title: Atrial natriuretic peptide levels after different types of inferior wall myocardial infarction.
abstract: BACKGROUND
  Atrial natriuretic peptide (ANP) is released from cardiac atrium secondary to increased atrial pressure. The plasma levels of ANP have been found to be related to short- and long-term prognosis after acute myocardial infarction (MI). The purpose of the present study was to investigate the plasma levels of ANP in three groups of patients with inferior wall acute MI classified according to ST-segment depression in the precordial leads.
  
  
  METHODS
  The study population consisted of 18 patients with inferior wall acute MI classified into three types: Type 1 = no precordial ST-segment depression (7 patients), Type 2 = sum of ST-segment depression in leads V1 to V3 equal to or more than the sum of ST-segment depression in leads V4 to V6 (4 patients), and Type 3 = maximal precordial ST-segment depression in leads V4 to V6 (7 patients).
  
  
  RESULTS
  Radioimmunoassay showed that plasma ANP levels were significantly higher in patients with Type 3 acute inferior wall myocardial infarction compared with those with Types 1 and 2 (313.1 +/- 233, 73.0 +/- 27.5), and 84 +/- 32.7 pg/ml, respectively, p = 0.018).
  
  
  CONCLUSIONS
  Plasma ANP levels are higher in patients with Type 3 acute inferior wall MI compared with patients with Types 1 and 2. These findings, together with earlier ones, may contribute to our understanding of the pathophysiology of the presence of ST-segment depression in the precordial leads in inferior wall acute MI.
authors.affiliation: Department of Cardiology, Rabin Medical Center, Petah Tiqva, Sackler Faculty of Medicine, Tel Aviv University, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Assali
authors.forename: I
authors.initials: I
authors.lastname: Gilad
authors.forename: I
authors.initials: I
authors.lastname: Herz
authors.forename: A
authors.initials: A
authors.lastname: Solodky
authors.forename: J
authors.initials: J
authors.lastname: Sulkes
authors.forename: B
authors.initials: B
authors.lastname: Strasberg
authors.forename: S
authors.initials: S
authors.lastname: Sclarovsky
mesh_terms: D000368:Aged; D009320:Atrial Natriuretic Factor / Q000097:blood*; D016022:Case-Control Studies; D017023:Coronary Angiography; D004562:Electrocardiography; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood* / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology; D011446:Prospective Studies; D011863:Radioimmunoassay
chemical_list: D009320:Atrial Natriuretic Factor