A blood clot, also called a thrombus, in the anterior interventricular branch causes sudden death. This branch supplies the majority of blood to the walls of both ventricles. The presence of a thrombus can block the bloodflow to heart muscle cells, causing instant death.
all of a sudden.......
The sudden drop in air temperature is a stimulus.
The sudden drop in air temperature is a stimulus.
A sudden decrease in barometric pressure is a sign that a storm is coming.
A sudden heavy rain is called a downpour or a squall and generally occur in monsoon climates which are located near the Equator. Monsoon rains are often violent, strong and sudden.
Because it would block the blood flow and stop the heart.
Slaughter.
Non-contact injuries, often occurring during activities involving sudden change in direction, abrupt stopping, or landing from a jump, are the most common causes of anterior cruciate ligament (ACL) injuries. These injuries can happen in sports like soccer, basketball, and skiing.
Commotio cordis is heart failure due to a sudden impact to the anterior chest wall
Asphyxiation
There are several causes of sudden water retention. Poor circulation, premenstrual symptoms, salt, or a blockage in the lymphatic system can all cause this condition.
a surge of testosterone in males and it causes ovulation in females.
Ingesting Ipecac
testosterone
Improper diet
A shock is something which causes sudden, heavy impact, a sudden electrical charge, or an amount of considerable emotional impact.
I would ask your vet but that sounds like Parvo