hello,
First thing do you have any symptoms during this reading, because at this
heart rate one will severe symptoms like giddiness, fainting,
chest pain or heaviness,
shortness of breath etc. If not it's likely to be a false readings. Sometimes it can record each pulse as two and doubles the heart rate.
If you had symptoms, then it can be a
cardiac arrhythmia like psvt or atrial
fibrillation, in which heart rate suddenly goes up and also suddenly decreases. Blood pressure falls during these episodes and one has
dizziness, fainting, blackouts, sometimes syncope. Usually ecg is normal as it is usually done in between the episodes. ECG done during episodes will show abnormality. You can repeat 24 hour holter monitoring. Also,
hemoglobin and thyroid test should be done. ln order to abort such episodes you should try to cough hard. Till the time your evaluation is complete, you can ask your local doctor for tab ciplar LA 20 mg once a day.
If none of the above is successful then last option is of electrophysiological studies which is invasive test which can diagnose and treat the arrhythmia permanently in most of the cases.