The normal resting heart rate for adults over the age of 10 years, including older adults, is between 60 and 100 beats per minute (bpm). Heart rate accelerates after exercise, excitement, agitation, smoking, and intake of alcohol and strong tea. High heart rate with nausea may be caused by tachycardia. If you feel palpitations, chest tightness, and nausea, you should take electrocardiogram or dynamic electrocardiogram to rule out arrhythmia.
In normal healthy adults, the heart rate is in the range of 60-100 beats per minute. So what is your resting heart rate now? In fact, this is meaningless, as it should be compared with your own heart rate when you are healthy. For instance, if your previously resting heart rate is 65 beats per minute, and now your heart rate is 90 beats minute. Although your current heart rate is still within the normal range, it is not "normal" for you. In many cases, doctors prescribe propranolol to slow down the heart rate.