Lately, my heart rate has been fluctuating for no apparent reason what could this be?

It depends . It is normal for the heart rate to fluctuate throughout the fau due to the control by the sympathetic and parasympathetic nervous system. Sometimes this could be a sign of an arrhythmia (e.g. Supra ventricular tachycardia or atrial fibrillation), or blocked heart beats (heart blocks). If there are associated symptoms (fatigue, shortness of breath, dizziness) you may require to wear a monitor.

Related Questions

Without any physical activity my heart rate can go to 160-190 for 2-3 minutes and then back to 80-90. Terrible feeling but what could be the reason?

A Fib. Sounds like atrial fibrillation.. definitely need to see your Dr, have this evaluated and treated. You might consider ER if this is new problem.. Read more...
Not good. You need to see your doctor ASAP. Sounds as though you have an abnormality with your heart's electrical circuitry. You may have Wolff-Parkinson-White syndrome. The doctor will do some studies to determine the abnormal electrical pathway that is driving these symptoms. Best of luck. Read more...

For what reason is my resting heart rate 96?

So many reasons. To name a few: stress, infection, anemia, excess thyroid, pain, anxiety, fatigue; then there are heart diseases too. Many different kinds can cause the hr to speed up. Btw, 96 is a normal rate, . Read more...

My heart rate is high today, im on diltiazem (120 mg) once daily and coreg (carvedilol) (6.25 mg) twice daily but my hr still goes high for no apparent reason.

Why on meds ? The answer may be related to the reason you are on these medications, which you have not mentioned. Cannot give a good answer without knowing that. Read more...

Currently taking Atenolol 25mg at 7pm every evening for fast heart rate (never found reason). Have heard it's not good long term. Other options?

Not true. That's not true that it's not good long term. For your condition, it's a good medicine. The benefits in your case outweigh any risks. There's really no better medicine. All medicines have side effects and the cardiac meds for your specific condition have similar side effects. Read more...
Atenolol. no problem with long term atenolol use. On the other hand should try and find out why rapid rate. Read more...

My resting heart rate is 90-100 lately and I dont know the reason? Maybe stress? I'm 19 y/o female and this scares me. Should I be worried?

No worries. Your resting heart rate still falls in the normal range - stop worrying. Look for ways to better manage your stress: regular exercise, limit caffeine, time for recreation, meditation, etc all go a long way in helping us cope. Read more...
HR. HR can range from 60-100 in the normal range. If however, your HR is normally lower and now is elevated, this can be due to several reasons including increase in stress, anxiety, increase in caffeine intake or cocoa intake. If you have any symptoms of palpitations, chest pain or shortness of breath, you should be evaluated. Read more...
Here are some ... Heart resting rate of 90-100 per minute may be "normal" for less physically active people if having been able to conduct personal & occupational chores and tasks at a reasonable pace without short of breath. So, you may consult Doc to assess your general physical fitness, ability, and lifestyle as well as to ensure you're free of anxiety, insomnia, overactive thyroid, drug misuse, etc. Best wish.. Read more...