2. NORMAL ELETRICAL ACTIVITY OF THE
HEART
SA NODE
-for rate and rhtyhm setting
AV NODE
-slowing and regulating impulses between atria and ventricles
Impulse travels along the pathway into ventricles, the heart contracts
and pumps blood around the body
4. TYPES
• Sick sinus syndrome
- Occurs when SA node fails causing irregular
heart beat
• Heart block (AV block)
- Electrical impulses are slowed or blocked as
they travel from atria through AV node into the
ventricles