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www.reference.com/world-view/target-heart-rate-stress-test-6891ce10d3094de3

A patient is considered stressed upon reaching 85 percent of maximum heart rate, which is calculated by subtracting the patient's age from 220 for men and 210 for women, according to Patient.co.uk. However, a 2011 study suggests use of the metric underestimates inducible ischemia.

www.reference.com/article/heart-stress-test-4f91c9a1cf914d7f

A heart stress test helps a doctor determine a heart’s ability to endure stress before developing ischemia or abnormal rhythm and is most commonly performed as a treadmill exercise test. Other stress tests involve the administration of drugs that affect the heart, an echocardiogram or nuclear imagin

www.reference.com/article/calculate-variable-rates-f6e76f609759791

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.

www.reference.com/article/high-heart-rate-c820c903ace45086

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.

www.reference.com/article/causes-high-heart-rate-15cc945a977b8d88

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.

www.reference.com/article/should-heart-rate-de185df773d1cf91

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

www.reference.com/article/causes-fast-heart-rate-c5439dc09ae9a4e6

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

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/reasons-very-high-heart-rate-7f81155b8b55a135

An elevated heart rate above 100 beats per minute in adults is referred to as tachycardia, and its causes include anxiety, heavy alcohol consumption, heavy smoking, heart attack, sarcoidosis, some medications and some fevers, according to the American Heart Association. Treating the underlying condi

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.