www.vetarena.com/gallery/image-1010.m.jpg" /> Also called the sinoatrial node (SAN), the sinus node starts the electrical impulses within the heart, causing the heart to beat or contract. ... Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment


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Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment

Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment

Sinus bradycardia is a kind of abnormal heart rhythm which is indicated by a slower rate of impulses (than normal) in the sinus node. Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment Also called the sinoatrial node (SAN), the sinus node starts the electrical impulses within the heart, causing the heart to beat or contract. In most examples, slow sinus electrical impulses is benign and may even be beneficial; however, it can also cause loss of consciousness if it is brought about by an underlying disease that disrupts the cardiac autonomic nerves, which act as the heart's control system.
  • Sinus bradycardia is fairly common in dogs, especially breeds such as :
  • cocker spaniels
  • dachshunds
  • pugs
  • West Highland white terriers
  • miniature schnauzers
In addition, this condition is more common in younger dogs, with the incidence decreasing with age, unless it is being caused by an underlying disease.

Definition:
Sinus bradycardia : Refers to heartbeats slower than 60 beats per minute, although depends on the animal's environment and size.


Symptoms of Sinus bradycardia

Your dog may show no sign if it very active or engaging in athletic life. Typically, the sinus bradycardia is most common when your dog is at rest. Some other common symptoms associated with sinus bradycardia include:
  • Exercise intolerance
  • Seizures
  • Loss of consciousness
  • Lethargy
  • Episodic muscle incoordination (ataxia)
  • Excessively slow breathing (hypoventilation), (especially under anesthesia)

Diagnosis

A complete physical test will be performed on your dog, considering the background history of signs, your dog's overall condition, and possible incidents that might have led to this condition.

A thorough blood profile will be performed, including a chemical blood profile, a complete blood count, and a urinalysis -- the results of which may indicate the presence of substances that might be causing a slowed heart rate. These tests will also reveal deficiencies in the blood if that is the underlying cause. They also may offer clues to possible kidney failure. Your doctor can also use X-rays and ultrasound to visually examine your dog's internal organs for abnormalities in the heart, kidney and other organs. An electrocardiogram (EKG) recording can be used to examine the electrical currents in the heart muscles, and may reveal any abnormalities in cardiac electrical conduction, which underlies the heartís ability to contract and beat. An initial 24-hour heart monitoring may be indicated to conclude a diagnosis.


Treatment of Sinus bradycardia

Treatment depends on any underlying disease that exists. Many dogs show no clinical symptoms and need no treatment. In dogs without structural heart disease, heart rates as low as 40 to 50 bpm (beats per minute) are still generally able to provide normal cardiac output at rest. Therapeutic approaches vary markedly; they depend on whatís causing the SB, the ventricular rate, and the severity of clinical signs.

If your dog is in critical condition, it may be treated as an inpatient, where intravenous fluid therapy can be administered and the dog's health stabilized. Restrictions on activity will not be recommended unless your dog has symptomatic SB that is related to structural heart disease; then exercise restriction will be recommended until medical and/or surgical intervention can stabilize the problem.

Causes of Sinus bradycardia

Possible causes may include :
  • Sleep
  • Oversedation
  • Athletic conditioning (this is not uncommon in athletic dogs)
  • Hypothermia
  • Intubation
  • Underlying disease(s); e.g., respiratory, neurologic, and gastronintestinal diseases

Home Care of Sinus bradycardia

You will need to monitor your dog based and it depends on the conditions that it may has. Symptoms should resolve with correction of the causative underlying condition. However, the overall long term prognosis varies with the nature of the structural heart disease, if there is one present. For example, treatment of symptomatic Sinus bradycardia with a permanent pacemaker generally offers a good prognosis for rhythm control.

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Source :
- Some Parts are taken from PetMD.com

Sinus Bradycardia in Dogs Symptoms , Diagnosis and Treatment

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