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  • This animation will show some of the most common types of arrhythmia.

  • Click the navigation arrows below the animation screen to play, pause, rewind or

  • fast-forward the animation. This animation contains sound.

  • Your heart is a muscular organ which lies in the centre of your chest.

  • Your heartbeat is controlled by electrical impulses, which travel across

  • the heart making it contract.

  • The atria contract first, sending blood into the ventricles.

  • The ventricles then contract, sending blood to the lungs and around the body.

  • Nerves supplying the heart change the rate at which impulses are sent across the

  • heart muscle

  • to meet the needs of the body.

  • In atrial fibrillation,

  • the electrical impulses in the atria become disorganised,

  • overriding the heart's normal rate and rhythm.

  • This causes the atria to quiver (or 'fibrillate').

  • The irregular impulses can be transmitted to the ventricles,

  • causing the heart to pump irregularly and too fast.

  • In supraventricular tachycardia (or SVT), the irregular electrical impulses pass across

  • the ventricles

  • and back up into the atria in a circle, rather than travelling from the atria

  • to the ventricles in one direction, as they should.

  • This makes the heart beat faster.

  • In ventricular tachycardia, abnormal electrical impulses are produced in the

  • lower chambers of the heart.

  • This causes the heart to pump faster than normal.

  • The ventricles may not have enough time to fill up with blood properly,

  • so less blood is pumped around your body.

  • In heart block, the electrical impulses that control your heartbeat are slowed down or

  • blocked

  • as they travel through your heart.

  • This can result in a slow heart rate.

  • In ventricular fibrillation,

  • electrical impulses start firing from many different points in the lower

  • chambers of the heart, very rapidly and in an irregular rhythm.

  • This makes the heart quiver and unable to beat properly.

  • Ventricular fibrillation is fatal without prompt treatment.

  • This is the end of the animation.

  • Click on the animation screen to watch it again.

This animation will show some of the most common types of arrhythmia.

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B2 中高級 美國腔

心律失常的不同類型 (The different types of heart arrhythmia)

  • 98 10
    alex 發佈於 2021 年 01 月 14 日
影片單字