Prinzmetalâs angina is rare, representing about two out of 100 cases of angina, and usually occurs in younger patients than those who have other kinds of angina. Causes of Variant (Prinzmetal) Angina: The pain from variant angina is caused by a spasm in the coronary arteries (which supply blood to the heart muscle).The coronary arteries can spasm as a result of: Symptoms of Variant (Prinzmetal) Angina: The pain or discomfort:rinzmetalâs angina is rare, representing about two out of 100 cases of angina, and usually occurs in younger patients than those who have other kinds of angina. Causes of Variant (Prinzmetal) Angina: The pain from variant angina is caused by a spasm in the coronary arteries (which supply blood to the heart muscle).
Adult dragonflies mostly eat other flying insects, particularly midges and mosquitoes. They also will take butterflies, moths and smaller dragonflies. The larvae, which live in water, eat almost any living thing smaller than themselves. Larger dragonfly larvae sometimes eat small fish or fry.
In Japan, dragonflies symbolize victory in battle. Legend has it that the Emperor of Japan was once bitten by a horsefly that was later eaten by a dragonfly. To honor the dragonfly, he named Japan Akitsushima, or the Isles of the Dragonfly.. Today, Japan is a global leader in the study of dragonflies.