Describe what each point of an ECG represents.

P wave: atrial depolarisation and subsequent contraction. QRS complex: Ventricular depolarisation and subsequent contraction. Q wave is negative due to left to right depolarisation of ventricular septum. Atrial repolarisation occurs here but electrical activity is masked by QRS complex. ST segment: ventricular repolarisation.

Answered by Humza C. Biology tutor

6260 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe how antibiotic resistance occurs.


What causes cancer?


Explain how the structure of RNA differs from that of DNA? (3 marks)


Describe the stages of the europhication process (6 marks)


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences