Heart - Cardiac Action Potential and Dysrhythmias Flashcards
1
Q
Define p-wave
A
Depolarisation of the atria or both atria
2
Q
Define QRS complex
A
Depolarisation of the ventricles
3
Q
Define PR interval
A
Atrial depolarisation and AV delay
4
Q
Define QT interval
A
Ventricular depolarisation and depolarisation
5
Q
Define PR segment
A
AV delay
6
Q
A
7
Q
Define ST segment
A
Ventricular plateau (refractiveness of the heart)
8
Q
Define T-wave
A
Depolarisation of the ventricles
9
Q
Where is the pacemaker AP?
A
In SAN and and AVN
10
Q
Where is the cardiac AP?
A
In atrial and ventricular myocytes and bundle of His and in purkinje fibres
11
Q
What is abolsute or effective refractory period?
A
Generation of the 2nd AP is not possible even at the strongest consecutive stimulus
12
Q
What is the relative refractory period?
A
Generation of the 2nd AP is possible but requires a stronger stimulus
13
Q
A
