A-Level Biology OCR A
Ventricles Wave Excitation Node Causing Contract Describe Happening
Front |
Describe what is happening in the heart at each stage of an ECG. |
Back |
ECG stages: - P-wave - wave of excitation spreads over both atria from SA node causing the atrial muscles to contract
- PR segment - delay at AV node to allow filling of ventricles
- QRS complex - wave of excitation spreading up walls of ventricles from the apex, causing ventricles to contract
- T wave - ventricles repolarise after which - ventricular diastole
|
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card:
Heart explain calculate rate ecg calculating count number
Previous card:
Draw label ecg names sections
Up to card list:
A-Level Biology OCR A