心しん房ぼうしんぼうFreq.FrequencyTop 50,000Meanings1nounatrium (of the heart)anatomyAnatomical term for the upper chambers of the heart. Used in medical and biological contexts.心しん房ぼうは心しん臓ぞうの上じょう部ぶにある部屋へやです。The atria are the upper chambers of the heart.心しん房ぼう細さい動どうは不ふ整せい脈みゃくの一いっ種しゅです。Atrial fibrillation is a type of arrhythmia.