title: Right ventricular strain and strain rate properties in patients with right ventricular myocardial infarction.
abstract: BACKGROUND
  This study was planned to assess strain and strain rate properties of right ventricle in patients with RV myocardial infarction.
  
  
  METHODS
  Thirty patients with acute inferior myocardial infarction were included in this study. The presence of right ventricular infarction in association with an inferior myocardial infarction was defined by an ST-segment elevation 0.1 mV in lead V4 R. According to this definition, 15 patients had electrocardiographic signs of inferior myocardial infarction without right ventricular infarction (group I), and 15 patients had electrocardiographic signs of inferior myocardial infarction with right ventricular infarction (group II). Echocardiography was performed using a Vivid 5 System (GE Ultrasound; Horten, Norway) and a 2.5-MHz transducer. 2-dimensional color doppler myocardial imaging (CDMI) data for longitudinal function were recorded from the RV free wall using standard apical view. Offline analysis of the myocardial color Doppler data for regional velocity (V), strain rate (Sr), and strain (S) curves was performed using a special software program (EchoPac 6.4 Vingmed, Horten, Norway). They were assessed in basal, middle and apical segments of the RV. The differences between different groups were assessed with the Mann-Whitney U-test. A value of P < 0.05 was considered statistically significant.
  
  
  RESULTS
  Systolic tissue velocity, strain, strain rate of basal (4.8 +/- 0.8 cm/s vs 6.5 +/- 1.2 cm/s, -12 +/- 3% vs -24 +/- 5%, 1.28 +/- 0.3/s vs -1.9 +/- 0.4/s; P < 0.001, <0.001, <0.001, respectively) and mid (4.2 +/- 0.5 cm/s vs 5.4 +/- 0.5 cm/s, -16 +/-3% vs -26 +/- 4%, -1.2 +/- 0.3/s vs -2.1 +/- 0.3/s; P < 0.001, <0.001, <0.001, respectively) segments of right ventricle were significantly lower in patients with RV infarction than in patients without RV infarction. There were no differences between groups for apical strain, strain rate, and systolic tissue velocity.
  
  
  CONCLUSIONS
  This study demonstrates that right ventricular strain and strain rate were lower in patients with left ventricular inferior wall myocardial infarction with, compared to without, right ventricular infarction.
authors.affiliation: Department of Cardiology, Medical School Hospital, Ataturk University, Erzurum, Turkey. drserdarsevimli@hotmail.com
authors.forename: Serdar
authors.initials: S
authors.lastname: Sevimli
authors.forename: Fuat
authors.initials: F
authors.lastname: Gundogdu
authors.forename: Enbiya
authors.initials: E
authors.lastname: Aksakal
authors.forename: Sakir
authors.initials: S
authors.lastname: Arslan
authors.forename: Hakan
authors.initials: H
authors.lastname: Tas
authors.forename: Yahya
authors.initials: Y
authors.lastname: Islamoglu
authors.forename: Eyup
authors.initials: E
authors.lastname: Buyukkaya
authors.forename: Hanefi Yekta
authors.initials: HY
authors.lastname: Gurlertop
authors.forename: Huseyin
authors.initials: H
authors.lastname: Senocak
mesh_terms: D000328:Adult; D015150:Echocardiography, Doppler / Q000379:methods*; D004548:Elasticity; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013314:Stress, Mechanical; D018497:Ventricular Dysfunction, Right / Q000000981:diagnostic imaging* / Q000503:physiopathology*