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Published on: March 17, 2023
Tricuspid valve chordal rupture in a dog with pulmonary hypertension
1Midorigaoka Animal Clinic, 19-1, Midorigaoka, Kashiwa-shi, Chiba 277-0082, Japan.
Background:
Rupture of the chordae tendineae of the tricuspid valve is rare in dogs. We report the case of a dog with tricuspid valve chordal rupture secondary to pulmonary hypertension.
Case Description:
A 7.7-kg, 13-year-old neutered male Pekingese on annual heartworm prevention presented with respiratory distress. The patient received a diagnosis of pulmonary hypertension and received medical treatment. However, the patient re-presented 405 days post-diagnosis with dyspnea and an increased abdominal circumference. Transthoracic echocardiography showed ruptured chordae tendineae of the tricuspid valve, and abdominal ultrasound identified significant ascites associated with worsening right congestive heart failure. The patient improved after draining ascitic fluid and extra medical treatment, but was released with poor prognosis.
Conclusion:
Ruptured chordae tendineae of the tricuspid valve should be considered in patients with pulmonary hypertension.
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Heart Valves
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...

