Pulse 120 and above: what these numbers mean

A pulse of 120–145 on your watch or blood pressure monitor is alarming, but the number alone doesn't settle anything. Heart rate (HR) changes throughout the day, and context and duration matter.

What pulse is considered normal and from what value it is fast

For adults and children aged 10 and older, a normal resting pulse is 60–100 beats per minute. In trained athletes it can be 40–60. In children the numbers are higher: in newborns 70–190, in infants 1–11 months 80–160, in children 1–2 years 80–130, 3–4 years 80–120, 5–6 years 75–115, 7–9 years 70–110. Tachycardia is defined as a heart rate of 100 beats per minute or more. That is, 112, 115, 120, 125, 130, 140 and 145 are all already above the resting norm, but the number alone doesn't settle anything.

Pulse 112–125: when this is normal

Your heart is not a metronome. It speeds up with exertion, excitement, fear. A pulse of 112 with normal blood pressure after climbing stairs without a lift or before a performance is physiological tachycardia, not a disease. At rest, a fast pulse also occurs in people with anemia (iron deficiency), in hyperthyroidism (overactive thyroid), during menopause and pregnancy. Caffeine, alcohol, nicotine, sleep deprivation, stress and some medications also raise the numbers. To measure resting pulse, a person should rest for at least 10 minutes; beats are counted for a full minute or for 30 seconds multiplied by 2.

Pulse 130, 140 and above: what this may mean

The higher the number, the more attention you should pay to it. A resting pulse of 130–140 without a reason is a signal to check the rhythm. An episode of sudden palpitations at a rate of 150–300 beats per minute is called paroxysmal tachycardia: it starts abruptly and stops just as abruptly. Tachycardia is not a disease but a symptom: it is caused by disorders of the autonomic, endocrine system, hemodynamics or arrhythmias. With a fast rhythm, the ventricles do not have time to fill with blood, pressure drops, organs receive less blood, and the heart itself works under overload.

Why the pulse speeds up: main causes

The list of causes is broad — from everyday to cardiological:

• Exertion, stress, anxiety, sleep deprivation
• Caffeine, alcohol, nicotine, some medications
• Anemia, hyperthyroidism, menopause, pregnancy
• Arrhythmia, valve defects and other heart problems
• Infection or dehydration — a fast pulse can be a sign of them

How a fast pulse is assessed: ECG and other examinations

The doctor looks at the numbers together with symptoms and history: how long it has been speeding up, how long it lasts, whether there are heart problems in you or in your family. The basic examination is an ECG: small sensors on the skin record the heart's electrical signals and show where the rhythm is coming from. If the episode has already passed, you may be referred to a cardiologist for additional tests. The doctor may prescribe additional examinations depending on the suspected cause.

When a fast pulse requires urgent medical attention

See a doctor routinely — if the palpitations return, happen more often, last longer than a few minutes, and you feel normal. Separately — if you have heart disease or a family history of such problems.

The number on your watch alone is not a reason to call an ambulance; 103 or 112 — if the palpitations do not pass or are accompanied by chest pain, shortness of breath, a pre-syncopal state or fainting.

Myth: "if the pulse is 120, it means a heart attack." Fact: in most people a fast pulse is not associated with anything serious, but persistent tachycardia at rest requires evaluation. This material is for reference — the numbers help you get your bearings, but the decision about your heart is made by a doctor at an appointment.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer