answersLogoWhite

0


Best Answer

The hearts electrical activity starts with the sino-atrial node in the right atrium, which sends its impulse to the rest of the heart causing contraction. However it the SA node fails there are still two backups, the AV Junction, and the purkinje fibers, however they are not able to send out impulses as fast and the contractions aren't as efficient.

User Avatar

Wiki User

11y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

13y ago

sinoatrial node

This answer is:
User Avatar

User Avatar

Wiki User

11y ago

Sinotrial node

This answer is:
User Avatar

User Avatar

Wiki User

8y ago

SA node

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is responsible for initiating the heart beat?
Write your answer...
Submit
Still have questions?
magnify glass
imp