Impaired Subendocardial Wall Thickening and Post-Systolic Shortening Are Signs of Critical Myocardial Ischemia in Patients With Flow-Limiting Coronary Stenosis
-
- Ishizu Tomoko
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba
-
- Seo Yoshihiro
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba
-
- Baba Masako
- Department of Cardiology, Ibaraki Prefectural Central Hospital
-
- Machino Tomoko
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba
-
- Higuchi Haruhiko
- Department of Cardiology, Hitachi General Hospital
-
- Shiotsuka Junji
- Department of Cardiology, Tsukuba Medical Center Hospital
-
- Noguchi Yuichi
- Department of Cardiology, Tsukuba Medical Center Hospital
-
- Aonuma Kazutaka
- Cardiovascular Division, Institute of Clinical Medicine, University of Tsukuba
この論文をさがす
抄録
Background: The early diagnosis of myocardial ischemia is still challenging. The aim of the present study was to determine whether subendocardial hypokinesis and post-systolic contraction could be early markers of myocardial ischemia. Methods and Results: Thirty-one consecutive patients with flow-limiting severe coronary stenosis but without visually abnormal left ventricular wall motion underwent quantitative echocardiography. Myocardial strain was measured using layer-by-layer analysis in severely hypoperfused segments. Radial strain (RS) was measured in the subendocardial, subepicardial, and total wall (innerRS, outerRS, and totalRS, respectively). Circumferential strain (CS) was also measured as 3 separate layers: subendocardial, mid-layer, and subepicardial layers (innerCS, midCS, and outerCS, respectively). Post-systolic shortening (PSS) was defined as the peak strain after end systole, and post-systolic strain index (PSI) was calculated as PSS divided by end-systolic strain. TotalRS was similar between ischemic and normally perfused segments, but innerRS and inner/outer RS ratio were significantly smaller in the ischemic segments than in corresponding segments in healthy subjects. Receiver operating characteristic analysis identified an optimum cut-off for PSI of 0.6. The combined criteria of inner/outer RS ratio <1.0 and PSI >0.6 achieved 95% specificity for the presence of flow-limiting stenosis. Conclusions: Combined assessment of both subendocardial contractile impairment and PSS is very useful in identifying a severely hypoperfused left ventricular wall even without visual wall motion abnormality. (Circ J 2011; 75: 1934-1941)<br>
収録刊行物
-
- Circulation Journal
-
Circulation Journal 75 (8), 1934-1941, 2011
一般社団法人 日本循環器学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282680078887424
-
- NII論文ID
- 10029128048
-
- NII書誌ID
- AA11591968
-
- COI
- 1:STN:280:DC%2BC3MjgtlKqtg%3D%3D
-
- ISSN
- 13474820
- 13469843
-
- PubMed
- 21628833
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- Crossref
- PubMed
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可