Coronary Artery and Cardiac Disease in Patients With Type 2 Myocardial Infarction: A Prospective Cohort Study

被引：50

作者：

Bularga, Anda ^{[1
]}

Hung, John ^{[1
]}

Daghem, Marwa ^{[1
]}

Stewart, Stacey ^{[1
,2
]}

Taggart, Caelan ^{[1
]}

Wereski, Ryan ^{[1
]}

Singh, Trisha ^{[1
]}

Meah, Mohammed N. ^{[1
]}

Fujisawa, Takeshi ^{[1
]}

Ferry, Amy V. ^{[1
]}

Chiong, Justin ^{[1
]}

Jenkins, William S. ^{[1
]}

Strachan, Fiona E. ^{[1
]}

Semple, Scott

van Beek, Edwin J. R. ^{[2
]}

Williams, Michelle ^{[1
,2
]}

Dey, Damini ^{[4
]}

Tuck, Chris ^{[1
]}

Baker, Andrew H. ^{[1
]}

Newby, David E. ^{[1
]}

Dweck, Marc R. ^{[1
]}

Mills, Nicholas L. ^{[1
,3
]}

Chapman, Andrew R. ^{[1
]}

机构：

[1] Univ Edinburgh, BHF Ctr Cardiovasc Sci, Chancellors Bldg, Edinburgh EH16 4SA, Midlothian, Scotland

[2] Univ Edinburgh, Edinburgh Imaging, Edinburgh, Midlothian, Scotland

[3] Univ Edinburgh, Usher Inst, Edinburgh, Midlothian, Scotland

[4] Cedars Sinai Med Ctr, Biomed Imaging Res Inst, Los Angeles, CA 90048 USA

来源：

CIRCULATION | 2022年 / 145卷 / 16期

基金：

英国医学研究理事会; 英国惠康基金;

关键词：

cardiac imaging techniques; echocardiography; magnetic resonance imaging; myocardial infarction; HIGH-SENSITIVITY TROPONIN; SCCT GUIDELINES; CT ANGIOGRAPHY; OUTCOMES; SOCIETY; PLAQUE; CLASSIFICATION; DEFINITION; MORTALITY; INJURY;

D O I：

10.1161/CIRCULATIONAHA.121.058542

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

BACKGROUND: Type 2 myocardial infarction is caused by myocardial oxygen supply-demand imbalance, and its diagnosis is increasingly common with the advent of high-sensitivity cardiac troponin assays. Although this diagnosis is associated with poor outcomes, widespread uncertainty and confusion remain among clinicians as to how to investigate and manage this heterogeneous group of patients with type 2 myocardial infarction. METHODS: In a prospective cohort study, 8064 consecutive patients with increased cardiac troponin concentrations were screened to identify patients with type 2 myocardial infarction. We excluded patients with frailty or renal or hepatic failure. All study participants underwent coronary (invasive or computed tomography angiography) and cardiac (magnetic resonance or echocardiography) imaging, and the underlying causes of infarction were independently adjudicated. The primary outcome was the prevalence of coronary artery disease. RESULTS: In 100 patients with a provisional diagnosis of type 2 myocardial infarction (median age, 65 years [interquartile range, 55-74 years]; 43% women), coronary and cardiac imaging reclassified the diagnosis in 7 patients: type 1 or 4b myocardial infarction in 5 and acute myocardial injury in 2 patients. In those with type 2 myocardial infarction, median cardiac troponin I concentrations were 195 ng/L (interquartile range, 62-760 ng/L) at presentation and 1165 ng/L (interquartile range, 277-3782 ng/L) on repeat testing. The prevalence of coronary artery disease was 68% (63 of 93), which was obstructive in 30% (28 of 93). Infarct-pattern late gadolinium enhancement or regional wall motion abnormalities were observed in 42% (39 of 93), and left ventricular systolic dysfunction was seen in 34% (32 of 93). Only 10 patients had both normal coronary and normal cardiac imaging. Coronary artery disease and left ventricular systolic dysfunction were previously unrecognized in 60% (38 of 63) and 84% (27 of 32), respectively, with only 33% (21 of 63) and 19% (6 of 32) on evidence-based treatments. CONCLUSIONS: Systematic coronary and cardiac imaging of patients with type 2 myocardial infarction identified coronary artery disease in two-thirds and left ventricular systolic dysfunction in one-third of patients. Unrecognized and untreated coronary or cardiac disease is seen in most patients with type 2 myocardial infarction, presenting opportunities for initiation of evidence-based treatments with major potential to improve clinical outcomes.

引用

页码：1188 / 1200

页数：13

共 39 条

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