BUMC Basics.pdf - Anesthesia Home

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• Erythromycin
• Phenothiazines
- Short QTc is caused by hyperkalemia,
hypermagnesemia, and hypercalcemia.
Hypertrophy and Enlargement
• P (atrial depolarization)
II (nl: 3mm
more Negative (>1mm)
RAE Tall >2.5mm More Positive Peak
>1.5mm
• Ventricular hypertrophy
- LVH: kissing waves, S in V1 + R in V5/6 >35mm, R
in aVL >11mm, or R in V4-V6 >25mm
- RVH: tall R wave in V1 with an amplitude > 7 mm or
R wave in lead V1 + the amplitude of the S wave in
lead V6 > 10 mm.
Signs of ischemia/infarction
• ST Depression: Indicates ischemia; significant if the ST
segment is depressed by 1 mm or more
• T-Wave Inversion (TWI): Can also indicate ischemia but
can be due to LVH with strain, abdominal pain,
medications (digitalis), and CNS hemorrhage.
• ST elevation (STE): indicates transmural infarction
(injury); significant elevation is 1 mm in the limb leads and
2 mm in the precordial leads.
• Q wave: indicates muscle death from a lack of blood
supply. A Q wave is considered pathologic if it is 1 small
box wide and deeper than 25% of the R wave. “Q’s in III
are free”.
Other
• Early repolarization: Concave “Happy” STE (early repol
which is seen in young pts and those w/ LVH, pericarditis,
myocarditis, head contusion, PTX)
• Low Voltage (