Left ventricular hypertrophy
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Left ventricular hypertrophy is defined as left ventricular mass index > 118 g/m2 in men and > 104 g/m2 in women.[1]
Diagnosis
Electrocardiogram
Criteria
Various electrocardiographic criteria exist: Sokolow-Lyon index, Cornell voltage index, Cornell product, Gubner, and Romhilt-Estes score.[2] Sokolow-Lyon index
- SV1+RV5>3.5 mV
or
- V6>3.5 mV
Cornell voltage index
- Males: RaVL+SV3>2.8 mV;
- Females: RaVL+SV3>2.0 mV
Cornell product
- Males: (SV3+RaVL)xQRS duration 2440 ms or more
- Females: (SV3+(RaVL+8 mV))xQRS duration>2440 ms
Gubner criteria
- RI+SII 25 mV or more
Romhilt-Estes score greater than 4 or 5 points:
- Evidence of excessive voltage (any one of the following) - 3 points
- largest R or S wave in limb leads 20 mV or more
- S wave in V1
- V2 30 mV or more
- R wave in V5
- V6 30 mV or more
- Evidence of LV strain - 3 points (only 1 point if taking digitalis)
- ST-T segment vector shifted opposite to QRS vector
- Evidence of left atrial involvement - 3 points
- terminal negativity of P wave in V1 1 mm or more with duration 0.04 s or more
- Evidence of left axis deviation - 2 points
- left axis –30° or less
- Prolonged QRS duration - 1 point (0.09 s)
- Intrinsicoid deflection - 1 point
- intrinsicoid deflection (interval between start of QRS complex and peak of the R wave) in V5 or V6 0.05 s or more
Sensitivity and specificity
A systematic review found that the accuracy of the electrocardiographic indices and criteria for diagnosing left ventricular hypertrophy is:[2]
- sensitivity 11% to 21%
- specificity 89% to 99%
References
- ↑ Molloy TJ, Okin PM, Devereux RB, Kligfield P (1992). "Electrocardiographic detection of left ventricular hypertrophy by the simple QRS voltage-duration product". J. Am. Coll. Cardiol. 20 (5): 1180–6. PMID 1401620. [e]
- ↑ 2.0 2.1 Pewsner D, Jüni P, Egger M, Battaglia M, Sundström J, Bachmann LM (2007). "Accuracy of electrocardiography in diagnosis of left ventricular hypertrophy in arterial hypertension: systematic review". BMJ 335 (7622): 711. DOI:10.1136/bmj.39276.636354.AE. PMID 17726091. Research Blogging.