Tachycardia is a term to describe rapid heart rate. Although it is often harmless, it can be a sign of a serious issue like atrial fibrillation (AFib), which can lead to life-threatening complications.
For a newborn baby, 100 beats per minute is considered normal. "But for an adult, that's way too fast," Gupta said.
"If they feel the heart rate is rapid and irregular, that is cause for concern."
Read the full U.S. News & World Report article.