Changes of Aortic Dimensions as an Evidence of Cardiac Pump Mechanism During Cardiopulmonary Resuscitation: Transesophageal Echocardiographic Observation
Journal of the Korean Society of Emergency Medicine
;
: 60-69, 1999.
Artigo
em Coreano
| WPRIM
| ID: wpr-119785
ABSTRACT
BACKGROUND:
Although the cardiac pump mechanists and the thoracic pump mechanism have been suggested, the mechanism of blood flow generated by precordial compression in human remains controversial. We hypothesized that, during compression systole, the proximal descending thoracic aorta would be distended by forward blood flow if the heart acts as a pump, and be contacted or unchanged if increased intrathoracic pressure generates blood flow.METHODS:
Fourteen patients with cardiac angst underwent transesophageal echocardiogaphy to verify the morphologic changes of the descending thoracic aorta during standard manual cardiopulmonary resuscitation. The aortic dimensions including cross sectional area and diameters at the end of compression and of relaxation were measured proximal to and at the maximal compressing site of the descending thoracic aorta.RESULTS:
At the point of maximal compression, deformations of the descending thoracic aorta were observed during compression in all patients and ratio of the longest to shortest diameter of the aorta deceased during compression than relaxation(0.58+/-0.15 versus 0.81+/-0.11, p=0.001). Cross sectional area of the aorta at the maxim compression deceased during compression than relaxation(3.01+/-1.91 versus 7.26+/-14.70 cm2, p=0.035). Ratio of the longest to shortest diameter of the proximal descending thoracic aorta remained unchanged during compression and relaxation(1.0+/- 0.88 versus 1.0+/-0.9, p=0.345). Cross sectional area of the proximal descending thoracic aorta increased during compression than relaxation(4.81+/-2.86 versus 4.29+/-2.51 cm2, p=0.011).CONCLUSION:
Distention of the proximal descending thoracic aorta and deformation of the aorta at the maximal compression during the compression systole suggests that the heart act as a pump during standard manual cardiopulmonary resucitation in human.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Aorta
/
Aorta Torácica
/
Relaxamento
/
Sístole
/
Ecocardiografia
/
Reanimação Cardiopulmonar
/
Coração
Limite:
Humanos
Idioma:
Coreano
Revista:
Journal of the Korean Society of Emergency Medicine
Ano de publicação:
1999
Tipo de documento:
Artigo
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