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Question 18N.3.SL.TZ0.17a

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.SL.TZ0.17a
Level SL Paper 3 Time zone TZ0
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
18N.3.SL.TZ0.17a

An electrocardiogram (ECG) records the electrical activity of the heart over a period of time using electrodes placed on the skin. The ECG shown is from a patient whose heart was beating irregularly until it was treated using a defibrillator (arrows) which restored normal electrical activity.

(a)

State how many normal heartbeats are shown in the ECGs.

[1]

Markscheme

8 ✔

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