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.
Here are 10 cool facts about fireflies. 1. Fireflies, also called lightning bugs, are neither flies nor bugs. Fireflies are actually beetles. Like all other beetles, they have hardened forewings called elytra, which meet in a straight line down the back when at rest.e don't know much about what adult fireflies eat. Most don't seem to feed at all, while some are believed to eat mites or pollen. We do know what Photuris fireflies eat, though â other fireflies! Photuris females enjoy munching on males of other genera.