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  2. Tachycardia - Wikipedia

    en.wikipedia.org/wiki/Tachycardia

    This energy shortage in muscle cells causes an inappropriate rapid heart rate in response to exercise. The heart tries to compensate for the energy shortage by increasing heart rate to maximize delivery of oxygen and other blood borne fuels to the muscle cells. [12] "In McArdle's, our heart rate tends to increase in what is called an ...

  3. Does your heart beat faster when you stand or sit up? Learn ...

    www.aol.com/does-heart-beat-faster-stand...

    The most common symptoms of POTS are rapid heart rate within 10 minutes of standing or sitting up, ... increased heart rate after a few minutes of standing and not enough blood flow to the brain ...

  4. Supraventricular tachycardia - Wikipedia

    en.wikipedia.org/wiki/Supraventricular_tachycardia

    A normal resting heart rate is 60 to 100 beats per minute. A resting heart rate of more than 100 beats per minute is defined as a tachycardia. During an episode of SVT, the heart beats about 150 to 220 times per minute. [9] Specific treatment depends on the type of SVT [5] and can include medications, medical procedures, or surgery. [5]

  5. Sinus tachycardia - Wikipedia

    en.wikipedia.org/wiki/Sinus_tachycardia

    Sinus tachycardia is a sinus rhythm of the heart, with an increased rate of electrical discharge from the sinoatrial node, resulting in a tachycardia, a heart rate that is higher than the upper limit of normal (90-100 beats per minute for adult humans). [1] The normal resting heart rate is 60–90 bpm in an average adult. [2]

  6. Cardiac action potential - Wikipedia

    en.wikipedia.org/wiki/Cardiac_action_potential

    The action potential passes along the cell membrane causing the cell to contract, therefore the activity of the sinoatrial node results in a resting heart rate of roughly 60–100 beats per minute. All cardiac muscle cells are electrically linked to one another, by intercalated discs which allow the action potential to pass from one cell to the ...

  7. Arrhythmia - Wikipedia

    en.wikipedia.org/wiki/Arrhythmia

    Increased heart rate is a normal response to physical exercise or emotional stress. This is mediated by the sympathetic nervous system on the sinus node and called sinus tachycardia. Other conditions that increase sympathetic nervous system activity in the heart include ingested or injected substances, such as caffeine or amphetamines , and an ...

  8. 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 ...

  9. Woman shares life-changing diagnosis after smartwatch detects ...

    www.aol.com/news/woman-shares-life-changing...

    Transforms health, reverses heart failure. Woman's smartwatch detects high beats per minutes. Woman shares life-changing diagnosis after smartwatch detects rapid heart rate