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.
Dragonflies Eat Things, Too. Dragonflies might be the prey, but they're also carnivorous predators. Dragonflies are pretty tough in the predation department, whether they're young or adult. Flies, damselflies, ants, termites, aphids and mosquitoes are all pretty common dishes on the mature dragonfly menu.redators of Adults. Adult dragonflies must dodge a broad assortment of predators, specifically arthropods, reptiles, fish such as bass, tiny mammals such as water shrews, frogs and fellow insects. Bees routinely go after mature dragonflies.