Equis ISSN 2398-2977

Heart: sinus tachycardia

Contributor(s): Karen Blissitt, Christopher Brown, Wendy Furness, Lesley Young

Introduction

  • Occurs when sympathetic discharge increases and parasympathetic discharge decreases.
  • Cause: a normal physiological response to maintain blood pressure, or increase cardiac output.
  • Signs: resting heart rate persistently above 60 bpm.
  • Diagnosis: ECG.
  • Treatment: depends upon inciting cause, usually normal physiologic response to increased demands.
  • Prognosis: dependent on cause.

Pathogenesis

Etiology

  • May result from pain, fear, exercise or cardiovascular compromise.
  • Seen in cases of hypovolemia (hemorrhage, shock), electrolyte imbalance, pyrexia or anemia.
  • Seen in horses with congestive cardiac failure   Heart: disease - overview  (rare).

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers


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