title: Evaluation of Left and Right Atrial Function in Patients with Coronary Slow-Flow Phenomenon Using Two-Dimensional Speckle Tracking Echocardiography.
abstract: BACKGROUND
  Coronary slow-flow phenomenon (CSFP) is an angiographic diagnosis characterized by delayed coronary opacification in the absence of obstructive coronary artery disease. Currently, several investigators are focusing on ventricular function assessment in patients with CSFP; however, there is a paucity of data on their atrial function. This study was performed to evaluate left atrial (LA) and right atrial (RA) function in patients with CSFP.
  
  
  METHODS
  Eighty-two patients with CSFP and 55 controls without CSFP were enrolled in the study. Diagnosis of CSFP was made by thrombolysis in myocardial infarction frame count (TFC). The LA and RA global longitudinal strain and strain rate during systole (Ss, SRs), during early diastole (Se, SRe), and during late diastole (Sa, SRa) were measured using two-dimensional speckle tracking echocardiography.
  
  
  RESULTS
  In the CSFP group, LA Se and SRe decreased, while LA Sa and SRa increased, compared with the control group. RA Se and SRe were lower in patients with CSFP than in the controls.
  
  
  CONCLUSIONS
  LA conduit function decreased in patients with CSFP, while contractile function increased. RA conduit function also decreased in patients with CSFP.
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Yonghuai
authors: Y
authors: Wang
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.|Department of Ultrasound, Shengjing Hospital of China Medical University, Shenyang, China.
authors: Yan
authors: Y
authors: Zhang
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Chunyan
authors: C
authors: Ma
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Zhengyu
authors: Z
authors: Guan
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Shuang
authors: S
authors: Liu
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Weixin
authors: W
authors: Zhang
authors: Department of Cardiology, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Yuling
authors: Y
authors: Li
authors: Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, Liaoning, China.
authors: Jun
authors: J
authors: Yang
mesh_terms: D016275:Atrial Function; D003324:Coronary Artery Disease / Q000150:complications / Q000000981:diagnostic imaging / Q000503:physiopathology*; D004452:Echocardiography / Q000379:methods*; D054459:Elasticity Imaging Techniques / Q000379:methods*; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*
keywords: atrium; coronary artery; echocardiography; strain and strain rate