Atrial Fibrillation Flashcards

1
Q

What is a risk factor to developing AF?

A

-HTN, IHD, Structural heart diseases, DM, Thyrotoxciosis, Alcohol, COPD

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2
Q

If AF starts within 48 hours what is it classed as?

A

Acute AF

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3
Q

If AF lasts over 48 hours what type of AF is this?

A

Chronic

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4
Q

What happens in the body during AF?

A

Irregular, rapid atrial rate (300-600bpm) secondary to chaotic conduction within atria.

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5
Q

What is the ventricular rate during AF?

A

100-180 bpm

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6
Q

What does sluggish atrial blood flow allow in patients with AF?

A

Partial activation of the clotting cascade

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7
Q

What are the common symptoms of AF?

A

*Some asymptomatic
*SOB, Dizzy, Fatigue, Palpitations

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8
Q

What are the complications of AF?

A

Heart failure
Angina
Thromboembolism (stroke)

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9
Q

How is AF managed?

A

Stroke prevention
Rate control
Rhythm control

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10
Q

How is stroke risk assessed?

A

CHA2DS2-VASc stroke risk score
-Consider anticoagulation
-Assess the bleeding risk via ORBIT score

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11
Q

What are examples of DOACS?

A

Apixaban, Rivaroxaban, Edoxaban, Dabigatran

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12
Q

What surgical procedure can open up / prevent blood clots from forming due to AF?

A

Left atrial appendage occlusion - only used if anti-coagulation is not tolerated or is contraindicated

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13
Q

What is the first line strategy for AF?

A

Rate control

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14
Q

When is Rate control not used for first line for AF?

A

-Reversible cause (infection)
-Heart failure caused by AF
-New onset AF (within last 48 hours)

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15
Q

What is the second line rate control strategy for AF?

A

Standard B-blockers - (Bisoprolol)
OR
Rate limiting CCB
(Diltiazem or Verapamil)

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16
Q

If a patient has a sedentary lifestyle what drug would be given for rate control in AF?

A

Digoxin

17
Q

If monotherapy for rate control doesn’t control the AF what should be done?

A

Combine 2 drugs
-B-blocker,
-Diltiazem
or Digoxin!

18
Q

What is the actual first line for new onset of AF?

A

Cardioversion

19
Q

What is the first line therapy for Rhythm control in AF?

A

Cardioversion

20
Q

What is the second line therapy for Rhythm control in AF?

A

1st - Standard b-blocker (bisoprolol)
or Dronedarone
or Amiodarone

21
Q

If a patient is in Heart Failure, what drug would be preferred for rhythm control?

A

Amiodarone

22
Q

What drug is used to treat Paroxysmal (PAF) attacks of AF?

A

Flecainide

23
Q

What shouldn’t be used for attacks (paroxysmal) of AF?

A

Digoxin

24
Q

What do you do if other treatment has failed to control symptoms of AF or is unsuitable?

A

*Left atrial ablation
-RF ablation a point in left atrium where arrhythmia generated
*Pace and ablate
-RF ablation of AV node and pacemaker