Make a mark through. the axle hole and drill a 1/2 hole, (or the diameter of the axle hole for your wheels), for the axle. bolt in the marked position. Cut off the end so the edge closest to the axle hole is 32 1/2 long as shown.
What causes a rapid heart rate? A: According to WebMD, a rapid heart rate, also referred to as heart palpitations, can be caused by a variety of factors, including anxiety, the use of stimulants or caffeine, stress, and hormonal fluctuations during pregnancy.
Atrial fibrillation. Atrial fibrillation is a rapid heart rate caused by chaotic electrical impulses in the atria. These signals result in rapid, uncoordinated, weak contractions of the atria. The chaotic electrical signals bombard the AV node, usually resulting in an irregular, rapid rhythm of the ventricles.