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Variable interest rates are actually two rates added together. The first is a fixed rate called "margin" that is based on the credit worthiness of the borrower. The second rate varies and is tied to the movement of a specified index as stipulated in the loan contract.


A high heart rate, known as tachycardia, exists when a person's resting pulse exceeds 100 beats per minute, according to Mayo Clinic. The normal heart beat range for a healthy adult is between 60 and 100 beats per minute.


The causes of a high heart rate include exercise, caffeine consumption, sudden stress, smoking and taking certain medications. In some cases, an elevated heart rate is a sign of heart disease, congenital heart abnormalities, electrolyte imbalances or drinking too much alcohol, reports Mayo Clinic.


The normal resting heart beat for the average adult should range between 60 and 100 beats per minute, as stated by the American Heart Association. Trained athletes can have a lower resting heart rate that ranges between 40 to 60 beats per minute. There are many influencing factors that affect heart


According to the American Heart Association, a heart rate of over 100 beats per minute is also referred to as tachycardia and occurs when the heart's electrical signals interfere with the sinoatrial node that is responsible for maintaining a balanced heart rate. Rapid heart rates can be triggered by


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.


As of October 2014, there are numerous mobile apps that have doctor ratings and reviews; however, they do not allow mobile users to rate doctors. Healthgrades is America’s top website for locating a physician, and the app has many of the same features.


Some of the best free AT&T apps include AT&T Locker, Evernote and Shazam. These apps are all available for free in the AT&T app store and compatible with most AT&T phones.


There are several metabolic-rate calculators available in 2015, including Basal Metabolic Rate -- BMR Calculator from the Apple App Store, BMR Calculator from BMI-Calculator.com, Resting Metabolic Rate Calculator from Bodybuilding.com and BMR Calculator from My Fitness Pal. Many of these metabolic c


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.