LVPWd Normal Range and Clinical Significance
The normal range for left ventricular posterior wall thickness in diastole (LVPWd) is 0.6–0.9 cm in women and 0.6–1.0 cm in men, with values ≥1.0 cm in women or >1.0 cm in men indicating left ventricular hypertrophy. 1
Normal Reference Values
The 2015 ASE/EACVI guidelines provide definitive reference ranges for LVPWd measured by linear methods 1:
- Women: 0.6–0.9 cm (6–9 mm)
- Men: 0.6–1.0 cm (6–10 mm)
These values remain unchanged from prior guidelines and represent the most validated measurements for clinical practice. The guidelines emphasize that these are the recommended and best validated reference ranges.
Clinical Significance
Assessment of Left Ventricular Hypertrophy
LVPWd is a critical component in diagnosing and categorizing LV hypertrophy. When LVPWd exceeds the upper normal limit, it indicates increased LV mass, which carries prognostic implications for morbidity and mortality 1.
Calculation of Relative Wall Thickness (RWT)
LVPWd is essential for calculating RWT using the formula: (2 × posterior wall thickness) / LV internal diameter at end-diastole 1. This calculation allows you to:
- RWT ≤0.42 with normal LV mass = Normal geometry
- RWT >0.42 with normal LV mass = Concentric remodeling
- RWT >0.42 with increased LV mass = Concentric hypertrophy
- RWT ≤0.42 with increased LV mass = Eccentric hypertrophy
This geometric classification has independent prognostic value. Research demonstrates that RWT is an independent predictor of both systolic and diastolic dysfunction in hypertensive patients, even more so than LV mass index alone 2.
Important Clinical Considerations
Age-Related Changes
LVPWd increases with age—research shows median values increase from 7.5 mm in patients aged 20-29 years to 9.8 mm in those aged 60-70 years 3. When interpreting LVPWd, consider age-specific norms to avoid misclassifying older patients as having pathologic hypertrophy.
Body Size Indexing
While the guidelines provide absolute measurements, patients at extremes of height or body surface area may be misclassified 1. Recent evidence suggests that indexing wall thickness by height^2.7 may more accurately reflect disease severity, particularly in women who have smaller body sizes 4.
Gender Differences
Men have slightly higher upper normal limits (1.0 cm vs 0.9 cm), but when indexed for body size, gender differences largely disappear 4. The adoption of the same absolute cut-off values for both sexes could lead to underdiagnosis in women.
Measurement Technique
Both M-mode and 2D echocardiographic measurements are acceptable for normally shaped ventricles 1. Measurements should be obtained at end-diastole (at the time of Q wave inscription on ECG). The echocardiographic end-diastolic dimension has been validated against direct surgical measurement with excellent correlation (r=0.76) 5.
Common Pitfalls
Asymmetric hypertrophy: In patients with upper septal hypertrophy or regional wall thickness variations, linear measurements may over- or underestimate true LV mass depending on measurement location 1. Use the same methodology and measure at the same ventricular level for serial assessments.
Isolated wall thickness: A thickened posterior wall alone is less sensitive for detecting LV hypertrophy than calculating total LV mass—only 48% of patients with electrocardiographic LVH had wall thickness ≥12 mm, while 78% had increased LV mass 6.