Electrical Conductivity of the Heart
teaching methods used
- direct teach
- assessment
- kolbs learning by doing
Points covered
- Explain the parts of the heart
- Understand starlings law
- Understand the electrical pathway through a heart
- Understand how the heart beat is controlled by the electrical pathway
Learning outcomes
- Explain the parts of the heart
- Understand starlings law
- Understand the electrical pathway through a heart
- Understand how the heart beat is controlled by the electrical pathway
- located in the right atria
- The natural pace maker of the heart
- intrinsic rate of 100 bpm
- Influenced by the sympathetic and parasympathic nervous sytems
Bundle of His
- Acts as conduction pathway to stop premature contraction of the ventricles
- Fires at a rate of 20-40 bpm
- splits into the left and right bundle branches
Anterioventricular Node
- located at the junction of the septum and the atria
- Has an intrinsic firing rate of 40-60
- Delays conduction by 0.12 seconds
- Allows atria to to fully contract and empty before the ventricles contract
purkinje fibers
- located throughout the apex of the heart
- Acts as the interface between the electrical pathway and the myocardium
- firing rate of 15-40 bpm