Haemodynamically UNSTABLE patients

Any of:
-
- Shock sBP <90mmHg – poor perfusion
- Reduced level of consciousness – poor brain perfusion
- Cardiac Ischaemia – poor heart perfusion
- Pulmonary Oedema – poor lung perfusion
Emergency DC Cardioversion (DCC) is the mainstay of treatment. Obviously DCC is uncomfortable experience and sedation is preferable, however, if unstable sedation may not be an option.
DC Cardioversion (SYNCRONISED)

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-
- Consent (best interest if needed)
- Sedation if possible (may require anaesthetic assistance)
- DC Cardiaversion
- Syncronise (white dots appear over QRS on monitor)
- Energy
- 1st shock 70J
- 2nd shock 120J
- 3rd shock 200J
- Charge & Shock (oxygen away, everyone clear!)
- Reassess – repeat for further shocks if required
Tachycardia Guide line – Resus Council
Rate Control

- First line:
- β-Blocker – outperforms calcium channel blockers in studies
- Non-dihydropyridine calcium channel blockers (Diltiazem/Verapamil) – esp. in Severe COPD/Asthma
- Second Line:Consider adding in
- Digoxin – however, digoxin alone is not effective in patients with increased sympathetic drive. Observational studies have associated digoxin use with excess mortality in AF patients)
- Amiodarone can be useful as a last resort when heart rate cannot be controlled with combination therapy in patients who do not qualify for non-pharmacological rate control
Rhythm control in ED
“Early cardioversion is not recommended without appropriate anticoagulation or transoesophageal echocardiography if AF duration is longer than 24 h, or there is scope to wait for spontaneous cardioversion.”
In reality risks increase beyond 12hrs from onset, and those reverted in ED will often return to AF by the time they get to AF clinic follow up.