A 4-year old male miniature schnauzer with severe pulmonic stenosis was presented for percutaneous balloon valvuloplasty. The dog had been managed medically with atenolol for a month prior to the procedure. Clinical examination was unremarkable except for auscultation of a grade V/VI left-sided systolic murmur. The dog was premedicated with pethidine. Anaesthesia was induced using diazepam and etomidate and maintained using sevoflurane in oxygen. Angiography was uneventful, but when the guidewire was threaded through the right side of the heart to allow insertion of the balloon catheter, marked desaturation with visible cyanosis developed. This resolved on withdrawal of the guidewire and catheter but recurred each time the guidewire and catheter were repositioned. Balloon valvuloplasty was eventually successful in reducing the pressure gradient across the stenotic valve from 102 to 52 mmHg. Hypoxaemia did not recur during recovery and the dog was discharged the following day.
- right to left shunt
- balloon valvuloplasty
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Contributors All the authors made substantial contributions. IP and PJM: anaesthetic management of the case. IP: preparation and writing of the manuscript. PP, PJM and HRMcD: reviewed and approved the final version of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data availability statement There are no data in this work.
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