tachycardia is a heart rate that exceeds the normal range. A resting heart
rate over 100 beats per minute is generally accepted as tachycardia.
Good article here >
The radial artery (wrist above thumb) is the easiest to use to check the
However, in emergency situations the most reliable arteries to measure
heart rate are carotid arteries (neck).
Other causes :
Adverse reactions to adrenaline include palpitations, tachycardia, arrhythmia, anxiety, panic attack, headache, tremor, hypertension, and acute pulmonary edema.
Use is contraindicated in people on nonselective β-blockers, because
severe hypertension and even cerebral hemorrhage may result.