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Old 04-14-2014
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Info ECG specific findings

I thought it may be useful to write down specific findings in ECG. I know there is thread in the forum with ECG strips for high yield cardio disease, such MI ect.

anyhow, I just wanted to share other specific findings, such these to begin with:

- biphasic P wave in VII in LA enlargement.

The 1st part of the P wave represent the RA, the last part the LA. Normally in V1 the wave can be biphasic because the 2 waves are moving in opposite directions. Anyway, with LA enlargement the LA component of the P wave lasts longer without changing amplitude, therefore the resultant P wave is longer and biphasic in VII

- Tall P wave in VII in RA enlargement

The RA depolarization lasts longer and its peak falls on top of the LA wave, producing a taller P wave (>2.5), while the total width remains unchanged

Please correct me if I'm wrong!!!
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Old 04-14-2014
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Default more ECG findings

Pericarditis:

Widespread ST elevation and PR depression in all leads except aVR where you'll find reciprocal ST depression and PR elevation

Exception: uremic pericarditis, because the inflammatory cells don't penetrate the myocardium.
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Old 04-14-2014
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Default Pericardial effusion

Pericardial Effusion:

ECG shows QRS alternans. It is caused by the swinging movements back and forth of the hearth in the liquid.
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Old 04-14-2014
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Default some more.... you're free to add

Multifocal Atrial Tachycardia:

At least 3 different P waves, short QRS. Look for a patient with underlying lung disease, such COPD.

WPW:

short PR interval (<0,12ms), delta waves before QRS, which is wide.

Tricuspid Valve Atresia:

L axis deviation and absent R waves in precordial leads (from hypoplastic RV, in contrast with normal newborn infants who have R axis deviation), tall peaked P waves (from RA enlargement).
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Old 04-15-2014
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Pulmonary Embolism:

Unspecific ST-T changes (most common ECG finding), tachycardia, S1Q3T3 (Large S wave in lead I, large Q wave in lead III, inverted T wave in lead III. This occurs less often and it's a sign of cor pulmonale)

Cor pulmonale:


from RV hypertrophy tall R waves in V1 & V2, from RA hypertrophy tall P waves in V1 & V2.
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Old 04-17-2014
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Default

Hyperkalemia:

peaked T waves, wide QRS, small P waves

Hypokalemia:

flattened or inverted T waves, U wave, ST depression, prolonged PR
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