Cardiovascular Aspects
During defecation, the thoracic blood pressure rises, and as a reflex response the amount of blood pumped by the heart decreases. Death has been known to occur in cases where defecation causes the blood pressure to rise enough to cause the rupture of an aneurysm or to dislodge blood clots (see thrombosis). Also, in terminating the Valsalva maneuver, blood pressure falls; this, often coupled with standing up quickly to leave the toilet, results in a common incidence of fainting, caused by Orthostatic hypotension.
Read more about this topic: Defecation
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