洞どう性せい不ふ整せい脈みゃくMeaningsNoun1. sinus arrhythmia; irregular heartbeatKanji used洞cave性nature (of a person)不negative整put in order脈veinComposed of洞どうsinus; cavity; antrum; neighborhood (administrative division in North Korea)Noun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun不ふ整せい脈みゃくarrhythmia; abnormal heartbeatNoun