![]() This type of arrhythmia occurs when rapid, chaotic electrical signals cause the lower heart chambers (ventricles) to quiver instead of contacting in a coordinated way that pumps blood to the rest of the body. Supraventricular tachycardia causes episodes of a pounding heartbeat (palpitations) that begin and end abruptly. Supraventricular tachycardia is a broad term that includes arrhythmias that start above the lower heart chambers (ventricles). Atrial flutter is similar to A-fib, but heartbeats are more organized. A-fib is associated with serious complications such as stroke. The condition may be temporary, but some A-fib episodes may not stop unless treated. Chaotic heart signaling causes a rapid, uncoordinated heart rate. The resting heart rate is less than 60 beats a minute. Bradycardia (brad-e-KAHR-dee-uh) is a slow heartbeat.The resting heart rate is greater than 100 beats a minute. Tachycardia (tak-ih-KAHR-dee-uh) is a fast heart.In general, heart arrhythmias are grouped by the speed of the heart rate. A heart-healthy lifestyle can help prevent heart damage that can trigger certain heart arrhythmias. Heart arrhythmia treatment may include medications, catheter procedures, implanted devices or surgery to control or eliminate fast, slow or irregular heartbeats. ![]() For example, the heart rate may increase with exercise or slow down during sleep. However, sometimes it's normal for a person to have a fast or slow heart rate. However, some heart arrhythmias may cause bothersome - sometimes even life-threatening - signs and symptoms. Their main use is to transport and protect arrows.Heart arrhythmias may feel like a fluttering or racing heart and may be harmless. The Yazutsu is a different type, used in Kyudo. Yebira refers to a variety of quiver designs. Some had straps or rope sewn to them for carrying, but many either were tucked into the belt or set on the ground before battle to allow easier access. When not in use, the drawstring could be closed, completely covering the arrows so as to protect them from rain and dirt. They are popular with compound bow hunters as it allows one piece of equipment to be carried in the field without encumbering the hunter's body.Ī style used by medieval English longbowmen and several other cultures, an arrow bag is a simple drawstring cloth sack with a leather spacer at the top to keep the arrows divided. They can be simply stakes in the ground with a ring at the top to hold the arrows, or more elaborate designs that hold the arrows within reach without the archer having to lean down to draw.Ī modern invention, the bow quiver attaches directly to the bow's limbs and holds the arrows steady with a clip of some kind. Ground quiver Ī ground quiver is used for both target shooting or warfare when the archer is shooting from a fixed location. While popular in cinema and 20th century art for depictions of medieval European characters (such as Robin Hood), this style of quiver was rarely used in medieval Europe. They were also used in Ancient Greece and often feature on sculptural representations of Artemis, goddess of the hunt. This style of quiver was used by native peoples of North America and Africa, and was also commonly depicted in bas-reliefs from ancient Assyria. Arrows can be drawn over the shoulder rapidly by the nock. A y-shaped harness for a back quiver features on this bronze statue of Artemis, goddess of the hunt, mid-4th century BC.īack quivers are secured to the archer's back by leather straps, with the nock ends protruding above the dominant hand's shoulder.
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