Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France.
Scand J Med Sci Sports. 2014 Feb;24(1):111-6. doi: 10.1111/j.1600-0838.2012.01474.x. Epub 2012 May 22.
Hemodynamic changes induced by self-contained underwater breathing apparatus diving were investigated using Doppler echocardiography. We detected circulating bubbles in both right and left cavities of the heart and in the cerebral circulation in two divers with a large patent foramen ovale. A reduction in the left ventricular preload was suggested by echocardiographic measurements. The decreased cardiac preload was paralleled to a lower stroke volume and cardiac output. These findings were also observed in divers with no evidence of circulating bubbles. In these subjects, pulmonary vascular resistances remained unchanged while an increase was observed in the two divers with arterial bubbles. This increase could promote right-to-left shunting.
使用多普勒超声心动图研究了自给式水下呼吸器潜水引起的血液动力学变化。我们在两名房间隔缺损较大的潜水员的心脏右心房和左心房以及大脑循环中检测到循环气泡。超声心动图测量提示左心室前负荷降低。降低的心脏前负荷与较低的每搏量和心输出量相平行。在没有循环气泡证据的潜水员中也观察到这些发现。在这些受试者中，肺血管阻力保持不变，而在有动脉气泡的两名潜水员中观察到增加。这种增加可能会促进右向左分流。
