noun
artificial heart valve
Medical term for a prosthetic device implanted to replace a damaged natural heart valve.
彼は人工心臓弁の手術を受けた。
He underwent surgery for an artificial heart valve.
Compound of 人工 (じんこう, 'artificial') + 心臓 (しんぞう, 'heart') + 弁 (べん, 'valve').