30/06/2021
Victims of boas do not die from suffocation, but from cardiac arrest and blood circulation. The snake's "embrace" causes a sharp drop in blood pressure, which causes the blood to stop delivering oxygen to the cells, as well as an increase in venous pressure, which prevents blood from returning from the veins to the heart. Thus, the victim experiences a kind of heart attack, and the boa constrictor loses its grip when it feels a cardiac arrest.