洞性不整脈 どうせいふせいみゃく Meanings Noun sinus arrhythmia; irregular heartbeat Kanji 洞 cavern. Read as ドウ. 性 nature. Read as セイ. 不 un- 整 arrange. Read as セイ. 脈 vein. Read as ミャク. Word lists Medicine Jinuma: Japanese Dictionary · Word lists