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www.answers.com/Q/Is_a_heart_rate_of_40_dangerous_for_a_57_year_old_man

A heart rate of 40 is a bit slow for anyone. A slow heart rate is called bradycardia, and can be a symptom of many things.The most common is medications. A very common kind of medication, called a ...

www.healthtap.com/topics/is-a-heart-rate-of-40-dangerous

Helpful, trusted answers from doctors: Dr. Werner on is a heart rate of 40 dangerous: If you don't have any symptoms like dizziness, pre-syncope, syncope or fatigue or chest pain or shortness of breath, then you are ok. But you complained of chest pain. Hence it should be treated. Its etiology should be elicited. Thyroid problems and blocks in heart arteries should be ruled out. Consult your ....

universityhealthnews.com/daily/heart-health/low-heart-rate-dangerous

A low heart rate may be a sign of an efficiently working heart. Or, if the rate becomes too slow, a low heart rate could be a sign of health complications down the road. A normal or healthy resting heart rate for an adult is between 60 and 100 beats a minute. A heart rate near the lower end of that range is considered a good sign.

www.mayoclinic.org/healthy-lifestyle/fitness/expert-answers/heart-rate

A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.

www.hrsonline.org/patient-resources/slow-heartbeat

Slow heartbeat (heart rate), called bradycardia, is an arrhythmia, or disorder of the heart’s rhythm. Each day, a normal heart beats about 100,000 times, at a rate any­where from 60 to 100 times a minute. Changes in heart rate caused by activity, diet, medications, and age are normal and common.

www.livescience.com/42081-normal-heart-rate.html

Heart rate, also known as pulse, is the number of times a person's heart beats per minute. Normal heart rate varies from person to person, but a normal range for adults is 60 to 100 beats per ...

en.wikipedia.org/wiki/Bradycardia

Bradycardia is a condition typically defined wherein an individual has a resting heart rate of under 60 beats per minute (BPM) in adults. Bradycardia typically does not cause symptoms until the rate drops below 50 BPM. When symptomatic, it may cause fatigue, weakness, dizziness, sweating, and at very low rates, fainting. During sleep, a slow heartbeat with rates around 40–50 BPM is common ...

www.healthline.com/health/dangerous-heart-rate

What is a dangerous heart rate? Heart rates vary from person to person, influenced by activities, general health, and other variables. We’ll take a look at when your heart rate can be too fast ...

myheart.net/articles/low-heart-rate-bradycardia-explained-by-a-heart-doctor

The heart rate of 40-45 isn’t necessarily worrying although with the dizzy spells i would recommend a routine check up and exam and at least a baseline EKG to see where to go next. If you are interested in cutting edge information and therapy for heart disease then follow our twitter at @MustafaAhmedMD.

www.webmd.com/heart-disease/features/5-heart-rate-myths-debunked

Your heart rate may also speed up when you exercise, get excited, or feel anxious or sad. When you stand up, your pulse may go up for 15 to 20 seconds before it goes back to normal. Even the ...