Severe Coronary Tortuosity or Myocardial Bridging in Patients With Chest Pain, Normal Coronary Arteries, and Reversible Myocardial Perfusion Defects

被引:58
|
作者
Gaibazzi, Nicola [1 ]
Rigo, Fausto [2 ]
Reverberi, Claudio [1 ]
机构
[1] Parma Univ Hosp, Div Cardiol, Parma, Italy
[2] Osped Angelo, Div Cardiol, Mestre Venezia, Italy
关键词
DOBUTAMINE STRESS ECHOCARDIOGRAPHY; FRACTIONAL FLOW RESERVE; WALL-MOTION; INTERMEDIATE; ANGIOGRAMS; ACCURACY; DISEASE; LONG;
D O I
10.1016/j.amjcard.2011.05.030
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
We reviewed patients with normal or near-normal coronary angiograms enrolled in the SPAM contrast stress echocardiographic diagnostic study in which 400 patients with chest pain syndrome of suspected cardiac origin with a clinical indication to coronary angiography were enrolled. Patients underwent dipyridamole contrast stress echocardiography (cSE) with sequential analysis of wall motion, myocardial perfusion, and Doppler coronary flow reserve before elective coronary angiography. Ninety-six patients with normal or near-normal epicardial coronary arteries were screened for the presence of 2 prespecified findings: severely tortuous coronary arteries and myocardial bridging. Patients were divided in 2 groups based on the presence (false-positive results, n = 37) or absence (true-negative results, n = 59) of reversible myocardial perfusion defects during cSE and compared for history and clinical and angiographic characteristics. Prevalence of severely tortuous coronary arteries (35% vs 5%, p < 0.001) or myocardial bridging (13% vs 2%, p < 0.05) was 7 times higher in patients who demonstrated reversible perfusion defects at cSE compared to those without reversible perfusion defects. No significant differences were found between the 2 groups for the main demographic variables and risk factors. Patients in the false-positive group more frequently had a history of effort angina (p < 0.001) and ST-segment depression at treadmill electrocardiography (p < 0.001). In conclusion, we hypothesize that patients with a positive myocardial perfusion finding at cSE but without obstructive epicardial coronary artery disease have a decreased myocardial blood flow reserve, which may be caused by a spectrum of causes other than obstructive coronary artery disease, among which severely tortuous coronary arteries/myocardial bridging may play a significant role. (C) 2011 Elsevier Inc. All rights reserved. (Am J Cardiol 2011;108:973-978)
引用
收藏
页码:973 / 978
页数:6
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