Atrial Fibrillation Flashcards
Outline the ECG findings in a typical counter-clockqwise atrial flutter
On the ECG, note the saw-
tooth shaped P wave,
negative in leads II, III, and
aVF, which indicates the
retrograde conduction up
the atrial septum,
consistent with counter-
clockwise flutter.

there are 2 broad types of AFL
1. TYpical: negative F waves in __, ___ and ___ leads
- postivie F waves in ___
- counterlockwise reenntry around __
2. Atypical:
- other F wavemorphologies (ie____)
- ___ reentry around TVA
- reentry around other antaomic obstacles. Reentry around the __ __ ___, other circuits.
- TYpical: negative F waves in II, III and avFleads
- postivie F waves in V1
- counterlockwise reenntry around TVA - Atypical:
- other F wavemorphologies (ie/ F waves are positive in inferior leads and negative in V1)
- clockwise reentry around TVA
- reentry around other antaomic obstacles. Reentry around the mitral valve annulus, other circuits.
* F WAVES MEAN FLUTTER/FIB WAVES.
Atrial flutter is rapid but REGULAR and organized atrial activity. The mechanism is:
reentry. initiation requires critically timed extra atrial beats. maintenance requires depolarizing wavefront to always encounter excitable tissue.

outline the ECG findings in the Atypical AFL

- probably clockwise around the TVA
- Fwaves are positive in the intfeiror leads and the negative in V1. (reverse of typical AFL, which has negative inferior leads (II, III, aVF)
- recall that atrial flutter usually is negative in II III avF (inferior leasd)
how does catheter ablation help with atrial flutter
ablation in the tricuspid isthmus creates a line of block that interrupts the flutter circuit. Subsequent pacing from the coronary sinus demonstrates bi-directional block along the line of ablation

atrial fibrillation is a rapid, ____ and even chaortic form of atrial tachyarrhthmia with an _____ ventricular repsonse.
atrial fibrillation is a rapid, irregular and even chaortic form of atrial tachyarrhthmia with an IRREGULAR ventricular repsonse. the poor atrial function is causing irregular ventricular function too.

outline Afibrillation on ECG
lack of P waves
- irregular atrial activity
- irregularity of QRS complex
- Note; in atrial flutter, the sinus beat is still normal. Here, the QRS complex is just changing all the tiem.

AF causes an irregular rapid atrial activity. On the ECG; there is inconcsistent p wave rate and morphology .
with AV conduction: irregularly irregulay ventricular repsonse. Usually it’s fast but can be slow if disease or drugs prolong the AVN refractory period.
With a complete AV block: ventricular rate is dependen on the __ __, and is ___.
AF causes an irregular rapid atrial activity. On the ECG; there is inconcsistent p wave rate and morphology .
with AV conduction: irregularly irregulay ventricular repsonse. Usually it’s fast but can be slow if disease or drugs prolong the AVN refractory period.
With a complete AV block: ventricular rate is dependen on the escape rhythm, and is regular.
important “risk factors” that contribute to likelithood of Afib
- Age (5% of octogenarians)
- Hypertension
- Hyperthyroidism*
- Mitral valve disease
- Any heart disease
- Lung disease
- Obstructive sleep apnea (OSA)
- Surgery*, especially cardiac surgery because of the high chatecholamine amounts
- Alcohol (“Holiday Heart Syndrome”)
- High vagal tone • Others . . .
when is it normal for someone to have lone AF
- 20 year old healthy people
- children
- marathon runners
3 classifications of how atrial fibrillations is categorized
- paroxysmal
- persistent
- permanent.

tachy-brady syndrome
- combination of paroxysmal atrial fibrillation and bradycardia at other times.
- usually sinus bradycardia or sinus pauses at the termination of AF.

treatments for tahcy-brady syndrome
Rate slowing drugs or antiarrhythmic drugs are
required to treat the “tachy” component (the AF).
These will all worsen the sinus node dysfunction.’
• A permanent pacemaker is required to manage
the “brady” component
symptoms of AF/AFL
Symptoms of AF/AFL
- *• Palpitation, dyspnea (including chest
pressure) , fatigue (no energy)**
1. Ventricular response is too fast
- Ventricular response is irregular
- Loss of atrial “kick”
• No symptoms at all.
– Some people are never symptomatic, and others
are sometimes symptomatic. – TIA or stroke can be the first manifestation of
AF(L) (and pt may be in SR or AF(L) when they
have the stroke).
physical findings of AF
irregularly irregular pulse rate and volume (often rapid)
- variable intensity of first heart sound
- no S4.
- when the patient also has a systolic murmur; it could be due to MR or stenosis
- constant intensity== regurgitent
- variable intensirty murmur = ejection (AS, stenosis)
consequences of AF/L

T/F: You gotta watch for a lot of dyspnea in someone with AF because of the likelihood of pulmonar embolism.
FALSE. pulmonary embolism is not a consequence of AFL. BUT pulmonar embolism can trigger AF.
- stiil you should watch for dyspnea regardless
4 steps to treatment of AFL
- consider anticoagulation
- consider underlying cauases
- consider rate control or rhythm control
- consier anticoagulation (again)
types of anticoagulants that can be considered for AFL treatment
- warfarin (INRR 2-3)
- DOACS; dabigatran, apixaban, rivaroxban, edoxaban.
- you must consider the risk of embolic stroke form AF vs hemorrhagic stroke (from anticoagulation)
- people with moderate to severe mitral stenosis or mechanical heart valves are at high risk for stroke– ONLY USE warfain.DO NOT GIVE DOAC– severe mitral stenosis or mechanical heart valve are aka “valvular AF”
valvular AF; mitral stenosis and mechanical heart valve. THIS IS NOT THE SAME IF THEY HAVE AORTIC STENOSIS. ONLY MITRAL STENOSIS CAUSES VALVULAR AF.
T/F blood testing monitoring is required for DOACs/NOACS
false. the pro about doacs is that they dont need to be continuously monitored.
“valvular AF”
people with mitral stenosis (NOT ANY OTHER TYPE OF VALVE STENOSIS) or mechanical heart valves.
note; remember hthe CHAD65 acronym for OAC therpay in AF.
note the Aspirin does not prevent stroke. the aspirin is reccommended to prevent vascular events.










