Nuclear Medicine and Molecular Imaging

  • 제42권5호
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  • Pages.362-368
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  • 2008
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  • 1869-3474(pISSN)
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  • 1869-3482(eISSN)
대한핵의학회 (The Korean Society of Nuclear Medicine)
권호 표지

아데노신 부하 1시간 지연 Tc-99m tetrofosmin 게이트 심근 SPECT에서 관찰되는 심장 대 폐 섭취비의 임상적 유용성: 관상동맥조영술과의 비교

The Clinical Efficacy of Lung to Heart Ratio in 1 Hour Delayed Tc-99m Tetrofosmin Gated Myocardial SPECT after Adenosine Stress: Comparison with Coronary Angiography

  • 원경숙 (계명대학교 의과대학 핵의학교실)
  • Won, Kyoung-Sook (Department of Nuclear Medicine, Keimyung University School of Medicine)
  • 발행 : 2008.10.31
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초록

목적: T1-201 심근 SPECT에서 심장 대 폐 섭취비의 증가(LHR)는 심근관류스캔의 고위험소견으로 알려져 있으나, 약물부하 Tc-99m tetrofosmin 게이트 심근 SPECT에서 측정되는 LHR도 같은 역할을 하는지에 대하여는 의문이 있다. 이에 저자는 약물부하 Tc-99m tetrofosmin 게이트 심근 SPECT에서 측정된 LHR과 관상동맥조영술 및 게이트 심근관류 SPECT소견을 비교하여 이의 유용성을 알아보고자 하였다. 대상 및 방법: 관상동맥질환이 의심되어 아데노신 부하 Tc-99m tetrofosmin 게이트 심근 SPECT를 시행한 환자 중 관상동맥조영술을 한 달 이내에 시행한 환자 157명을 대상으로 하였다. 게이트 SPECT는 먼저 휴식기 영상을 얻고, 3-4시간 후 아데노신 부하 영상을 얻었다. 총 157명의 대상환자에서 측정된 LHR과 관상동맥조영슬과 게이트 심근 관류 SPECT 결과를 비교하였다. 결과: 정상 대조군 50명에서 얻은 LHR은 $0.33{\pm}0.04$이었으며, 성별의 차이는 없었다. LHR이 0.41(평균+2표준편차)을 초과한 경우 LHR이 증가된 것으로 간주하였다. 정상관상동맥을 보인 53명 중 2명 (3.8%), 단일혈관질환 44명에서는 0명, 두혈관질환 27명 중 2명(7.4%), 세혈관질환 33명 중 8명(24.2%)에서 증가된 LHR을 보였다. LHR은 부하기 및 휴식기의 좌심실구혈률과 약한 음의 상관관계를 보였으며(r=-0.25, -0.25), 부하기 및 휴식기 관류결손의 총합과는 약한 양의 상관관계를 보였다(r=0.37, 0.36). 결론: 약물부하 후 1시간에 촬영한 Tc-99m tetrofosmin의 LHR은 세혈관질환을 가진 군과 심한 좌심실 기능부전을 가진 군, 그리고 부하기 및 휴식기 영상에서 심한 관류결손을 가진 군에서 높아서, 기존의 T1-201을 이용한 연구와 비슷하였으나, 연관성은 낮았다.

Purpose: It is well known that lung to heart ratio (LHR) is one of the high risk findings in TI- 201 myocardial perfusion SPECT. We evaluated the clinical efficacy of LHR to identify severe coronary artery disease in adenosine stress Tc-99m tetrofosmin gated myocardial perfusion SPECT (gSPECT). Materials and Methods: The study population was 157 patients who underwent both adenosine stress Tc-99m gSPECT and coronary angiography (CAG) within one month. According to the results of CAG and gSPECT LHR and the incidence of increased LHR were compared. Results: Among 53 patients with normal coronary arteries increased LHR was found in 2 patients (3.8%) and 0 in 44 patients (0%) with one vessel disease, 2 in 27 with two vessel disease (7.4%) and 8 in 33 with triple vessel disease (24.2%). Significant differences were found in LHR between subgroups of summed stress score, summed rest score and LV ejection fraction (LVEF). There were weak negative correlation between LHR and LVEF and weak positive correlation between LHR and SSS and SRS. Conclusion: Increased LHR had higher incidence in patients with triple vessel disease, severe LV dysfunction and/or extensive perfusion defect than those of normal group. Although its sensitivity might be low to identify severe coronary artery disease, LHR could be helpful in abnormal myocardial perfusion SPECT to stratify risk and prognosis.

키워드

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