CV pharmacology intro Flashcards
1
Q
Most antidysrhythmics tend to be negative chrontropes. What do chronotropes alter?
A
Heart rate
2
Q
What do inotropes alter?
A
Contractility
3
Q
What do dromotropes alter?
A
Conduction speed of AVN
4
Q
What do lusiotropes alter?
A
Relaxation of myocardium
5
Q
Heart rate is altered where and by which nervous system?
A
CV centre in medulla oblongata
Autonomic nervous system
6
Q
Cardiomyocytes work as syncytium - what does this mean?
A
Work as one - connected by intercalated discs
7
Q
The conduction of an AP is reliant on which cations and their channels?
A
Na
K
Ca
8
Q
Why may conduction of APs (and therefore HR) be dysfunctional?
A
Ectopic pacemaker
Damage to conducting tissue
Depression of CV centre (e.g. anaesthesia)
