title: [Changes in the geometry of the heart cavities in patients with cardiac tamponade undergoing pericardial drainage].
abstract: OBJECTIVE
  The objective of our study was to evaluate the changes in cardiac chamber dimension--longitudinal and transversal axis--in patients with cardiac tamponade after drainage of the pericardial effusion.
  
  
  METHODS
  This is a five year retrospective study (from 1991 to 1995 inclusive) which evaluates patients with cardiac tamponade from a clinical and electrocardiographic, as well as echocardiographic, point of view.
  
  
  METHODS
  Thirty-nine consecutive patients with cardiac tamponade were evaluated clinically and by ECG and two-dimensional echocardiography, before and after drainage of the pericardial effusion. The drainage was done by pericardiocentesis alone in 28 cases (72%), pericardiocentesis followed by surgery in seven cases (18%) and surgery alone in four cases (10%).
  
  
  RESULTS
  After drainage we observed a reduction in the diameter of the pericardial effusion from 30.1 +/- 8 to 8.1 +/- 7 mm; the occurrence of jugular vein turgescence decreased from 87% to 5% (p < 0.001) and heart rate also decreased from 100 +/- 20 beats/minute to 79 +/- 17 beats/minute (p < 0.001). Systolic blood pressure increased from 107.8 +/- 20.4 mmHg to 134.6 +/- 20.3 mmHg (p < 0.001). All longitudinal and transversal diameters of the cardiac chambers increased after drainage. The greatest increase was observed in the transversal diameters of the right chambers.
  
  
  CONCLUSIONS
  Cardiac tamponade affects both right and left cardiac chambers which are affected in their transversal as well as longitudinal diameters; the effect of compression was more marked in the right chambers and in the transversal diameters.
authors.affiliation: Serviço de Cardiologia dos Hospitais da Universidade de Coimbra.
authors.forename: H
authors.initials: H
authors.lastname: Vieira
authors.forename: L M
authors.initials: LM
authors.lastname: Gonçalves
authors.forename: A
authors.initials: A
authors.lastname: Felizardo
authors.forename: M
authors.initials: M
authors.lastname: Ventura
authors.forename: A
authors.initials: A
authors.lastname: Monteiro
authors.forename: L A
authors.initials: LA
authors.lastname: Providência
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002305:Cardiac Tamponade / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology* / Q000601:surgery; D004322:Drainage / Q000379:methods*; D004452:Echocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
vernacular_title: Alterações da geometria das cavidades cardíacas em doentes com tamponamento cardíaco submetidos a drenagem pericárdica.