8.Cardiac Electrical Activity Flashcards
1
Q
FRT:
ARP:
RRP:
SNP:
A
Full Recovery Time
Absolute Refractory Period
Relative Refractory Period
SuperNormal Period
2
Q
___________ cells are branched, have a single nucleus and attached by intercalated discs
A
Myocardial muscle
3
Q
Normal activation sequence
A
Sa node Atrial myocardium AV node bundle branches Purkinje network Ventricular Myocardium
4
Q
example of ECG ABNORMALITIES
A
Wolff-Parkinson-White Syndrome
WPW
5
Q
Three electrical properties cardiac myocytes exhibit
A
Excitability
conductivity
Automaticity
6
Q
Cells with fast response
A
Artria
Ventricles
7
Q
Cells with slow response
A
SA and AV node
8
Q
Cells with Automaticity
A
SA node
9
Q
mechanisms to alter intrinsic rate of pacemaker discharge
A
change rate of depolarisation (slope)
alter threshold
alter max. diastolic potential
10
Q
SA node is pacemaker of heart because
A
only automaticity highest interinsic rate overdrive suppresion (dominant)
