Thursday NF Interesting Case with Sonia and Dr. Robbins : Afib


An eldely man with a hx of hypothyroidism, recent L TKR and a hx of DVT 1 year prior who was called to come to the ED for a heart rate in the 130s found to be in new afib.


Key Learning Points

*Don’t treat subclinical hypothyroidism unless T4 is > 10 or thyroid antibody is +; the reason for treating subclinical hypothyroidism is risk of progressing to an overt hypothyroid state

*IV metop vs. PO Metop

-Per Kaiser Guidelines – oral beta blocker therapy is preferred over IV therapy in the setting of acute MI; oral administration should be initiated within the first 24 hours for MI patients who do not have any of the following (a) heart failure, (b) low output state, (c) increased risk for cardiogenic shock, or (d) other relative contraindications (PR > 240 msec, 2nd or 3rd degree heart block, active asthma or reactive airway disease).   Early aggressive IV beta blockade can pose a net hazard in hemodynamically unstable patients.

*Number to transfuse in setting of ACS?

-The optimal transfusion threshold in the setting of ACS remains unresolved.  In general transfuse when the Hgb is < 8 g/dL and consider transfusion when the Hgb is between 8 and 10 g/dL.  Pilot trial of 110 patients with ACS demonstrated that a liberal transfusion strategy to raise the Hgb >/= 10 was associated with greater survival at 30 days


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