洞どう不ふ全ぜん症しょう候こう群ぐんどうふぜんしょうこうぐんMeanings1nounsick sinus syndrome; sinus node dysfunctionmedicine›Medical term for a group of heart rhythm disorders caused by malfunction of the sinus node. Often abbreviated as SSS.洞どう不ふ全ぜん症しょう候こう群ぐんの患