A Case of Acute Myocardial Infarction with Resolution of ST-Segment Elevation Immediately after Ventricular Defibrillation

심실 제세동 직후 ST 분절 상승이 소실된 급성심근경색 1예

  • Cho, Sung-Kyun (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Kang, Yoon-Jung (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Kim, Tae-Hoon (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Lee, Hye-Young (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Cho, Sung-Woo (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Hwang, Mee-Won (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine) ;
  • Byun, Young-Sup (Division of Cardiology, Department of Internal Medicine, Sanggye-Paik Hospital, Inje University College of Medicine)
  • 조성균 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 강윤정 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 김태훈 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 이혜영 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 조성우 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 황미원 (인제대학교 의과대학 상계백병원 내과학교실 심장내과) ;
  • 변영섭 (인제대학교 의과대학 상계백병원 내과학교실 심장내과)
  • Published : 2011.06.01

Abstract

A 38-year-old man presented with typical squeezing-type anterior chest pain. An initial electrocardiogram (ECG) showed prominent ST-segment elevation (V1-V4 lead, 3 mm). Suddenly, the patient fell unconscious and had no pulse. At that time, the ECG showed polymorphic ventricular fibrillation (VT). After direct current (DC) cardioversion, the patient regained vital signs and defibrillation converted the VT into an accelerated idioventricular rhythm with resolution of the ST-segment elevation. The patient was referred to our hospital for close observation and further evaluation. At our hospital, an ECG showed normal sinus rhythms and cardiac enzymes were within normal limits. We diagnosed the patient with variant angina rather than ST elevation myocardial infarction (STEMI), because his clinical manifestations were quite distinct; ST-segment elevations disappeared slowly at the reperfusion stage. However, the patient's final diagnosis was STEMI because coronary angiography showed severe eccentric tubular stenosis (85%) with remnant thrombus in the middle left anterior descending artery. Defibrillation likely removed the thrombus, which led to STEMI.

본 증례는 최초 ST 분절 상승 급성심근경색이 발생하였고, 이후 심실세동 및 의식 소실이 발생하였으나 제세동 실시 직후 의식 회복과 흉통 및 ST 분절의 상승이 사라졌으며 내원 당시 시행한 심근 효소의 상승도 관찰되지 않았던 환자였다. 이는 일반적으로 폐쇄된 관상동맥의 재관류 시 보이는 임상상과 다른 양상을 보였던 사례로 최초 내원 시 이형 협심증에 의한 심근 경색의 가능성이 높다고 판단하였던 환자였다. 하지만 이후 임상경과 및 관상동맥 조영술상 중위부 좌전하행지에 협착 및 잔류 혈전이 관찰되었다. 이에 저자들은 최초 급성심근경색을 유발하였던 관상동맥 내 혈전이 제세동에 의해 제거되어 이형협심증의 임상양상을 보였던 사례를 경험하였기에 보고하는 바이다.

Keywords

References

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