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what is a dangerous heart rate

A female asked:
Dr. Rebecca Gliksman
37 years experience Internal Medicine
Resting HR: HR is usually between 60-90, 72 is best. we usually don't worry till < 45 or 40( may not perfuse enough) , as athletes may have HR in 50's, or h ... Read More

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A female asked:
Dr. Jalal Zuberi
44 years experience Pediatrics
Tachycardia, SV: During an episode of SVT, the heart's electrical system doesn't work right, causing the heart to beat very fast. The heart beats at least 100 beats a ... Read More
A 43-year-old member asked:
Dr. Calvin Weisberger
50 years experience Cardiology
Heart rate: Normally heart rate responds to exercise or physiologic demand levels. Usually we don't see it go over 180-200 even with high levels of exercise. This ... Read More
A 43-year-old member asked:
Dr. Rodney Del Valle
35 years experience Anesthesiology
Normal HR is : 60-100. Anything lower than 60 specially if associated with dizziness/unsteadiness, shortness of breath, chest pain or other symptoms will need fast e ... Read More
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A 49-year-old member asked:
Dr. Calvin Weisberger
50 years experience Cardiology
Heart rate: Normally heart rate responds to exercise or physiologic demand levels. Usually we don't see it go over 180-200 even with high levels of exercise. This ... Read More
A 28-year-old member asked:
Dr. Louis Grenzer
54 years experience Cardiology
Varies: There is no specific dangerous heart rate during exercise. How fast your heart beats with exercise depends on a number of factors, especially your con ... Read More
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5 thanks
A 55-year-old female asked:
Dr. Venkata Chilakapati
22 years experience Cardiology
Slow heart beat: 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 complain ... Read More
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A 33-year-old female asked:
Dr. Gavin Noble
21 years experience Cardiology
It depends: On how you feel and what the cause is. Some people in that situation will feel dizzy or pass out. Some will need a pacemaker. Please see your docto ... Read More
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A 49-year-old member asked:
Dr. Bennett Werner
43 years experience Cardiology
Depends: It depends on how long, what time of day, and whether there are any symptoms present. It's not unusual to drop to 30 during sleep or to have a brief ... Read More
A 33-year-old male asked:
Dr. Pavel Conovalciuc
22 years experience Family Medicine
No: Really no! you would get exhausted before too long. If you do have a heart issue, though, then it may get acutely worse during strenuous exercise and ... Read More

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