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Chamber Hypertrophy and Enlargment

676 bytes removed, 21:01, 18 November 2011
m
Left ventricular hypertrophy
This is a better predicting criterium than the Sokolow-Lyon criterium, but less easy to remember, and therefore less often used.<cite>Levy</cite><cite>Sundstrom</cite>
In the '''[[Romhilt-Estes Score''' ]] LVH is ''likely'' with 4 or more points. LVH is ''present'' with 5 or more points:
Romhilt-Estes point score system ("diagnostic" >5 points; "probable" 4 points):<cite>Romhilt</cite>
{| class="wikitable"
||'''ECG Criteria'''||'''Points'''
|-
||Voltage Criteria (any of):
# R or S in limb leads ≥20&nbsp;mm
# S in V<sub>1</sub> or V<sub>2</sub> ≥30&nbsp;mm
# R in V<sub>5</sub> or V<sub>6</sub> ≥30&nbsp;mm
||3
|-
||ST-T Abnormalities:
* ST-T vector opposite to QRS without digitalis
* ST-T vector opposite to QRS with digitalis
||
3<br/>
1
|-
||Negative terminal P mode in V<sub>1</sub> 1&nbsp;mm in depth and 0.04 sec in duration (indicates left atrial enlargement)
||3
|-
||Left axis deviation (QRS of -30° or more)
||2
|-
||QRS duration ≥0.09 sec
||1
|-
||Delayed [[intrinsicoid deflection]] in V<sub>5</sub> or V<sub>6</sub> (>0.05 sec)
||1
|}
Romhilt has reviewed ECG LVH criteria and gives an overview of the many LVH scoring systems. <cite>Romhilt2</cite> Left ventricular hypertrophy has prognostic consequences as has been found in several studies.<cite>Levy</cite><cite>Sundstrom</cite>

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