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www.reference.com/article/heart-rate-f0e49c41670c7eb7

Calculate the heart rate by first finding the pulse at either the wrist or the neck. Then, count the number of beats in a 15-second period, and multiply that number by four to establish the overall heart rate, says Edward R. Laskowski, M.D.

www.reference.com/article/causes-low-heart-rate-be3015c7cd24d2b5

Bradycardia, or a slow hear rate, can result from being in good physical condition or from underlying health problems. Very fit, young adult athletes often have heart rates lower than the normal adult range of 60 to 100 beats per minute, according to WebMD.

www.reference.com/article/symptoms-low-heart-rate-5d21aaa8b758bf40

Typical symptoms of a low heart rate include weakness, dizziness, memory problems and shortness of breath, according to Mayo Clinic. These symptoms occur due to an insufficient supply of oxygen to the brain and other vital body organs.

www.reference.com/article/exchange-rate-calculator-fc99652d934da5f9

Banks, currency traders, tourists, and others use exchange rate calculators to determine how much of one currency they can buy with another currency based on current market conditions. Exchange rate calculators are often referred to as currency calculators. X-rates.com maintains a currency calculato

www.reference.com/article/heart-rate-controlled-a9e689098b383203

The body controls the heart rate through its own electrical system that ensures blood flows through the heart and lungs in a controlled manner. Issues with the electrical system, such as an arrhythmia, can cause problems with a regular heart beat and how the body controls heart rate.

www.reference.com/article/affects-heart-rate-4dba42bfb928c3de

According to the American Heart Association, heart rate is affected by factors both inside and outside the body. Body size, body position, personal emotions and use of certain medications can affect heart rate, although in some cases to a minimal extent. Air temperature also has a small effect on he

www.reference.com/article/considered-fast-heart-rate-4bdac1a05c8c4e69

A heart rate of more than 100 beats per minute in adults, a condition called tachycardia, is considered fast according to The American Heart Association. However, what is considered fast depends on the age and physical condition of an individual.

www.reference.com/article/normal-heart-rate-cc5d753629ac362

Normal resting heart rate for adults is between 60 and 100 beats per minute, according to the Mayo Clinic. Resting heart rate varies considerably by age, but after 16, teenagers have the same normal range as adults.

www.reference.com/article/effects-low-heart-rate-806d17133fd915cc

Effects of slow heart rate, or bradycardia, include dizziness, shortness of breath, tiredness and chest palpitations, according to WebMD. People who have slow heart rate may also feel confused or faint.

www.reference.com/article/bit-error-rate-calculated-df484fc7b268536e

Calculating the bit error rate involves dividing the number of bit errors by the total number of transferred bits during a fixed time interval. Bit error rate, or bit error ratio, is a unitless measure expressed as a percentage.