Comblab project finished in December 2014. In this website you can download Comblab teaching materials ready to be used in several languages. Currently most Comblab partners go on working with MBL for secondary science.

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WHAT MAKES YOUR HEART BEAT? How to influence heart activity?

The heart is crucial, irreplaceable for humans because it works tirelessly from birth to death. Its role is essential – heart ensures blood circulation in the bloodstream by contractions and the supply of oxygen to the cells, which is used for energy production and for life at all. The heart works like a regular pump never-ending, with which we can see some phases. These phases correspond to the gradual withdrawal of ventricular fibrillation. As for pumping water, also the heart is influenced by pulse - the rhythmical electrical discharges in the right atrium. Procedure of electrical discharge can be monitored and recorded by electrodes in the electrocardiogram (ECG).

ECG is typical with its regular record and it can also detect non-typical behaviour of the heart. Therefore ECG is basic cardiac examination. It is possible to influence the shape of the ECG to a certain extent, yet it keeps the characteristic features of concrete person.

Find out what variable can influence the ECG curve. What parts of the ECG can we influence? Explain the difference between your normal ECG curve and the curve when you change some condition.

PDF icon 05_bio_ecg_eng_student.pdf509.54 KB
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