Formative Assessment Week 1 and 2 Flashcards
1
Q
The cardiac impulse normally originates in…?
A
the sino-atrial node
2
Q
Regarding the cardiac impulse - the only point of electrical contact between the atria and the ventricles is?
A
the atrio-ventricular node
3
Q
the cardiac impulse spreads from the AV node to the ?
A
the bundle of His
4
Q
The bundle of His normally divides into?
A
right and left branches
5
Q
Sympathetic stimulation causes…?
A
a positive chronotropic effect
6
Q
in contractile cardiac muscles - the plateau phase of the action potential is mainly due to…?
A
Calcium influx through L-type channels
7
Q
The P wave is caused by?
A
atrial depolarisation
8
Q
The PR interval is measured from?
A
the end of the P wave to the beginning of the QRS complex
9
Q
What occurs during the ST segment?
A
ventricular systole
