Spiking in heart rate at rest could be caused by a rhythm disturbance within the heart. I would advise that you attend your local Emergency Room to have an electrocardiogram (ECG) performed, to check the underlying heart rhythm. You may require a 24 hour Holter (heart) monitor, as an in-patient or an out-patient depending on the results of the above ECG.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.