A?10-year-old female Papillon and a?1-year-old male Golden Retriever were presented to?the Tokyo University of?Agriculture and Technology for?a?second opinion on an?aortic valve stenosis (AS). The?aortic flow rate was?not as?high as?it should have been (the aortic flow velocity for?case?1 and case?2 was?2.82?m/s and 3.96?m/s, respectively). However, the?AS was?suspected to?be an?exacerbating factor in?the congestive heart failure, so that?a?balloon valvuloplasty was?conducted. As?a?result, the?congestion and clinical symptoms were much improved in?both cases. In?conclusion, in?cases with an?AS, in?which afterload is a?key factor for?the exacerbation of?the congestion, a?balloon aortic valvuloplasty may reduce the?afterload and consequently lead to?an?improvement in?the congestion.
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