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2. Heart rate - Wikipedia

   en.wikipedia.org/wiki/Heart_rate

   A medical monitoring device displaying a normal human heart rate. Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide.

3. Vital signs - Wikipedia

   en.wikipedia.org/wiki/Vital_signs

   The pulse may vary due to exercise, fitness level, disease, emotions, and medications. [11] The pulse also varies with age. A newborn can have a heart rate of 100–⁠160 bpm, an infant (0–⁠5 months old) a heart rate of 90–⁠150 bpm, and a toddler (6–⁠12 months old) a heart rate of 80–140 bpm. [12]

4. What’s the Difference Between a Normal and Dangerous Heart Rate?

   www.aol.com/difference-between-normal-dangerous...

   Normal heart rate varies based on a person’s age, fitness and activity levels, temperature, caffeine, stress, and other risk factors (such as blood pressure, chronic diabetes, obesity, etc ...

5. Your resting heart rate can tell you a lot about your health ...

   www.aol.com/finance/resting-heart-rate-tell-lot...

   Those are times to seek out help because it may not be a reflection of your resting heart rate, but an abnormal heart rhythm that should get evaluated.” Having a pulse over 100 bpm is called ...

6. Cardiac output - Wikipedia

   en.wikipedia.org/wiki/Cardiac_output

   Major factors influencing cardiac output – heart rate and stroke volume, both of which are variable. [1]In cardiac physiology, cardiac output (CO), also known as heart output and often denoted by the symbols , ˙, or ˙, [2] is the volumetric flow rate of the heart's pumping output: that is, the volume of blood being pumped by a single ventricle of the heart, per unit time (usually measured ...

7. Normal Heart Rate for Elderly: What You Need to Know - AOL

   www.aol.com/normal-heart-rate-elderly-know...

   Heart rate is the rate or speed at which your heart beats, and it’s determined by counting the number of beats per minute while you’re at rest. In all adults, including seniors, a normal ...

8. QT interval - Wikipedia

   en.wikipedia.org/wiki/QT_interval

   Upper limit of normal QT interval, corrected for heart rate according to Bazett's formula, [5] Fridericia's formula, [10] and subtracting 0.02 s from QT for every 10 bpm increase in heart rate. [13] Up to 0.42 s (≤ 420 ms) is chosen as normal QTc of QT B and QT F in this diagram.

9. Cardiac physiology - Wikipedia

   en.wikipedia.org/wiki/Cardiac_physiology

   The resting heart rate of a newborn can be 120 beats per minute (bpm) and this gradually decreases until maturity and then gradually increases again with age. The adult resting heart rate ranges from 60 to 100 bpm. Exercise and fitness levels, age and basal metabolic rate can all affect the heart rate. An athlete's heart rate can be lower than ...