12비트 미만의 HRR로 정의된 블론드 HRR의 비율은 관상 동맥 경련이 없는 환자보다 VA 환자가 훨씬 높았다.
The proportion of blunted HRR, which was defined as HRR less than 12 beats, was significantly higher in patients with VA than in those without coronary artery spasm.