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.
The dragonfly (suborder Anisoptera) is an insect of the order Odonata, with large multifaceted eyes, two pairs of long transparent wings, and a long body.Dragonflies have very good eye sight due to their unique eye structure.nother name for them is mosquito hawks. Dragonflies do not bite or sting humans.[1]. The life cycle of the dragonfly, from egg to death of adult, is from six months to as much as six or seven years. Sometimes female dragonflies lay eggs in the small cleft between mud or moss.