Atrial Fib Flashcards
1
Q
How does thyroid hormone cause a fib?
A
Its effects in ion currents of atrial myocytes contribute to genesis of AFib. Causing shortening of AP duration resulting in a substrate for AFib
2
Q
What are the two causative elements introduce that increase the risk of AFib?
A
Atrial structure
Electrical abnormalities
3
Q
What are atrial structure changes that increase the risk of atrial fibrillation?
A
Fibrosis, dilation, ischemia, infiltration, hypertrophy
4
Q
What are electrical abnormalities that increase the risk of AFib?
A
Increased heterogeneity, lower conduction, shorter AP, increase automaticity, abnormal Ca movement
5
Q
What are the primary contributors to AFib?
A
Atrial tachycardia remodelling and RAAS activation
