Cardiology

Research Abstract

C21 - Phrenic Nerve Palsy Following Mitral Valve Repair in Dogs

Friday, June 15
4:30 PM - 4:45 PM
Location: WSCC 613/614

Phrenic nerve palsy (PNP) is one of the complications of open chest surgery. The aim of the present retrospective study was to evaluate the incidence of PNP after mitral valve repair in dogs.  


In total, 284 dogs underwent mitral valve repair. PNP was diagnosed using inspiratory chest radiographs (dorsal–ventral) on the day after surgery. In these cases, the left diaphragm was raised by more than 1 interval from the right diaphragm, and signs of respiratory distress and effort respiration were also observed. We assessed the incidence of PNP, the recovery time, and the relationship between the occurrence of PNP and the survival rate, occurrence of respiratory failure, the aortic cross-clamping time during surgery.


PNP was diagnosed in 87 cases (30.6%) on the day after surgery, 63 cases (22.2%) at the time of discharge from the hospital at 1 week after surgery, 24 cases (8.5%) at the 1-month postoperative examination, and one case (0.4%) at the 3-month postoperative examination. PNP developed in nine of the 21 patients who died in the hospital and nine of the 10 patients who died because of respiratory insufficiency (p = 0.001). The occurrence of PNP was not associated with the aortic cross-clamping time.


Our findings suggest that the incidence of PNP after mitral valve repair is high in dogs, although the recovery time is shorter than that in humans. PNP alone does not affect the prognosis; however, it is a postoperative risk factor in cases exhibiting respiratory disease.


 


 

Kazuya Mamada, DVM

Physician
JASMINE Veterinary Cardiovascular Medical Center

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C21 - Phrenic Nerve Palsy Following Mitral Valve Repair in Dogs

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