Flashcards in Formative Assessment Week 1 and 2 Deck (9)
The cardiac impulse normally originates in...?
the sino-atrial node
Regarding the cardiac impulse - the only point of electrical contact between the atria and the ventricles is?
the atrio-ventricular node
the cardiac impulse spreads from the AV node to the ?
the bundle of His
The bundle of His normally divides into?
right and left branches
Sympathetic stimulation causes...?
a positive chronotropic effect
in contractile cardiac muscles - the plateau phase of the action potential is mainly due to...?
Calcium influx through L-type channels
The P wave is caused by?
The PR interval is measured from?
the end of the P wave to the beginning of the QRS complex