3. Physiology
        3.2. Cardiovascular
            3.2.2. Heart
                3.2.2.2. Electrical activity
3.2.2.2.1. Conduction speed

Conduction speed of cardiac action potential

Factors influencing conduction speed

Depends on

i.e. higher amplitude, faster upstroke, and more negative RMP, all lead to increased conduction speed

Thus,
Conduction speed slow in pacemaker tissues

 

Conduction speed in various cardiac tissues

 

Order of excitation

1. Interventricular septum (except for basal portion) and papillary muscles

2. From endocardium to epicardium

3. Last to be excited: posterior basal epicardial regions and a small area in basal portion of interventricular septum

 

NB:

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Created20050604
Reviewed20050815


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